Antonio Moro
(University of Seville)
17/12/2012, 13:35
Invited
The discovery of halo nuclei in the middle eighties marked the beginning of a serial of nuclear and
theoretical studies aimed at understanding their peculiar properties, the most remarkable being
the presence of one or two weakly-bound nucleons with a high probability of exploring distances
well beyond the range of the binding potentials. This gives rise to a dilute density...
Marek Pfutzner
(University of Warsaw (PL))
17/12/2012, 14:05
Submitted
Recently, we have completed a measurement of beta-decay of 6He focusing on a very weak decay branch with emission of a deuteron. The bunches of 6He ions were delivered by the REX-Isolde and implanted into the Optical Time Projection Chamber, were their decays were recorded. Decay events of 6He into an alpha particle and a deuteron were clearly observed. Preliminary results of this experiment...
Sara Sambi
(Katholieke Universiteit Leuven (BE))
17/12/2012, 14:25
Submitted
Experiment IS520 aimed at studying the ground state of the unbound system 13Be.
The determination of the sequence of its low-lying states can shed light on the evolution of the N = 8 shell closure towards the dripline.
While a resonance in 13Be at about 2 MeV above the neutron emission threshold is confirmed and identified as a d5/2 state, the situation regarding other lower-lying states...
Nobuaki Imai
(High Energy Accelerator Research Organization (KEK))
17/12/2012, 14:45
Submitted
We measured an excitation function of the proton resonance elastic
scattering on 30Mg of 2.92 MeV/nucleon to study the isobaric
analog resonances of the low-lying bound states in 31Mg. We
successfully observed several resonances. In this paper, we'll
present the angular momenta and spectroscopic factors of the parent
bound states in 31Mg obtained by the R-matrix analysis on...
Gunvor Thinggaard Koldste
(Aarhus University (DK))
17/12/2012, 15:05
Submitted
The nucleus 30S is situated at the proton drip line and thus plays an important role in the rp- and alpha-p-process via the 29P(p,gamma)30S reaction. The astrophysical relevant resonances are situated just above the proton threshold. We have studied the nucleus through beta-delayed proton decays of 31Ar in the IS476 experiment.
Knowledge of the resonances just above the proton threshold of...
Mark Bissell
(Katholieke Universiteit Leuven (BE))
17/12/2012, 15:25
Invited
Since the 1st April this year six experiments have been conducted by the COLLAPS collaboration using 76.5 shifts of ISOLDE online time. During the year experiments with Ca, neutron deficient Cd, neutron rich Cd, neutron rich K, biomedical-β-NMR with Mg, and finally Mn have been completed successfully. Preliminary results from these experiments will be presented covering aspects of physics...
Tohru Motobayashi
(RIKEN Nishina Center)
17/12/2012, 16:25
Invited
RIKEN has provided fast radioactive isotope (RI) beams since 1990. The new facility of RIKEN RIBF (RI Beam Factory) started operation in the end of 2006, and various experimental studies using its high-intensity RI beams with energies around 200 MeV/nucleon have been performed. They include production of many new neutron-rich isotopes, lifetime measurements for several r-process nuclei, and...
Riccardo Orlandi
(Katholieke Universiteit Leuven (BE))
17/12/2012, 16:55
Submitted
Neutron-rich nuclei with magic numbers of neutrons and protons are reference points to map and understand the reorganization of the shell structure away from the line of beta stability. The region of nuclei near $^{78}$Ni, the doubly-magic nucleus with the largest N/Z ratio, is the focus of considerable experimental and theoretical interest. The extent of the magicity of $^{78}$Ni is still...
Jytte Elseviers
(K)
17/12/2012, 17:15
Submitted
The region around the nucleus 68Ni, with a shell closure at Z = 28 and a sub-shell closure at N = 40, has drawn considerable interest over the past decades. 68Ni has properties that are typical of a doubly-magic nucleus, such as a high excitation energy and low B(E2:2+-0+) transition probability for the first excited 2+ level [1-3] and a 0+ level as the first excited state [4]. However, it...
Mr
Andres Illana Sison
(Consejo Superior de Investigaciones Cientificas (CSIC) (ES))
17/12/2012, 17:25
Submitted
Nuclear magnetic moments are sensitive probes of the single particle properties of the nuclear wave function. The magnetic moment operator, with its explicit dependence on protons or neutrons involved in the configuration of the state and on their angular momenta, serves as a stringent test of the proposed main configuration of the nuclear state, as well as of other admixtures. It is,...
Stefanie Klupp
(Technische Universitaet Muenchen)
17/12/2012, 17:35
Submitted
The microscopic details concerning the assumed magicity of the 68Ni nucleus are not yet fully understood. Due to the parity change between fp orbitals and the g9/2 orbital, a small gap between these can lead to a high-lying first excited state in 68Ni. This underlying subshell structure seems also responsible for the unusual behavior of excited 0+ states in neighboring even-even nuclei.
Our...
Ioana Gheorghe
(H. Hulubei National Institute for Physics and Nuclear Engineering)
17/12/2012, 17:45
Submitted
The Beta decay of 82Zn has been studied at ISOLDE, CERN using a fast timing experimental
setup, which included a thin NE111A plastic beta detector, two HPGe gamma detectors and two
LaBr3(Ce) detectors all positioned in a close geometry. A new value for the lifetime of the beta
decaying g.s. of 82Zn was obtained and the -n branching ratio was measured for the first time.
Tentative level...
Matthew Alexander Fraser
(CERN)
17/12/2012, 18:05
Poster
The feasibility of pre-bunching at a sub-harmonic frequency into the REX-ISOLDE RFQ was investigated to respond to a request for a 100 ns bunch spacing from several new experiments striving to operate at the HIE-ISOLDE facility, see e.g. [1]. The HIE-ISOLDE project [2] represents a major upgrade of the ISOLDE nuclear facility with a mandate to increase the energy and intensity, as well as...
Eleftherios Zografos
(CERN)
17/12/2012, 18:05
CATHI poster
In this poster the 3D Integration models for the various installation stages of HIE-Isolde are presented. Those three in total stages vary from the 5.5 MeV Stage 1 to the 10 MeV Stages 2a and 2b. Additionally we focus on the two most demanding from the integration point of view areas i.e. the intercryomodule area and the quadrupole doublets. Finally the progress on the integration of the...
Vadym Paziy
(Universidad Complutense de Madrid),
Victoria Vedia
(Universidad Complutense de Madrid (UCM))
17/12/2012, 18:05
Poster
V. Vedia1, L.M. Fraile1, H. Mach1, B. Olaizola1, V. Paziy1, E. Picado1, J.M. Udías1
1 Grupo de Física Nuclear, Universidad Complutense, Madrid, Spain
The measurement of absolute nuclear transition probabilities is a very sensitive tool to study the structure of atomic nuclei. Direct access to transition rates can be achieved via the lifetimes of the nuclear levels de-excited in...
Paula R. P. Allegro
(Instituto de Física, Universidade de São Paulo, São Paulo, Brazil and Dipartimento di Fisica e Astronomia dell’Università and INFN, Sezione di Padova, I-35131, Padova, Italy)
17/12/2012, 18:05
Poster
One of the most reliable models to describe the nucleus is the Large Scale Shell Model, which has demonstrated to reproduce with very good accuracy detailed nuclear properties (see ref. [1] for a review). In the A=50-80 mass region, many studies have been published attempting to explain the role of the 0g9/2 orbital in the high spin states, especially in the neutron-rich nuclei like, for...
Michal Adam Czapski
(CERN)
17/12/2012, 18:05
CATHI poster
A search of new target materials showing better mechanical characteristics and release properties of radioisotopes is one of the aims of the HIE-ISOLDE project.
It has been already proven that by controlling the microstructure of a target material in terms of grain size down to 50 nm, and porosity its release properties can be altered. On the other hand such changes also influence its...
Mr
Sebastian Rothe
(CERN)
17/12/2012, 18:05
Poster
The resonance ionization laser ion source (RILIS) is the most widely used ion source at ISOLDE. Up to three beams of precisely tuned pulsed lasers ionize the element of interest with high selectivity and efficiency. To keep up with the increasing demand for RILIS use the fleet of lasers has been gradually upgraded in recent years. The system now comprises three tunable dye lasers and three...
Andrea Polato
(CERN)
17/12/2012, 18:05
CATHI poster
Cooling and Ventilation group’s activity can be split into two main tasks:
1. Upgrade works during LS1:
a. Modification of the Cooling and Ventilation systems due to the new targets handling robots to be installed inside the Tunnel;
b. Cooling and Ventilation of the Class A Laboratory in prevision of the MEDICIS Laboratory extension;
2. Design Study activities related to the...
Jacobo Abraham Montano Carrizales
17/12/2012, 18:05
CATHI poster
The High Intensity and Energy (HIE)-ISOLDE project is a major upgrade of the existing ISOLDE and REX-ISOLDE facilities with the objective of increasing the energy and the intensity of the delivered radioactive ion beam (RIB) [1]. In order to accommodate the future increase of primary beam intensity delivered by the new LINAC4 H- driver, a major study is being carried out to upgrade the...
Mathieu Augustin
(CERN)
17/12/2012, 18:05
CATHI poster
The High Intensity and Energy (HIE)-ISOLDE project at CERN, features major improvements of the High Resolution Separator (HRS).
In its current design, the performance of the HRS is constrained by ion source emittance and second-order distortions in the magnet dipoles. A new layout has been proposed to overcome these limitations. It firstly features the operation of the RFQ beam cooler in...
Robert Stegmann
(Technische Universitaet Darmstadt (DE))
17/12/2012, 18:05
Poster
In order to investigate the effect of shell stabilization of mixed-symmetry states [1] it is intended to identify and study the mixed symmetry states in the N = 80 isotones. A necessary prerequisite for such an endeavor is the measurement of the E2 transition strength of the first 2+ state. A beam of radioactive 142Sm ions with an energy of 2.85 MeV/u was impinging on a 1.4 mg/cm2 48Ti as well...
Leonel Morejon Hernandez
17/12/2012, 18:05
CATHI poster
Using Fluka simulation code for particle transport by Monte-Carlo methods, and Flair software, the radiation levels' assessment has been done for different stages of engineering design. Dose levels for both prompt radiation (due to targets' irradiation in the esperimental hall) and non-prompt radiation (due to the hot targets stored) have been calculated. The several contributions to dose have...
Esteban Daniel Cantero
17/12/2012, 18:05
CATHI poster
The space for beam diagnostics at the HIE-ISOLDE REX postaccelerator is limited in the longitudinal dimension due to the beam optics requirements. The diagnostic boxes that will be installed between the cryomodules contain among other instruments a short Faraday cup (FC), which is used for measuring the beam currents. The characterization of the performance for this FC is very critical due to...
Davide Lanaia
17/12/2012, 18:05
CATHI poster
The HIE–ISOLDE superconducting (SC) linac will start operation in 2015 with a total of 32 SC cavities envisaged when the installation is completed. The high numbers of cavities that operators will have to tune requires new software applications in order to ensure a fast machine set up. This contribution will show some ideas, and preliminary results about the applications that will be developed...
Guillaume Kautzmann
17/12/2012, 18:05
CATHI poster
The HIE‐ISOLDE project is a major upgrade of the ISOLDE REX facility. To run the linac in the optimum conditions the superconducting RF cavities and solenoids placed in cryomodules have to be aligned on the REX Nominal Beam Line (NBL) within a precision of, respectively, 0.3 mm and 0.15 mm at one sigma level along directions perpendicular to the beam axis. An integrated permanent alignment...
Noemie Marie Jecklin
(CERN)
17/12/2012, 18:05
CATHI poster
The HIE-ISOLDE project is the upgrade of the existing facility ISOLDE, which is dedicated to the production of a large variety of radioactive ion beams for many different experiments.
Among other things, HIE-ISOLDE project requires the production of many accelerating superconducting cavities in order to increase the speed and the energy of the beam. These superconducting cavities are made...
Jasna Papuga
(Instituut voor Kern- en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium)
17/12/2012, 18:05
Poster
Laser spectroscopy was performed on bunched beams of K (Z = 19) isotopes at the COLLAPS beam-line at ISOLDE-CERN. Nuclear spins, magnetic moments and mean square charge radii were deduced for 48,49,50,51K providing information about the nuclear structure beyond N = 28. In order to be able to measure the most exotic isotope (N = 32), a highly-efficient light collection region was developed and...
Mr
Ivan Budincevic
(IKS, KU Leuven)
17/12/2012, 18:05
Poster
Two successful experimental campaigns have been carried out in 2012 on the new Collinear Resonant Ionization Spectroscopy (CRIS) experimental beam line. During these campaigns a sensitivity to 1 atom in 60 was demonstrated using the measured yield of 202Fr as a reference. This work has also demonstrated a suppression of isobaric contamination by a factor of 105.
These experiments have...
Celine Van Beveren
(K)
17/12/2012, 18:05
Poster
One of the regions of the nuclear chart that has drawn considerable interest is that of the neutron-deficient Pb isotopes with Z ~ 82 and N ~ 104. This region exhibits a dramatic manifestation of shape coexistence.
The occurrence of competing proton intruder states in the odd-Z Tl isotopes opens the ground for complex structures at low energy leading to isomerism. However, the spectroscopic...
Martino Colciago
(CERN)
17/12/2012, 18:05
CATHI poster
In the framework of the High Intensity and Energy (HIE)-ISOLDE project at CERN the working specifications of the High Resolution Separator will change.
The HRS dipole magnetic field has to be controlled with an accuracy of a few ppm and a much faster response than the current one. In order to achieve this strict requirement an accurate model of the magnet has to be determined and a new low...
Panagiotis Farantatos
17/12/2012, 18:05
CATHI poster
The aim of the HIE-ISOLDE project is to greatly expand the physics program compared to that of REX-ISOLDE, containing three major elements: higher energies, improvements in beam quality and flexibility, and higher beam intensities. In the framework of this project, a new beam focusing quadrupole electromagnet is designed, which shall be followed by its series production in industry. Extensive...
Razvan Lica
(Horia Hulubei National Institute of Physics and Nuclear Engineering)
17/12/2012, 18:05
Poster
The beta decay of 80Zn was part in systematic studies of neutron rich Zn nuclei. The measurements were performed at the ISOLDE facility at CERN. The beta gated gamma-gamma coincidences provided a significantly modified level scheme for 80Ga compared to the previously reported one. The main goal of our research was to identify excitation energies of two beta decaying states. The new level...
Serena Cimmino
(Universita e INFN (IT))
17/12/2012, 18:05
CATHI poster
The main objectives of the BETA BEAMS project is to produce high energy beams of pure electron neutrinos and anti-neutrinos for oscillation experiments, by beta decay of 6He and 18Ne radioactive ion beams, studied in a decay ring at γ=100.
The production of 6He beam has already been accomplished using a thick beryllium oxide target; however, the production of the needed rate of 18Ne has...
Susanne Kreim
(CERN)
17/12/2012, 18:05
Poster
As matter becomes very neutron-rich, the proton-neutron imbalance changes the structure of nuclei with respect to the level ordering observed in stable nuclei. Since models used for predicting the structure of exotic nuclei are fitted to describe the shell gaps in stable nuclei, the question arises whether these models produce a correct description of the shell closures far from stability...
Alex Garcia Sosa
(CERN)
17/12/2012, 18:05
CATHI poster
In the context of the HIE-ISOLDE upgrade of the post-accelerator, a beam profile monitor is foreseen as an instrumentation device for the superconducting LINAC and beam transfer lines. It consists of a slit scanner and a redesigned Faraday cup. The effect of the different slit sizes on the current monitor has been studied in order to optimize the beam profile results. Numerical simulations...
Sabine Bönig
(Technische Universität Darmstadt)
17/12/2012, 18:05
Poster
The cadmium isotopic chain with a proton number of Z=48 is one of the most interesting in nuclear structure physics due to the proximity to the proton shell closure at Z=50. Performed Coulomb excitation experiments on 122-126Cd exhibit high excitation strengths for the 0_gs^+→2_1^+ transition. Shell model calculations are not able to reproduce the experimentally found values although the shell...
Ralf Erik Rossel
(Johannes-Gutenberg-Universitaet Mainz (DE))
17/12/2012, 18:05
Poster
With a steadily increasing on-line operation time of a record 2500 hours in the year 2011, the Resonance Ionization Laser Ion Source (RILIS) is one of the key components of the ISOLDE on-line isotope production user facility at CERN, Geneva, Switzerland. It has played a major role in providing highly demanded radioactive ion beams of various elements with the highest efficiency and unmatched...
Prof.
Andrei Andreyev
(University of York)
17/12/2012, 18:05
Poster
On behalf of York-KU Leuven-Gatchina-Mainz-Bratislava-Liverpool-ISOLDE collaboration
The competition between spherical and deformed nuclear shapes at low energy gives rise to shape coexistence in the region of the neutron-deficient lead isotopes with Z~82 and N~104 [1]. In order to determine to which extend the ground and/or isomeric states of those and neighboring nuclides are affected by...
Mario Armin Hermann
(Hochschule Karlsruhe, Technik und Wirtschaft)
17/12/2012, 18:05
CATHI poster
The High Intensity and Energy Isolde (HIE-ISOLDE) project aims at upgrading CERNs present ISOLDE and REX-ISOLDE facilities to increase the energy and intensity of the delivered radioactive ion beams. This is achieved by means of a new post-accelerating, superconducting linac, accompanied by a design study of the major subsystems and the target areas, linked with the increased intensity of the...
Deyan Yordanov
(Max-Planck-Gesellschaft (DE))
17/12/2012, 18:05
Poster
We report on the first study of cadmium by high-resolution laser spectroscopy. Nuclear spins, electromagnetic moments and root mean square charge radii of ground and isomeric states have been determined along the chain, ultimately reaching the neutron 50 and 82 shell closures. These experimental data provide a solid basis for improving the nuclear-structure understanding in the vicinities of...
Mr
Vadym Paziy
(Universidad Complutense de Madrid)
17/12/2012, 18:05
Poster
V. Paziy1, H. Mach1, L.M. Fraile1, A. Aprahamian3, C. Bernards4, J.A. Briz5, B. Bucher3, C. J. Chiara6, Z. Dlouhy7, D. Ghita2, I. Gheorghe2, P. Hoff8, U. Köster9, W. Kurcewicz10, R. Lica2, N. Marginean2, R. Marginean2, B. Olaizola1, J.M. Régis4, M. Rudigier4, J.M. Udías1, T. Sava2, G. Simpson9, M. Stanoiu2, L. Stroe2, W. Walters11
1 Grupo de Física Nuclear, Universidad Complutense, Madrid,...
Prof.
William Walters
(University of Maryland)
17/12/2012, 18:05
Poster
Following the identification of the deformed particle-hole intruder states in 67Co by Pauwels et al., and the subsequent identification of a second low-energy 1+ level in adjacent odd-odd 66Co, along with other isomeric levels, the question arose, “how can the structure of 66Co be compared with the evolution of the structure of the lighter odd-odd Co isotopes?” Stated another way, are there...
Matthias Nagl
(Uni-Göttingen)
17/12/2012, 18:05
Poster
In order to optimize beam-time usage and sample handling as well as radio protection a new GPS implantation chamber with advanced load-lock-system is currently being built. In addition to this implantation chamber a second chamber containing facilities for beam deceleration/acceleration with the sample held at a potential of up to ± 60 kV will be mounted right behind the first chamber. In this...
Carla Babcock
17/12/2012, 18:05
CATHI poster
The ISCOOL RFQCB (radio frequency quadrupole cooler and buncher) at the
CERN facility ISOLDE is used to reduce the emittance and energy spread of the beam, and to give it a time structure before it is sent to the experiments [1]. The upgrade to ISOLDE, HIE-ISOLDE, will encompass many aspects, including an upgrade to the high resolution separator area that will see the ISCOOL design improved...
Andrey Shornikov
17/12/2012, 18:05
CATHI poster
In order to comply with the extended requirements of the experimental program at ISOLDE after the upgrade to HIE-ISOLDE and with the prospective of the TSR@ISOLDE an upgrade of the existing REXEBIS charge breeder is being investigated. The new breeder is aiming to provide ions for reacceleration with A/q< 4.5 required by the linac and with a repetition rate of 100 Hz (linac limit). To reach...
Marek Lewitowicz
(GANIL)
18/12/2012, 08:30
Invited
Recent results related to study of nuclei far from stability obtained at the GANIL facility [1] will be presented. Developments of high intensity stable and radioactive ion beams at GANIL cyclotrons and SPIRAL1 facility as well as important upgrade of existing detection systems will open new opportunities in experimental nuclear physics. Future operation modes of the GANIL/SPIRAL2 complex as a...
Dr
Gary Simpson
(LPSC)
18/12/2012, 09:00
Submitted
The NICOLE dilution refrigerator is an on-line Low-Temperature Nuclear Orientation facility installed at ISOLDE, principally used to measure the magnetic moments of atomic nuclei.
The ground-state of the nucleus 49Sc has only one f7/2 proton outside a doubly magic 48Ca core. This makes this nucleus one of the few available for testing the fundamental theory of nuclear magnetism. The magnetic...
Vladimir Manea
(CSNSM Centre de Spectrometrie Nucleaire et Spectrometrie de Masse)
18/12/2012, 09:20
Submitted
Various experiments on neutron-deficient isotopes around the magic proton number Z = 82 suggest a complex behavior in the proton-neutron valence space. The occupation of intruder proton orbitals leads to shape coexistence, or sudden transitions from spherical or slightly-deformed to deformed shape. One important example is the shape transition which occurs in the Au isotopic chain at mass...
Nele Kesteloot
(Katholieke Universiteit Leuven (BE))
18/12/2012, 09:40
Submitted
The neutron-deficient polonium isotopes with two protons outside the closed Z = 82 shell represent an interesting region of the nuclear chart to study shape coexistence in nuclei [1]. When going from the closed neutron shell at N=126 towards the most neutron deficient nuclei around N=104 the nuclear structure of the polonium isotopes changes from a general-seniority-type regime, towards a...
Lars Herman L Ghys
(Katholieke Universiteit Leuven (BE))
18/12/2012, 10:00
Submitted
Beta-delayed fission (bdf) happens when a precursor nucleus first undergoes beta-decay to a high-lying excited state above or around the fission barrier in the daughter nucleus that subsequently fissions. Although bdf is a rare event, its study allows us to probe the nuclear fission process of excited nuclei with low excitation energies and known ranges of spins and parities as shown from our...
Kara Marie Lynch
(University of Manchester (GB))
18/12/2012, 10:20
Submitted
The Collinear Resonant Ionization Spectroscopy (CRIS) experiment at ISOLDE, CERN uses laser radiation to stepwise excite and ionize an atomic beam for the purpose of ultra-sensitive detection of rare isotopes, and hyperfine structure measurements. The technique also offers the ability to purify an ion beam that is heavily contaminated with isobars, including the ground state of an isotope from...
Thierry Stora
(CERN)
18/12/2012, 11:10
Invited
The ISOLDE facility at CERN is in operation for more than forty years, and has successfully extended various technological aspects of the so-called ISOL beam production, extracting high-purity grade exotic radioisotope beam “online”, while irradiating 20cm thick targets with about 50% of the available CERN 1.4 GeV protons. In its present location since 1991, the ISOLDE facility has delivered...
Dr
Cristina Müller
(Center for Radiopharmaceutical Sciences ETH-PSI-USZ, Paul Scherrer Institute, Villigen-PSI, Switzerland)
18/12/2012, 11:40
Submitted
Background: Compared to other lanthanides, terbium (Tb) comprises clinically attractive radionuclides such as 152Tb and 155Tb with suitable decay properties for PET and SPECT imaging and 149Tb and 161Tb suitable for targeted alpha- and beta-radionuclide therapy. To evaluate these 4 radioisotopes we employed the folic acid/folate receptor (FR)-targeting strategy which has been thoroughly...
Dr
Lars Hemmingsen
(Dept. of Natural Sciences, The Royal Veterinary and Agricultural University)
18/12/2012, 12:00
Submitted
Due to the complexity of systems in living matter nuclear techniques are not commonly used in biology and biochemistry. The ISOLDE facility is, however, a perfect place for carrying out experiments with Perturbed Angular Correlation of γ-rays (PAC) spectroscopy. This well established technique is suitable for addressing different biological topics, such as metalloprotein structure, dynamics of...
Dr
Alexander Gottberg
(CERN / CENBG / CSIC)
18/12/2012, 12:20
Submitted
In August 2012 β-NMR spectroscopy was successfully applied for the world’s first experiments on liquid samples - an achievement which opens new avenues of research in the fields of wet chemistry and biochemistry. This project was motivated by the need for finding a new experimental approach to directly study biologically highly relevant metal ions, such as: Mg(II), Cu(I), Ca(II), and Zn(II)....
Friedhelm Ames
(T)
18/12/2012, 14:00
Invited
At the ISAC facility at TRIUMF radioactive ions are produced by bombarding solid targets with 500 MeV protons from a cyclotron. With a proton beam current up to 100 micro Amps it is the ISOL facility with the highest beam power of the primary beam so far. The facility is operational for more than 10 years and a wide range of different target materials have been used combined with surface,...
Tania Mendonca
(CERN, EN-STI-RBS Div. 1211 Geneva 23, Switzerland)
18/12/2012, 14:30
Submitted
The isotope pair 6He/18Ne has been suggested as the baseline isotopes for the Beta beams project [1]. The production of these isotopes has been studied within the EURISOL-DS project, where a top-down approach provided the need for the production of about 6x10^13 6He and 1x10^13 18Ne per second which would lead to rates of 2.9x10^19 anti-νe and 1.1x10^19 νe over a running period of 2 and 8...
Matthias Kronberger
18/12/2012, 14:40
Invited
The Target & Ion Source Development program (TISD) at CERN-ISOLDE aims at developing novel target materials and ion source concepts in order to provide beams that were not accessible previously in sufficient intensities at ISOLDE. During this running period, tests of a novel neutron converter design, nanocrystalline UCx and CaO targets, a liquid salt target, and a Helicon-type rf powered ion...
Mr
Sven Richter
(Johannes-Gutenberg-Universitaet Mainz (DE))
18/12/2012, 14:50
Submitted
Today the Resonant Ionization Laser Ion Source (RILIS) has developed to become the preeminent technique for production of rare isotopes, being interfaced to different kind of ISOLDE targets. Striking advantages are its universality, high ionization efficiency and unsurpassed elemental selectivity. Unavoidable surface ionization processes on the hot cavity surfaces of the ion source produce...
Hans Toshihide Tornqvist
(CERN)
18/12/2012, 15:10
Submitted
Spin-polarized nuclei are of great interest in many fields of physics, for example in nuclear structure, solid state and bio-physics. To reach this wide range of applications, an in-flight polarization technique based on the passage of ions through thin tilted foils has been investigated. This technique allows a beam of any non-zero spin nucleus to be polarized and post-accelerated. An...
Bjorn Jonson
(Institute of Theoretical Physics)
18/12/2012, 16:00
The ISOLDE Facility at the CERN SC was closed in connection with the shut-down of the CERN SC on December 19, 1990 after about 23 years of operation. ISOLDE was given the opportunity to continue its activity in an external beam from the PS Booster. The new ISOLDE PSB Facility was inaugurated in the end of May 1992 after less than 18 months of construction. Very fast the scientific programme...
Prof.
Vittorio Palladino
(Universita e INFN (IT))
18/12/2012, 17:30
The talk will provide a snapshot today, after 14 years of
discoveries:
a) The evidence, from 1998 on, of a first "atmospheric" transition
wavelenght with essentially maximal mixing, dominated by muon to tau neutrino transitions.
b) The evidence, soon after, of a second larger "solar" wavelenght again with large, thou not maximal, mixing.
c) The rapid progress of accurate measurements of...
Prof.
Purushottam Chakraborty
(Saha Institute of Nuclear Physics)
19/12/2012, 09:00
Invited
Excellent detection sensitivity, high dynamic range and good depth resolution make the secondary ion mass spectrometry (SIMS) extremely powerful for the analysis of surfaces and interfaces of materials. However, a serious problem in SIMS analysis is its ‘‘matrix effect’’ that hinders the materials quantification. Realistic SIMS quantification having analytical accuracy better than ±20%...
Karl Johnston
(Universitaet des Saarlandes (DE))
19/12/2012, 09:30
Submitted
ZnO doped with 3d-metal impurities has been of scientific interest since the suggestion that it could be a magnetic semiconductor with applications in spintronics [1]. Since then, inconsistent reports on the presence of dilute magnetism have been published, with only few reports using local atomic probe methods such as Mössbauer spectroscopy. In our previous work utilizing emission Mössbauer...
Dr
Lino M. C. Pereira
(Instituut voor Kern- en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium.)
19/12/2012, 09:45
Submitted
The coexistence of semiconducting behavior and ferromagnetic order in dilute magnetic semiconductors (DMS) continue to challenge our understanding of condensed matter [1,2]. For a given impurity-host combination, the electrical and magnetic properties are largely determined by the lattice sites occupied by the dopant atoms. The canonical example is Mn-doped GaAs (narrow-gap), where...
Manfred Deicher
(Experimentalphysik, Universität des Saarlandes, 66123 Saarbrücken, Germany)
19/12/2012, 10:05
Submitted
Radiotracer experiments are the most sensitive tool for the study of diffusion phenomena in solids. At ISOLDE/CERN diffusion experiments have been performed using the unique diversity of radiotracers delivered for implantation by ISOLDE.
It has been shown that in CdTe the group I elements Cu, Ag, Au, and Na can exhibit the phenomenon of uphill diffusion, which under suitable conditions...
Juliana Marques Ramos
(University of São Paulo)
19/12/2012, 10:20
Submitted
Fe-doped thin films of the semiconductors SnO2 and TiO2 have been measured by means of the perturbed angular correlation spectroscopy (PAC) in order to investigate the ferromagnetism and to study the electric quadrupole interactions. Important technological applications of these oxides [1,2], especially as candidates for diluted magnetic semiconductor [3] in the emerging area of...
Jose Javier Valiente Dobon
(LNL (INFN))
19/12/2012, 11:00
Invited
The European project AGATA is the result of a combined effort of many different countries and institutions to serve the future needs of the challenging experiments at new radioactive ion beam facilities. The new concept of the gamma-ray tracking spectrometer AGATA bases its excellences in being capable of identifying the gamma interaction points (pulse shape analysis) and via software in...
Tomica Porobic
(Katholieke Universiteit Leuven (BE))
19/12/2012, 11:30
Submitted
One of the goals of precision measurements in nuclear beta-decay is searching for deviations from the Standard Model that could point to new physics. The primary aim of WITCH experiment [1] at the ISOLDE/CERN facility is the search for a scalar interaction in beta-decay by a precise (0.5%) determination of the beta-neutrino angular correlation coefficient, a, which would constrain a possible...
Michael Thurauf
(Technische Universitaet Darmstadt (DE))
19/12/2012, 11:50
Submitted
The transistion strengths of excited low-lying states serve as a sensitive testcase for theoretical models, such as the nuclear shell model. In the region around the doubly magic nucleus 132Sn experimental data on transition strengths and, thereby, lifetimes of the excited states are scarce. To improve the experimental situation, we determined the lifetimes of the first 2+ states in 140Ba [1]...
Dr
Dhruba Gupta
(Bose Institute)
19/12/2012, 12:10
Submitted
A nuclear physics solution is searched to resolve the 7Li abundance anomaly in the cosmos. The enhancement of nuclear reaction rates by nuclear resonances plays a vital role in nuclear astrophysics. The existing contradiction between theory and observation demands more study on the resonances in 7Be(d,d) and 7Be(d,p) reactions, before invoking physics beyond the standard Big Bang Nucleosynthesis.
Prof.
Robert Wadsworth
(University of York)
19/12/2012, 12:20
Submitted
The study of transfer reactions in inverse kinematics with radioactive beams will be a centrepiece of the programme once HIE-ISOLDE commences operation in a few years' time. There are several different approaches to such studies including the use of silicon arrays like T-REX and SHARC. An alternative is to use a solenoidal spectrometer such as HELIOS at Argonne National Laboratory. In this...
Francesca Giacoppo
(University of Oslo)
19/12/2012, 12:30
Submitted
F. Giacoppo1, L. Bernstein2, D. Bleuel2, P.A.Butler3, T. K. Eriksen1, A. Görgen1, M. Guttormsen1, T. W. Hagen1, A.C. Larsen1, H. T. Nyhus1, T. Renstrøm1, S. Rose1, S. Siem1, G.M. Tveten1, A.Voinov4, M. Wiedeking5, and J. Wilson6
1Department of Physics, University of Oslo, N-0316 Oslo, Norway
2Lawrence Livermore National Laboratory, USA
3Oliver Lodge Laboratory, University of Liverpool,...
Dr
Magdalena Kowalska
(CERN)
19/12/2012, 13:40
Submitted
The HIE-ISOLDE project has met with large enthusiasm from the physics community. This is because the higher energy will allow nuclear reactions such as transfer and fusion for the first time for many exotic nuclear species, while the quality and intensity upgrades will give access to beams which could not be studied before.
In June 2010 the INTC committee has received 34 HIE-ISOLDE Letters...
Walter Venturini Delsolaro
(CERN)
19/12/2012, 14:10
The high beta accelerating cavity for the HIE ISOLDE linac is based on the Nb sputtering on copper technology pioneered at CERN for LEP2 and which was further adapted to the QWR shape in INFN-LNL in Italy. The specifications for the cavity performance are challenging, calling for 6 MV/m accelerating field and Q0 of 4.7 108, i.e. at 10 W dissipated power. A development program was launched at...
Erwin Siesling
(CERN)
19/12/2012, 14:30
Invited
Those of you familiar with the Isolde facility surely noticed the two new buildings that arose on the east side of the Isolde experimental hall. They will house the services and infrastructure necessary for the new superconductive HIE Linac such as cooling, ventilation and cryogenics as well as the RF and other subsystems. The HIE Linac itself and the High Energy Beam Transferline in the...
Andreas Goergen
(University of Oslo)
19/12/2012, 15:40
Submitted
The open-shell nuclei with Z>50 and N<82 are predicted to have the largest ground-state deformation in the entire nuclear chart. The shapes are predicted to be prolate except for a small region of nuclei with Z>60 and N≈78, which are predicted to be oblate. Similar to the situation in Hg and Pb isotopes at neutron mid-shell, prolate and oblate shapes can be expected to lie close in energy for...
Prof.
Alexandrina Petrovici
(IFIN-HH)
19/12/2012, 16:00
Submitted
The structure of neutron-rich nuclei in the A~100 mass region
relevant for the astrophysical r-process manifests drastic changes in some isotopic chains and often sudden variations of particular
nuclear properties have been identified. For a realistic description of the evolution in structure with increasing spin, energy, and isospin determined by shape coexistence and mixing...
Emmanuel Clement
(GANIL)
19/12/2012, 16:20
Submitted
The IS451 experiment aims to investigate the shape transition at N=60 in the n-rich Sr isotopes by safe Coulomb excitation at the Miniball setup using REX. In 2007, we have investigated the N=58 nearly spherical Sr96 using a molecular extraction within an UCx primary target. A second run in 2011 focussed on the highly deformed isotopes 98Sr using at that time in-trap and in-EBIS beta decay to...
Jose Antonio Briz Monago
(Consejo Superior de Investigaciones Cientificas (CSIC) (ES))
19/12/2012, 16:40
Submitted
The N=Z nucleus 72Kr is situated in the mass region A≈70-80, where phenomena such as shape coexistence [1,2] and possibly also np pairing effects can show up. From the astrophysical point of view, 72Kr is involved in the rp-process of stellar nucleosynthesis being a waiting point nucleus as 73Rb, next step in the one proton capture, is unbound and there is a competition between the two proton...
David Lunney
(CSNSM Centre de Spectrometrie Nucle aire et de Spectrometrie de)
19/12/2012, 17:00
It’s not just a coincidence that dramatic changes in nuclear deformation occur over just a few nucleons in the middle of a region defined by proton and neutron shell closures. Some of the most sudden and intense shape transitions on the chart occur in the A = 100 region bounded by the Z = 28 and 50 proton closed shells and the N = 50 and
82 neutron closed shells. These rambunctious nuclides...
