Micha Hass
(Weizmann Institute of Science)
06/02/2006, 14:10
Since the discovery of parity violation in beta decay, Parity Non-Conservation (PNC)
in bound nuclei has provided a means to address the parity violating term in the
nuclear Hamiltonian due to the weak interaction component. The few cases identified
as promising ones have been studied but showed marginal or no effects.
In the case of 180Hf(8-) isomer, the PNC effect was studied nearly...
Prof.
Alfredo Poves
(Departamento de Fisica Teorica, Universidad Autonoma de Madrid)
06/02/2006, 14:40
I will discuss the present status of the theoretical description
of very neutron rich nuclei with particular emphasis in the subshell
closures at N=20, 28, 32 and 34.
Dr
Wilfried Nörtershäuser
(University of Mainz)
06/02/2006, 16:00
A measurement of the optical isotope shift in beryllium isotopes will allow a
model-independent determination of the nuclear charge radius of Be-7,9,10 and the
halo nucleus Be-11. This is based on an accurate calculation of the mass-dependent
part of the isotope shift in the respective transition, combined with a precise
measurement of the total isotope shift. Both values must be...
Dr
Alexander Herlert
(European Organization for Nuclear Research (CERN))
06/02/2006, 16:20
Nucleosynthesis theory describes how elements and nuclides are formed in stellar
evolution, e.g., violent processes like supernovae explosions. For the calculations
of the various pathways from hydrogen to the heavier elements the nuclear properties
of a large number of nuclides need to be known [1,2]. Especially in the case of the
r-process, where elements heavier than iron are formed by...
Mr
Sam Coeck
(IKS, KULeuven)
06/02/2006, 16:40
During the last year, efforts were made to improve and understand in more detail the
WITCH experimental setup. At the end of 2004 several problems were uncovered and a
number of them have already been dealt with in detail.
The MCP's used for tuning the ion beam in the setup where shown to have saturation
effects but this problem is now understood and can be prevented.
The behavior of...
Mr
Sebastian George
(GSI)
06/02/2006, 17:00
The mass is a fundamental property of a nuclide. Its measurement contributes to a
variety of fundamental studies including tests of the Standard Model and the weak
interaction. The limits of mass measurements of exotic nuclei have been extended
considerably by improving and developing the Penning trap mass spectrometer ISOLTRAP
at the ISOLDE facility at CERN. The mass resolving power...
Dr
Amine Cassimi
(Ciril-Ganil)
06/02/2006, 17:20
At LPC Caen, a magnetic optical trap (MOT) has been developed for the trapping of
Rb atoms. This device is a powerful tool for atomic physics studies when used in
combination with the well-established Recoil Ion Mass Spectrometry method
(MOTRIMS). At ISOLDE, this kind of trap could be used for the trapping of
radioactive Rb, and possibly of radioactive K and Li atoms with a slightly...
Dr
Giulio Stancari
(INFN Ferrara)
06/02/2006, 17:35
A facility for the study of francium atoms is operating at the INFN Laboratories in Legnaro (LNL). Data on
production, transport and trapping is presented. Possible future developments at Legnaro and ISOLDE are
discussed.
Dr
Karsten Riisager
(CERN)
07/02/2006, 09:00
ISOLDE users can since 2005 benefit from the transnational
access program through EURONS (EC FP6). A few important
practical points will be summarized.
Prof.
Yorick Blumenfeld
(IPNO)
07/02/2006, 09:10
The availability of radioactive beams at GANIL produced
through both the projectile fragmentation (SISSI) and ISOL (SPIRAL)
techniques have fostered the development of a broad programme of reaction
studies. The subject will be illustrated with results from elastic,
inelastic, transfer and fusion studies. Topics will include the influence
of weakly bound neutrons on direct and compound...
Dr
Magdalena Gorska
(GSI Darmstadt)
07/02/2006, 09:40
Nuclear structure studies at GSI gained recently an increased interest for the
present activities as well as for the future project FAIR. A broad range of
physical phenomena can be addressed by high-resolution in-beam γ-ray spectroscopy
measurements with radioactive beams offered within the Rare ISotopes INvestigation
at GSI (RISING) project. It combines the EUROBALL Ge-Cluster...
Dr
Alison Laird
(University of York)
07/02/2006, 10:10
The TUDA facility (TRIUMF UK Detector Array) consists of a silicon strip array for
the study of charged particle reactions of astrophysical interest in inverse
kinematics. TUDA addresses the challenges presented by investigating such
reactions, using both direct and indirect techniques. In particular, the low
energies and low cross sections involved require the use of highly...
Prof.
Magne Guttormsen
(Department of Physics, University of Oslo, Norway)
07/02/2006, 11:00
Atomic nuclei at low excitation energy are characterized by the motion of pairs of nucleons, known as Cooper
pairs, moving in time reversed orbitals. This picture becomes much more complicated as Cooper pairs are
broken by collective (Coriolis force) or intrinsic (temperature) excitations. In this talk we will focus on the
statistical properties of the system as function of the number of...
Brigitte Roussiere
(Institut de Physique Nucléaire)
07/02/2006, 11:30
Laser spectroscopy gives access to fundamental properties of the ground and rather
long-lived isomeric states such as the change in the mean square charge radius (
) and the nuclear moments. Measurements on tellurium isotopes (Z = 52) can provide
reliable information on the shape of nuclei, structure of states, and effects of
dynamics. Indeed from A = 115 to 133, all the odd-A Te...
Anatoly Barzakh
(Petersburg Nuclear Physics Institute)
07/02/2006, 12:15
The laser ion source has been used for the study of the isotope shifts of neutron
deficient Eu and Gd isotopes at the IRIS facility. The region of the applicability
of the method by using the gamma- and beta- radiation detection has been extended.
The isotope shifts of the europium optical line 576.520 nm for 137–139, 141, 142m,
143, 144 Eu and the gadolinium optical line 569.622 nm...
Mr
Miguel Madurga Flores
(Consejo Superior de Investigaciones Cientificas (CSIC))
07/02/2006, 12:35
Light nuclei near the neutron drip-line have been studied intensively since the
discovery
of halos in this region. The complexity of their decays represent a great task for both
theoretical and experimental nuclear physics. The 11Li, the nucleus studied in this work,
exhibit a complex beta decay. The high Q-beta value (20.6 MeV) and the low nucleon
binding energy
in the neighbour...
Didier Voulot
(Ludwig-Maximilians-Universitat Munchen)
07/02/2006, 14:45
Operation and development in 2005:
REX- ISOLDE (the radioactive beam experiment at ISOLDE) has now been approved as a
CERN facility. A number of tasks are underway to improve its operation and
reliability. Already 2005 has been a very successful campaign with a record number
of RIBs accelerated and delivered to the two experimental targets: 15 different
isotopes have been accelerated...
Dr
Pierre Delahaye
(CERN ISOLDE)
07/02/2006, 15:05
At ISOLDE, different charge breeding techniques are investigated with both an EBIS
and an ECR charge breeder. The REXEBIS is an operational machine since three years,
running as the central part of the beam preparation stage of the REX-ISOLDE post-
accelerator. A 14 GHz Phoenix ECR charge breeder is currently being tested in one
of the beam line of the General Purpose Separator (GPS)....
Mr
Ivan Podadera Aliseda
(CERN)
07/02/2006, 15:45
A new Radio Frequency Quadrupole ion Cooler and Buncher (RFQCB) has been designed
and manufactured at ISOLDE for the installation after the High Resolution Separator
(HRS) as a quasi-permanent beam line element, to deliver cooled and bunched
Radioactive Ion Beams (RIBs) with an enhanced optical beam quality beam to most of
the ISOLDE experiments. In this contribution the key parts and...
Dr
Ulrich Wahl
(Instituto Tecnologico e Nuclear ITN)
07/02/2006, 16:25
Solid state physics at ISOLDE aims at the study of the structural, electrical,
optical, magnetic and transport properties related to impurities in a variety of
technologically and fundamentally relevant materials, including semiconductors,
metals, high-Tc superconductors and ceramic oxides.
This talk will give an overview on the recent ISOLDE activities in this field,
including
-...
Vitor Amaral
(Universidade de Aveiro, Portugal)
07/02/2006, 16:55
The Pr1-xCaxMnO3 displays a variety of phase transitions associated with the spin,
lattice, charge and orbital degrees of freedom [1],[2]. PrMnO3 and CaMnO3 are
antifeerromagnetic, and low doped (x<0.32) samples are ferromagnetic below Tc~130K.
For 0.32<x<0.90 the system presents a robust Charge Order state (CO) for
temperatures below TCO~150-235 K and an antiferromagnetic insulator...
A.C. Marques
(Centro de Física Nuclear da Universidade de Lisboa, Portugal)
07/02/2006, 17:15
Strontium-titanate is a perovskite ceramic material, which is of interest, e.g.,
for future devices based on metal-oxide Si heterostructures such as high-k field
effect transistors. The electrical, optical and magnetic properties of SrTiO3 can
be modified by the incorporation of dopants. For instance, transition metal doped
SrTiO3 has been considered as a candidate for a...
T. M. Mendonça
(Dep. Física, Instituto Tecnológico e Nuclear E.N. 10, P - 2686-953 Sacavém)
07/02/2006, 17:35
We present a progress report of lattice sites and collective ordering studies of
dopant oxygen atoms in HgBa2CaCu2O6.26 (Hg1212) samples with the perturbed angular
correlation technique, PAC. By measuring electric field gradients (EFG) at 199mHg
nuclei, information for characterizing the oxygen atoms, Oδ, which go to the Hg-
planes and dope the superconducting CuO2 planes with...
Frank Wagner
(Technische Physik, Universität des Saarlandes, D-66041 Saarbrücken, Germany)
07/02/2006, 17:50
Understanding and control of diffusion profiles of intrinsic and extrinsic defects in
semiconductors is of central importance for developing electronic and optoelectronic
devices. Common to all diffusion profiles in semiconductors reported so far is the
monotonously decreasing depth profile if the source of the diffusing species is
located at the surface of the crystal. In compound...
Dr
Irina Stefanescu
(IKS Leuven, KULeuven)
08/02/2006, 09:00
Levels of (6,3,4,5)- multiplet in 68,70Cu were populated by Coulomb excitation
using 6- radioactive beams delivered by REX-ISOLDE. B(E2)/B(M1) reduced transition
probabilties can be extracted and information about the single particle structure
of the multiplet can be obtained.
Prof.
Karl-Heinz Speidel
(Helmholtz-Institut für Strahlen- und Kernphysik, Univ. Bonn)
08/02/2006, 09:25
In recent measurements of g factors and lifetimes of short-lived nuclear states
several radioactive nuclei have been investigated which were produced in
alpha-transfer reactions to stable projectiles at the Coulomb barrier employing the
techniques of transient magnetic fields and Doppler-Shift-Attenuation, respectively.
In particular, this method has been applied to 44Ti [1], 52Ti [2],...
T. Behrens
(Physics Department E12, TU München)
08/02/2006, 09:45
Recent studies on isotopes around the shell closure N=82 have shown that despite
decreasing excitation energies the B(E2) values of Sn and Te isotopes above
N=82 are lower than expected. The aim of our experiment was to measure B(E2) values
in neutron-rich even-even isotopes around the double magic 132Sn. In a first campaign
in 2004 we measured the gamma transitions of 122-126Cd. In 2005...
Andreas Goergen
(DAPNIA/SPhN, CEA Saclay)
08/02/2006, 10:05
Shape-coexisting states in neutron-deficient krypton isotopes
have been studied by low-energy multi-step Coulomb excitation
of radioactive 74Kr and 76Kr beams at GANIL. States up to the
8+ in the ground-state band and several non-yrast states have
been populated, and their excitation probability was measured
as a function of the scattering angle. A large set of both
transitional and...
Dr
Georgi Georgiev
(IPNO)
08/02/2006, 10:25
The nuclear moments are an important ingredient of our nuclear structure
knowledge. Their contribution is crucial when one discusses the
development of the nuclear shells far from stability. However, presently
there are no techniques that can be directly applied for the studies of
short-lived isomeric states produced by ISOL beams. Some ideas about the
use of post-accelerated radioactive...
Ulli Koester
(CERN)
08/02/2006, 11:25
Off- and on-line experiments within the TARGISOL project will be presented and
resulting recent and future improvements of ISOLDE beams will be discussed.
Dr
Dorothea Schumann
(Paul Scherrer Institute)
08/02/2006, 11:45
Exotic radionuclides such as for instance 44-Ti, 60-Fe, 26-Al, 10-Be and many others
are of great interest in several research domains like astrophysics, nuclear
medicine, geophysics, fundamental nuclear physics or radioactive beam facilities.
The production of all these nuclides in sufficient amounts is very time consuming
and extremely expensive. Conventional techniques in commercial...
Mr
Martin Eller
(Technische Universitaet Wien (TU))
08/02/2006, 12:05
Diverse data, such as yields, release curves or target ageing, have been collected
for the last fifteen years at ISOLDE. We are now improving the procedure for their
acquisition, storage and access. The measurements will be performed by an automatic
application that controls the hardware settings and record data according to
predefined parameters. A dedicated database with different...
Dr
Manuela Turrion Nieves
(Inst. de Estructura de la Materia)
08/02/2006, 12:20
An accurate value of yields is essential for the preparation of
experimental proposals for the ISOLDE facility as well as for the
success of the experiments themselves. After the adjustment of the
target and ion source the ISOLDE technical group provides a first
estimation of the measured yield, but in many cases the measurement of
the yield in the experimental set-ups is required....
Prof.
Reiner Krücken
(Physik Department E12 - Technische Universität München)
08/02/2006, 14:00
Two-neutron transfer reactions offer the possibility to study pairing correlations,
shape coexistence and other strcutural issues in nuclei. Our recent development of a
tritium target opens the possibility to perform (t,p) reactions in inverse kinematics
at REX-ISOLDE with beam intensities as low as approx. 10^5 pps. In this talk I will
report on results of recent transfer experiments in...
Serge Franchoo
(Institut de Physique Nucleaire (IPN))
08/02/2006, 14:30
The replacement of the N=20 spherical shell gap in nuclei of the island of inversion
by the N=14,16 gaps can be explained by the tensor monopole interaction between the
proton and neutron Fermi levels. The next step in understanding the evolution of
shell structure is to measure the strengh of this interaction, which is present
throughout the nuclear chart. The ideal tool for this are...
Vinzenz Bildstein
(Physik-Department E12, TU München)
08/02/2006, 14:50
Transfer reactions yield important spectroscopic information about isotopes,
including spin and parity assignments to nuclear levels and spectroscopic factors.
The corresponding information is still lacking for many nuclei far from stability.
The results from transfer experiments with neutron rich Na and Mg isotopes in inverse
kinematic with the MINIBALL setup at REX-ISOLDE will be...
Henrik Jeppesen
(European Organization for Nuclear Research (CERN))
08/02/2006, 15:10
In the second half of 2005 the Aarhus-Gothenburg-Madrid collaboration performed two
different experiments impinging 11Be and 9Li on deuterium targets to study transfer
reactions to different final states.
This type of transfer reactions (at 2-3 Mev/u) gives information on several systems
since both elastic scattering, stripping and pick-up channels are open.
I would therefore like to...
Mr
Aaron Hurst
(Liverpool University)
08/02/2006, 15:30
There is much ongoing experimental and theoretical interest
surrounding nuclei in the $A=70$ region of the nuclear chart. A
definitive measurement of the reorientation matrix element of the
first 2+ state in 70Se would provide information on the
nature of shape coexistence in this nucleus. Preliminary results
following the Coulomb excitation of a radioactive beam of 70Se at
2.94 MeV/u...
Prof.
John D'Auria
(Simon Fraser University)
08/02/2006, 16:40
This project involves two main components, namely the development of a ISOLDE
production target (or targets) for the release of short-lived proton and/or neutron-
rich aluminum isotopes, and to subsequently to use such beams, e.g. 25,26mAl to
initiate a program in nuclear astrophysics using REX-ISOLDE involving particle
transfer reactions and elastic/inelastic scattering reactions. Of...
Dr
Sotirios Harissopulos
(Institute of Nuclear Physics, NCSR "Demokritos")
08/02/2006, 17:10
The origin in the cosmos of the so-called p nuclei is one of the most puzzling
tasks to be solved by any model of heavy-element nucleosynthesis. These nuclei are
by-passed by the s- and r-process pathways. To date, these nuclei have been
observed only in the solar system. Understanding the synthesis of these p-process
nuclei on the basis of astrophysical processes occurring outside the...