Prof.
Alfredo Poves
(Departamento de Física Teórica and IFT, UAM-CSIC, Universidad Autónoma de Madrid, Spain, USIAS Fellow of the Université de Strasbourg at the IPHC.)
12/2/15, 9:10 AM
I shall discuss the meaning of the "nuclear shape" in the laboratory frame
proper to the Spherical Shell Model.
Shape coexistence, shape mixing and shape entanglement will
be described in relevant physics cases, either
neutron rich at the N=20-28 and 40-50 Islands of Inversion,
or neutron deficient in the N=Z=40 region.
Karsten Riisager
(Aarhus University (DK))
12/2/15, 9:40 AM
Submitted
In many beta-delayed particle decays in light nuclei one observes broad features in the particle spectra that typically are interpreted as decays through broad resonances. I shall discuss this interpretation along with the alternative interpretation of the decay as proceeding directly to the continuum. Guidelines for when a decay belongs in one or the other category will be given, but there is...
Jens Dilling
(triumf/UBC)
12/2/15, 10:00 AM
Submitted
The science program at TRIUMF for ISAC and ARIEL will be presented, including science highlights
and status and plans for the upcoming ARIEL facility. Once ARIEL is operational, three parallel radioactive beams will be available for users, coming from both electron and proton induced reactions.
Nico Orce
(University of the Western Cape)
12/2/15, 10:20 AM
Submitted
New polarization potentials will be presented based on: 1) the latest photo-neutron cross section
evaluation and a missing factor of two in previous work, and 2) the mass dependency of the symmetry energy, $a_{sym}(A)$. The magnitude of the first one is 35% stronger than the currently accepted polarization potential. The second one opens up the possibility for a parameter-free polarization...
Dimiter Balabanski
(ELI-NP, IFIN-HH)
12/2/15, 12:10 PM
Submitted
The possibilities for photofission experiments at the new ELI-NP facility will be discussed. At ELI-NP, high power laser systems together with a very brilliant gamma beam are the main research tools [1-3]. The status of the project will be reported. The $\gamma$-beam system and the expected performance of the electron accelerator and the production lasers will be discussed. The targeted...
Magdalena Zielinska
(CEA Saclay)
12/2/15, 12:30 PM
Submitted
Neutron rich 96,98Sr isotopes were investigated by safe Coulomb excitation of radioactive beams at the REX-ISOLDE facility. Reduced transition probabilities and spectroscopic quadrupole moments have been extracted from the differential Coulomb excitation cross
sections. These results allow for the first time to draw definite conclusions about the shape coexistence of highly deformed prolate...
victor zamfir
(National Institute of Physics and Nuclear Engineering)
12/2/15, 2:10 PM
Invited
The new Research Center ELI-NP is under construction in Bucharest-Magurele, Romania. It is meant as a unique research facility to investigate the impact of very intense electromagnetic radiation (Extreme Light) on matter with specific focus on nuclear phenomena and their applications. The extreme light is realized at ELI-NP in two ways: by very high optical laser intensities up to 1023 W/cm2...
Giacomo De Angelis
(Universita e INFN (IT))
12/2/15, 2:40 PM
Invited
Magic numbers are a key feature in finite systems of Fermions since they are strongly related to the underlying mean field. The evolution of the shells far from stability can be linked to the shape and symmetry of the nuclear mean field. The study of nuclei with large neutron/proton ratio allow to probe the density dependence of the effective interaction. Changes of the nuclear density and...
Prof.
Guy Savard
(Argonne National Laboratory)
12/2/15, 3:10 PM
Invited
CARIBU (CAlifornium Rare Ion Breeder Upgrade) is a new source for neutron-rich short-lived isotopes that can be used for experiments directly with low energy beams or at Coulomb barrier energy after post-acceleration through the ATLAS superconducting linac located at Argonne National Laboratory. CARIBU uses a novel gas catcher based system to make available isotopes of all species produced by...
Georgi Georgiev
(CSNSM)
12/2/15, 3:40 PM
Invited
ALTO is an international facility that provides in parallel stable and radioactive beams. The stable beam experiments are based on the operation of a 15 MV Tandem that can accelerate species from hydrogen up to iodine as well as clusters (C, Au …). The low-energy radioactive beams are produced using the photo-fission of UCx target. The experiments performed cover a large physics case from...
Bertram Blank
(CEN Bordeaux-Gradignan)
12/2/15, 4:40 PM
Nuclear beta decay transforms up quarks in down quarks and vice versa. Therefore, high-precision measurements of beta decay allows under certain conditions to test the standard model of weak interaction. In particular, the conserved vector current (CVC) hypothesis can be tested and the Vud element of the CKM quark mixing matrix can be determined. For this purpose, high-precision data for 0+ -...
Miguel Madurga Flores
(CERN)
12/2/15, 5:10 PM
The investigation of isotopes far from stability provides a substantial test of our understanding of the forces involved in organizing nuclear matter. Ground state properties, such as its mass or spin parity, and beta-decay properties, like the half-life or the neutron branching ratio are the typical observables that must be correctly reproduced to trust a nuclear theory calculation. In...
Andrea GOTTARDO
(CNRS)
12/2/15, 5:40 PM
Submitted
In neutron-rich nuclei, especially near shell-closures, the increasing
Q-value of beta decays and the lowering of the neutron-separation
threshold, lead to the dominance of beta-delayed neutron emission as
decay mode. At the same time, Q-values well above 10 MeV provide the
possibility to study highly-excited particle-hole states populated by
the GT decay.
A measurement was...
Dr
Loredana (for the ECHo Collaboration) Gastaldo
(Kirchhoff-Institute for Physics, Heidelberg University)
12/2/15, 6:00 PM
Submitted
The Electron Capture in Ho-163 experiment, ECHo is designed to investigate the electron neutrino mass in the sub-eV region using high-precision measurements of the Ho-163 electron capture spectrum. The very good results obtained from the first prototypes of metallic magnetic calorimeters with ion-implanted Ho-163, among which the calorimetric measurement of the Ho-163 spectrum with the best...
Swapan K. Saha
(Bose Institute)
12/2/15, 6:20 PM
Poster
Radiative capture cross sections at astrophysical energies are difficult to measure directly. The time reversed Coulomb breakup reaction may be used in such cases. Thus the Coulomb breakup of $^7$Be, preferably in the presence of heavy targets can be used to measure the production cross section of $^7$Be by $^3$He + $^4$He → $^7$Be + $\gamma$. This would enable measurements at low relative...
Hilary Masenda
(University of the Witwatersrand)
12/2/15, 6:20 PM
Poster
The lattice sites and valence states of Fe ions in InN were investigated by emission Mössbauer spectroscopy following the implantation of radioactive 57Mn+ ions at ISOLDE/CERN, stimulated by reports of ferromagnetic effects observed in virgin InN [1] and also when doped with 3d transition metals [2]. Angle dependent measurements performed at room temperature on the 14.4 keV γ-rays from the...
Dr
Joao Martins Correia
(Instituto Superior Tecnico (PT)), Dr
Juliana Schell
(Universität des Saarlandes (DE), ISOLDE-CERN)
12/2/15, 6:20 PM
Poster
The study of the Fleischmann and Pons Effect (FPE) i.e. the excess power production during electrochemical loading of deuterium in palladium has a multidisciplinary character. Correlations between the material status and the occurrence of the effect as well as some changing of the electrochemical interface status have been observed. During the last two decades the phenomenon was observed, well...
Abel Eduardo Da Silva Fenta
(University of Aveiro (PT))
12/2/15, 6:20 PM
Poster
The one-atom-thick crystal - graphene, uniquely combines extreme mechanical strength, exceptionally high electronic and thermal conductivities, as well as many other exotic properties, all of which make it highly interesting for fundamental physics and numerous applications. Its properties strongly depend on surface and interface nanoscale interactions, where new physical models should apply...
Katerina Chrysalidis
(Johannes-Gutenberg-Universitaet Mainz (DE))
12/2/15, 6:20 PM
Poster
The Resonance Ionization Laser Ion Source (RILIS) is the principle ionization technique for radioactive beam production at ISOLDE. It is based on multi-step laser resonance excitation and ionization of atomic species and is typically applied inside the hot cavity of the ISOLDE target and ion source assembly. To enable efficient laser ionization for additional elements, optimal ionization...
Angelo Rafael Granadeiro Costa
(Instituto Superior Tecnico (PT))
12/2/15, 6:20 PM
Poster
SiC is a wide band gap semiconductor with an increasing number of applications in high-temperature electronics. Similar to Si, transition metals (TMs) in SiC are the source of deep levels in the band gap, however, the knowledge on structural properties of TMs in SiC, such as possible lattice sites, is much less advanced.
In this work we report first results on the lattice site location of...
Marcelo Baptista Barbosa
(Universidade do Porto (PT))
12/2/15, 6:20 PM
Poster
Gallium oxide (Ga2O3) belongs to the family of transparent conductive oxides, electrically conductive materials that are optically transparent. These materials have been widely studied due to their technological applicability, and Ga2O3, having the widest band-gap among them (4.8 eV), is a very interesting material for photonic applications working in the visible and UV wavelength...
Numa Abdulmaeen S Althubiti
(University of Manchester (GB))
12/2/15, 6:20 PM
Poster
In this work neutron-deficient isotopes 195(g,m)Po and 197(g,m)Po have been investigated by using high-precision Penning-trap mass spectrometry at ISOLTRAP [1]. In addition, decay measurements on these isotopes were performed with the assistance of ISOLTRAP’s multi-reflection time-of-flight mass spectrometer (MR-TOF MS) [2], which successfully enabled us to deliver an isobarically pure beam...
Andree Welker
(Technische Universitaet Dresden (DE))
12/2/15, 6:20 PM
Poster
We present very recent ISOLTRAP [1, 2] measurements of neutron rich copper isotopes, where – with the help of the multi-reflection time-of-flight mass spectrometer – $^{79}$Cu was reached for the first time. Having only one proton above the $Z = 28$ core, the binding energies of the copper isotopes are sensitive to the evolution of nuclear shell structure close to the doubly-magic $^{78}$Ni...
Abel Eduardo Da Silva Fenta
(University of Aveiro (PT))
12/2/15, 6:20 PM
Poster
Perturbed angular correlation (PAC) spectroscopy experiments were used to study the adhesion of toxic heavy metal ions in aqueous solution to magnetic nanoparticles, to understand the structures and optimum trapping conditions in solutions (water and nitrate). In this work we analyze the results of the radioactive mercury and cadmium isotopes available for PAC, which were implanted in ice. The...
Gregory James Farooq-Smith
(University of Manchester (GB))
12/2/15, 6:20 PM
Poster
ISOLDE Workshop 2015
G. J. Farooq-Smith on behalf of the CRIS collaboration
Exotic isotopes of francium with yields as low as 100 ions/second have been examined with high efficiency and low background at the CRIS experiment, by the coupling of collinear laser and resonance ionisation spectroscopy techniques [1]. In addition, pure state beams have been examined even in the midst of...
Dr
Christophe Olivier Sotty
("Horia Hulubei" National Institute for Physics and Nuclear Engineering, 077125 Bucharest-Magurele, Romania)
12/2/15, 6:20 PM
Poster
Exhibiting one of the most sudden onset of deformation, the neutron-rich A=100 mass region has recently attracted a vast interest from the nuclear structure community.
The influence of the neutron contribution to the deformation has been already well investigated in the Sr and Zr isotopes; however, a better understanding of the role played by the proton orbitals was needed to draw a...
Matthias Nagl
(Uni-Göttingen)
12/2/15, 6:20 PM
Poster
For the GLM branch of ISOLDE an ensemble of new collection chambers is currently being finished. One chamber allows rapid sample
changing by means of a load-lock system as well as tilted implantations. The second chamber will provide the possibility to
implant decelerated or post-accelerated ion beams and thus to control implantation depth. Finally, a third chamber will be
optimized for...
Dhruba Gupta
(Bose Institute (IN))
12/2/15, 6:20 PM
Poster
The destruction of the $^7$Be nucleus is immensely important in studying the $^7$Li abundance anomaly. The relevant reaction rates, particularly the destruction of $^7$Be through resonance excitation in the transfer reaction $^7$Be (d,p) $^8$Be *, need to be measured with better accuracy before one can invoke solutions beyond nuclear physics. The T-REX detector array is suitable for such...
Stavroula Pallada
(Hellenic Republic Democritus University of Thrace (GR))
12/2/15, 6:20 PM
Poster
A series of Perturbed Angular Correlation of γ-rays (PAC) experiments with Cu-68m as probe nuclei implanted in several solid-state samples were performed in November 2015 at VITO-ISOLDE at CERN. The decay scheme of Cu-68m/Cu-68 was selected in order to test the feasibility of studying the hyperfine interactions of the Cu isotope with the electromagnetic fields of the host material. Due to the...
Torben Esmann Molholt
(CERN)
12/2/15, 6:20 PM
Poster
On behalf of the VITO Collaboration, T. E. Mølholt.
The VITO (Versatile Ion-polarized Techniques Online) medium scale experiment is a modification of the existing UHV line at ISOLDE. The VITO beamline has been under construction since 2014 and is installed permanently in the low-energy part of the ISOLDE hall. When fully commissioned, the unique experimental setup will open up numerous...
Sebastian Rothe
(University of Manchester (GB))
12/3/15, 9:00 AM
Invited
The Resonance Ionization Laser Ion Source (RILIS) is the most frequently applied ion source type at ISOLDE. The RILIS method of step-wise resonance laser excitation and ionization of the nuclear reaction products, makes it both highly selective and efficient. A continuous program of technical upgrades of the laser installation, as well as research and development of the RILIS technique, is...
Joao Pedro Ramos
(Ecole Polytechnique Federale de Lausanne (CH))
12/3/15, 9:40 AM
Invited
The mission of the Target and Ion Source Development Team (TISD) at CERN-ISOLDE is to develop beams of new elements or shorter-lived isotopes. It is also to make sure that the current targets and ion sources operate with optimized settings and deliver high, pure and stable beams over time to the physics community. In this contribution, a report on the isotope yields of the uranium carbide...
Christoph Seiffert
(Technische Universitaet Darmstadt (DE))
12/3/15, 9:55 AM
Invited
Even though ISOLDE can provide a wide range of isotopes from many different elements,
extraction of some elements still proves to be difficult. This is especially true for refractory
and chemically reactive elements like carbon, boron and refractory metals. Although
extraction of these elements as more volatile molecules was suggested many decades ago,
extraction has only been successful...
Thierry Stora
(CERN)
12/3/15, 10:10 AM
Invited
CERN-MEDICIS aims at producing radioisotope batches by collection from mass separated radioactive beams for medical applications. To fulfil its goal, a new dedicated target irradiation station has been designed and tested in the HRS beam dump. A Radiation Hard Rail Conveyor System, developed within a technology transfer project, transports the targets for irradiation and back for isotope...
Walter Venturini Delsolaro
(CERN)
12/3/15, 11:00 AM
Invited
The HIE ISOLDE project reached a major milestone in October 2015, when radioactive beams were delivered to the users for the first time. This important achievement was the culminating point of an intense year during which the first cryomodule of the HIE ISOLDE superconducting Linac and its high-energy beam transfer lines were installed and subsequently brought into operation. An essential...
Enrico Bravin
(CERN)
12/3/15, 11:20 AM
Invited
The requirements and constraints imposed by the superconducting HIE-ISOLDE REX led to the development of a new type of beam diagnostics boxes. These devices are designed around the stringent geometrical constraints of the inter-cryo-module regions. Compromises and optimisations had to be done in order to fit precise and reliable current, profiles and position measurements inside a few...
Dr
Jose Alberto Rodriguez
(CERN)
12/3/15, 11:40 AM
Invited
This has been an important year for the ISOLDE facility. A lot of new equipment has been installed on the HIE-ISOLDE side including the first cryomodule and several High Energy Beam Transfer lines (HEBT). In addition, many of the subsystems in the REX normal conducting linac have been renewed or refurbished. Following the hardware commissioning of the different systems and in preparation for...
Yacine Kadi
(CERN)
12/3/15, 12:00 PM
Invited
After 20 years of successful ISOLDE operation at the PS-Booster [1], The first cryomodule of the new superconducting linear accelerator HIE-ISOLDE (High Intensity and Energy ISOLDE), installed downstream of the REX-ISOLDE accelerator, was commissioned. It supplies the Miniball array, where an experiment using radioactive zinc ions (see box) began at the end of October. This is the first stage...
Vladimir Manea
(Max-Planck-Gesellschaft (DE))
12/3/15, 1:40 PM
Invited
The evolution of nuclear binding energies with proton and neutron number is one of the key experimental inputs for the study of nuclear structure. It contributed significantly to the consolidation of the traditional concepts of nuclear shells and nuclear deformation, still largely present in phenomenological theoretical approaches. We will present recent ISOLTRAP measurements of binding...
Thomas Elias Cocolios
(University of Manchester (GB))
12/3/15, 2:10 PM
Submitted
An outreach programme has been developed at The University of Manchester to introduce Year 10/11 students (14-16 year old) to nuclear physics research and, hopefully, excite them about the cool things that can be achieved with a Physics degree. This project was initiated in conjunction with ISOLDE 50th anniversary, which was celebrated last year, and towards the 50th anniversary of ISOLDE’s...
Xiaofei Yang
(KU Leuven (BE))
12/3/15, 2:25 PM
Submitted
Laser spectroscopy measurements were performed on bunched beams of Zn ($Z$ = $30$) isotopes at ISOLDE-CERN using the ion cooler-buncher ISCOOL and the high-resolution collinear laser spectroscopy setup COLLAPS. The experimental measurements allowed to deduce the nuclear spins, magnetic moments and quadruple moments of odd-Zn isotopes and isomers up to $^{79}$Zn, as well as the mean square...
Kara Marie Lynch
(CERN)
12/3/15, 2:40 PM
Submitted
The Collinear Resonance Ionization Spectroscopy (CRIS) experiment combines laser spectroscopy and nuclear-decay spectroscopy to provide nuclear-structure measurements of exotic isotopes. At CRIS, the high resolution innate to collinear laser spectroscopy is combined with the high efficiency of ion detection to provide a sensitive technique to probe an isotope’s hyperfine structure. In addition...
Hanne Heylen
(KU Leuven (BE))
12/3/15, 2:55 PM
Submitted
The region south of $^{68}_{28}$Ni$_{40}$ has attracted much interest due to the sudden onset of deformation observed near $N = 40 $. For a better understanding of the dynamics responsible for this change in nuclear structure, it is desirable to expand the experimental knowledge on how the interplay between single-particle and collective nature evolves as a function of proton and/or neutron...
Dag Hanstorp
(Department of Physics, University of Gothenburg, Sweden)
12/3/15, 3:10 PM
Submitted
Negatively charged ions are mainly stabilized through the electron correlation effect. A measure for their stability is the binding energy which is termed electron affinity (EA). The energy required to form a positively charged ion by releasing an electron from the neutral atom is referred to as ionization potential (IP). These two energies are fundamental characteristics, defining the...
Volker Schünemann
(University of Kaiserslautern)
12/3/15, 3:55 PM
Invited
Mössbauer spectroscopy and synchrotron based nuclear resonance scattering techniques are ideal tools to study electronic and dynamic properties of iron centers in chemical and biological systems. During the last years Nuclear Inelastic Scattering (NIS) has been used by us to detect iron based vibrational modes in powders of iron(II) based spin crossover (SCO) compounds [1]. In order to carry...
Dr
Christiaan Vermeulen
(Paul Scherrer Institut (CH))
12/3/15, 4:25 PM
Submitted
During the 2015 Ta target run, PSI concentrated on the collection and purification of $^{149}$Tb and $^{152}$Tb. Both isotopes could be harvested in sufficient quantities to allow transport to PSI, purification and significant imaging and therapy investigations. We report some of the successes and preliminary results of this campaign.
As in our previous ISOLDE campaigns the cumulative Tb...
Gregory Severin
(Technical University of Denmark)
12/3/15, 4:40 PM
Submitted
The purpose of this study was to assess the value of 140Nd/140Pr and 134Ce/134La as *in vivo* PET generators through kinetic evaluation of the pairs with somatostatin analogues in the neuroendocrine tumor-based somatostatin receptor 2 (sst2) system. By employing a known sst2 internalizing vector, DOTATATE, and a known non-internalizing vector,...
Ricardo Cesar Carvalho Teixeira
(IFIMUP and IN-Institute of Nanoscience and Nanotechnology, University of Porto; CFNUL - Centro de Física Nuclear, University of Lisbon)
12/3/15, 4:55 PM
Submitted
In the last years, a deep focus has been devoted to manganites and their exquisite properties triggered by the interplay of spin, orbital, charge and structural degrees of freedom, driven by both fundamental interest and possible applications on colossal magnetoresistance, magnetocaloric and multiferroic properties [1,2]. Additionally, low-cost AMnO3, as well as its doped counterparts, have...
Eric David Bosne
(Instituto Superior Tecnico (PT))
12/3/15, 5:10 PM
Submitted
With the availability of new high resolution position sensitive detectors the oportunity to measure emission channeling patterns with a small angular sampling step arrises. The detector used, Timepix, is a cern developed position senstive detector with a 55um side pixel and a matrix of 512*512. Here will be present the necessary sistems for running the detector, measurement, data transfer and...
Alain Blondel
(Universite de Geneve (CH))
12/3/15, 5:40 PM
Invited
Now that the Higgs boson is found, the physics of massive neutrinos become the frontier of knowledge and mystery in particle physics. The present status will be reviewed, as well as the almost foreseeable future. On a longer time scale, solving the question of neutrino masses might help to solve several pending issues in our understanding of the Universe, such as dark matter and the baryon...
Haraldur Pall Gunnlaugsson
(KU Leuven (BE))
12/4/15, 9:30 AM
In 2015, several beams were for the “first” time utilized for emission Mössbauer spectroscopy (eMS) studies at ISOLDE with applications in solid state physics and biophysics.
These include laser ionized $^{119}$In (2.1 min.) and $^{119}$Ag (2.1 s) for $^{119}$Sn eMS, $^{151}$Dy → $^{151}$Gd (120 d) for $^{151}$Eu eMS and $^{197}$Hg (62 h) for $^{197}$Au eMS.
I will present the newly...
Lars Hemmingsen
(University of Copenhagen (DK))
12/4/15, 9:45 AM
Metal ions are essential to all living systems, and are for example involved in catalysis, regulation of gene expression, controlling and maintaining structure and folding of biomolecules, and electron transport. Inside cells the concentration of both essential and toxic metal ions is tightly controlled, and one facet of metallobiochemistry is the structure and function of various...
Dr
Martin Venhart
(Institute of Physics, Slovak Academy of Sciences)
12/4/15, 10:00 AM
The shape coexistence in $^{181,183,185,187,189}$Au was investigated via $\beta^+$/EC decay of corresponding Hg isotopes. Samples of Hg isotopes were produced by deposition of low-energy beam from ISOLDE facility. For this purpose a new travelling setup, the TATRA tape transportation system was developed. It uses the metallic tape prepared by rapid quenching of alloy melt producing amorphous...
Razvan Lica
(IFIN-HH Bucharest (RO))
12/4/15, 10:15 AM
Barium isotopes are located in a region of the Segr\`e chart characterized by a variety of
shape phenomena, including shape coexistence and presence of static octupole deformations.
In this isotopic chain alternating-parity bands, with large and constant B(E1) transition moments,
have been found in $^{140-144}$Ba; the neighboring nucleus, $^{146}$Ba, shows instead slower E1 transition...
Jacob Johansen
(Aarhus University (DK))
12/4/15, 10:30 AM
*On behalf of the MAGISOL, the IS507 and the IS541 collaborations*
I will present preliminary results from two decay-experiments, which were performed by the MAGISOL collaboration at ISOLDE in 2015.
The first experiment was a decay-study of $^{20,21}$Mg performed at the ISOLDE decay station. The beta-decays of $^{20,21}$Mg provide information about the beta-strength functions to states...
Janne Pakarinen
(University of Jyvaskyla (FI))
12/4/15, 11:15 AM
Invited
The MINIBALL spectrometer has been reinstalled for the HIE-ISOLDE experiments. MINIBALL will benefit from the energy upgrade enabling multistep Coulomb excitation experiments and few-nucleon transfer reactions studies of heavy nuclei. The first experiment was dedicated a study of the evolution of the nuclear structure along the zinc isotopic chain
close to the doubly magic nucleus $^{78}$Ni....
Robert Page
(University of Liverpool (GB))
12/4/15, 11:45 AM
Submitted
The advent of HIE-ISOLDE with high-intensity radioactive beams at energies of ~10 MeV per nucleon and the transfer of the Test Storage Ring (TSR) from Heidelberg to ISOLDE will open up new opportunities for precision studies of exotic nuclei [1]. New spectrometer systems are being designed and developed to exploit these capabilities, including a silicon detector system to be used in-ring with...
Dr
Daniel Doherty
(University of York)
12/4/15, 12:00 PM
Submitted
The N=60 region, for the Sr and Zr isotopic chains, is an interesting example of shape evolution.
On the neutron-rich side of these isotopic chains, N=56 is observed to become an effective sub-shell
closure with $^{96}$Zr (and $^{98}$Sr) exhibiting the properties of a doubly-magic nucleus. However, with
the addition of only four neutrons, $^{100}$Zr is observed to become strongly deformed....
Robert Stegmann
(Technische Universitaet Darmstadt (DE))
12/4/15, 12:15 PM
Submitted
The two-fluid nature of nuclear matter leads to the existence of special excited states which are symmetric or partially anti-symmetric with respect to the relative contributions of the two components of the system, protons and neutrons. These latter states are called proton-neutron mixed-symmetry states (MSSs) [1,2]. The fundamental MSS of weakly collective vibrational nuclei is the...
