Dr
Freddy Flavigny
(IPN Orsay)
30/05/2017, 16:05
Invited Presentation
Across the nuclear chart, some of the most drastic known shape transitions appear in the A~100 region at N=60 for neutron-rich Zr and Sr isotopes [1,2]. Such a sudden rearrangement of a whole nucleus only adding a couple of nucleons is a peculiar feature of the nuclear system highlighting the subtle interplay between collective and microscopic degrees of freedom. Transitional regions where...
Prof.
Piet Van Duppen
(KU Leuven - IKS)
30/05/2017, 16:20
Invited Presentation
Nuclei in the vicinity of 78Ni have recently been in focus of many experimental and theoretical investigations. In particular, the neutron-rich Zn isotopes, only two protons above the Ni isotopic chain, are ideally suited to study the evolution of the Z = 28 proton shell gap, and the stability of the N = 50 neutron shell gap. In the last decade, several experiments were performed to study the...
Dr
Tea Mijatovic
(NSCL)
30/05/2017, 16:35
Invited Presentation
Collective motions in atomic nuclei such as rotation and vibration have been characterized by the ground-state shape as a single basis. This picture can be altered in exotic nuclei with unusual proton-to-neutron ratios if the nuclear shape changes drastically at low excitation energies. The phenomena of shape coexistence occur when two or more states with distinct shapes exist in a nucleus...
Rosa María Pérez Vidal
(Instituto de Física Corpuscular, CSIC-Universitat de València)
30/05/2017, 16:50
Invited Presentation
The 100Sn nucleus, being the heaviest bound doubly-magic nucleus with equal number of protons and neutrons, has attracted considerable interest from the experimental as well as theoretical point of view. In particular, the structure of this nucleus and its neighbours are excellent benchmark cases to test state-of-the-art shell-model calculations in the region.
Such models, predict an...
Louis Olivier
(IPN Orsay)
30/05/2017, 17:05
Invited Presentation
Nuclear shell structure is evolving when going into more and more exotic regions. As a consequence, the conventional magic numbers can be different far from stability. Over the last years, the RIB factory at RIKEN has become available, providing primary beam of uranium with intensities that are now sufficient for gamma spectroscopy of neutron-rich copper isotopes next to $^{78}$Ni ($Z=28$,...
Dr
Jack Henderson
(TRIUMF)
30/05/2017, 17:20
Invited Presentation
Recent theoretical developments in ab initio nuclear theory techniques make calculations of the properties of sd-shell nuclei possible without a reliance on phenomenology. In particular, in-medium similarity renormalization group (IM-SRG) and coupled-cluster theory have demonstrated promising results in describing the collective properties of nuclei, for example in self-conjugate 20Ne and 24Mg...
Prof.
Silvia Leoni
(Università di Milano and INFN sez. Milano)
30/05/2017, 17:35
Invited Presentation
The phenomenon of shape isomerism is related to the existence, in the nuclear potential energy surface (PES), of a secondary minimum associated with large deformation and separated from the primary minimum (ground state) by a high barrier. Shape isomers at spin zero have clearly been observed, so far, only in actinide nuclei. The existence of shape isomers in lighter systems has been a matter...
Dr
Tibor Kibedi
(Department of Nuclear Physics, RSPEE, The Australian National University)
30/05/2017, 17:50
Invited Presentation
Doubly magic nuclei and their nearest neighbours serve as an ideal testing ground for the nuclear shell model, and consequently enable us to define effective nuclear interactions. Collective states in nuclei near 56Ni can be attributed to multiparticle-multihole excitations from the 1f7/2 to the 2p3/2, 1f5/2 and 2p1/2 orbits across the N, Z=28 shell gap. Properties of excited 0+ states as well...
Prof.
Ani Aprahamian
(University of Notre Dame)
30/05/2017, 18:05
Invited Presentation
The existence and characterization of multi-phonon vibrational modes in deformed nuclei remains an open question in nuclear structure. The question revolves around the possible degrees of freedom in deformed nuclei [1-4]. Rotational motion is an expected feature of deformed nuclei, the open challenge is whether the granularity of nuclei allows single or multiple quanta of vibrational...