Conveners
Transitional nuclei and shape coexistence
- Kosuke Nomura (University of Zagreb)
- Jose-Enrique Garcia-Ramos (University of Huelva)
Transitional nuclei and shape coexistence
- Jose Enrique Garcia-Ramos
- Kosuke Nomura
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Zielińska Magda (IRFU, CEA, Université Paris-Saclay)11/07/2022, 10:00Transitional nuclei and shape coexistence
Shape coexistence can be studied via a variety of experimental probes. The first indication of nuclear deformation can be obtained from the level energies, or alternatively from the electromagnetic transition strengths. In this context, the use of systematics is typically far more reliable than focusing on individual states in a specific nucleus, and it should ideally be followed by...
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Volker Werner (TU Darmstadt)11/07/2022, 10:25Transitional nuclei and shape coexistence
An overview on the status of the QPT, or even intertwined QPT, in Zr isotopes above N=50 will be given, mainly from the experimental side, but brought into context with recent MCSM and IBM type calculations.
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Janne Pakarinen (University of Jyväskylä)11/07/2022, 10:45Transitional nuclei and shape coexistence
In the atomic nucleus, the interplay between single-particle motion, collectivity and pairing is seen as a rich tapestry of coexisting nuclear shapes and exotic excitations. One of the richest regions is formed by very neutron-deficient nuclei with the proton number Z close to the magic 82 and the neutron number N close to 104 midshell [1-3]. A considerable body of both theoretical and...
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Bhoomika Maheshwari (University of Zagreb)11/07/2022, 11:05Empirical aspects of quantum phase transitions in nuclei
Abstract
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Nuclei with either protons or neutrons at closed-shell magic configuration, have only one type of active nucleons and are called semi-magic nuclei. Presence of like-nucleons in such semi-magic nuclei result in the simplicity out of complex nucleonic structure. This can be understood in terms of the symmetries of pairing Hamiltonian and seniority/ generalized seniority quantum... -
Vasil Karayonchev (University of Cologne, TRIUMF)11/07/2022, 12:00Transitional nuclei and shape coexistence
Lifetimes of low-spin excited states in $^{98}$Zr were measured using the recoil-distance Doppler-shift technique and the Doppler-shift attenuation method. The nucleus of interest was populated in a $^{96}$Zr($^{18}$O,$^{16}$O)$^{98}$Zr two-neutron transfer reaction at the Cologne FN Tandem accelerator giving access to the low-sping structure of the nucleus. Lifetimes of six excited states, of...
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Giorgia Pasqualato (INFN Sezione di Padova)11/07/2022, 12:20Transitional nuclei and shape coexistence
Nuclei around N=60, Z=40 show a rapid variation in the deformation of their ground state with a rather small change in the neutron number. This feature manifests a subtle interplay between different aspects of the forces in the nucleus and makes this region an ideal testing ground for various nuclear structure theories. As an example, it is established that the ground state of Zr isotopes vary...
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Noam Gavrielov Somin (Yale University)11/07/2022, 12:40Transitional nuclei and shape coexistence
In this talk I will discuss our latest work on the Zr isotopes with $A=$92$-$110, which have one of the most intricate evolutions of structure in the nuclear chart.
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We explain their structural evolution using the notion of intertwined quantum phase transitions (IQPTs), for which a QPT involving a crossing of two configurations (Type II QPT) is accompanied by a shape evolution of each... -
Esperanza Maya Barbecho (Universidad de Huelva)11/07/2022, 13:00Transitional nuclei and shape coexistence
SHAPE COEXISTENCE IN STRONTIUM ISOTOPES
The shape of nuclei is determined by a fine balance between the stabilizing effect of closed shells and the pairing and quadrupole force that tends to make them deformed. As other well known cases, located in the A = 100 mass region, as Yb, Zr or Nb for example, Sr isotopes are good candidates to study the existence of this nuclear deformation. In...
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