32nd Nuclear Physics Workshop 2026

Session

Session 4

29 Sept 2026, 15:00

D-332

88. Experimental studies of shape coexistence in $^{94,96}$Zr

Magda Zielinska (IRFU, CEA, Universite Paris-Saclay)

29/09/2026, 15:00

Invited lecture

Quadrupole deformation of low-lying excited states in zirconium nuclei has attracted considerable attention in the last years. An enhanced $B(E2; 2^+_2 \rightarrow 0^+_2$) value was observed in $^{96}$Zr [1], suggesting that an excited deformed configuration coexists with a nearly spherical ground state. This observation has been linked to the type-II shell-evolution mechanism [2], i.e. ...

99. Nuclear Structure of the Zr Isotopes; Collectivity, Phase Transitions, and Shape Coexistence

Paul Garrett (University of Guelph)

29/09/2026, 15:30

Invited lecture

The evolution of ground-state shapes usually proceeds smoothly, however for Rb, Sr, Y, and Zr nuclei there are abrupt shape transitions that occur at $N=60$ (see Refs. [1,2] for reviews). Some recent calculations, using the Monte Carlo Shell Model (MCSM) [3] and the Interacting Boson Model employing the Intertwined Quantum Phase Transition (IQPT) [5], have been able to reproduce this abrupt...

106. Experimental studies on shape coexistence in mid-shell Pb region

Joonas Ojala (University of Jyväskylä)

29/09/2026, 16:00

Invited lecture

Shape coexistence refers to a phenomenon where multiple shapes occur within the same nucleus. While this phenomenon has been proposed to exist in almost all nuclei\,[1], neutron-deficient Pb isotopes near the N=104 mid-shell have been a primary focus for detailed investigations of shape coexistence for decades. In particular, neutron-deficient Pb isotopes, such as $^{184,186,188,190}$Pb, ...

84. Exploring emergence of shape coexistence in 110Cd

Katarzyna Wrzosek-Lipska (Heavy Ion Laboratory, University of Warsaw)

29/09/2026, 17:00

Invited lecture

Mid-shell Cd nuclei were traditionally considered to be the best examples of vibrational nuclei. Recent studies that combined detailed $\gamma$-ray spectroscopy with sophisticated beyond-mean-field calculations had suggested [1,2] that the low-lying 0$^+$ states in $^{110,112}$Cd possessed prolate, triaxial, and oblate shapes with rotational-like bands built upon them. If confirmed, this would...

102. Deformation in the vicinity of 40Ca and 56Ni

Katarzyna Hadyńska-Klęk (Heavy Ion Laboratory, University of Warsaw, Poland)

29/09/2026, 17:30

Invited lecture

The concept of magic numbers constitutes a cornerstone of nuclear physics research. Over the past few decades, it has been well established that closed-shell nuclei exhibit spherical shapes in their ground states. However, as nucleons are added to or removed from complete shells, they tend to deform the microscopic mass distribution. Studies of deformed shapes are of key importance for the...

81. Large-amplitude pairing collective dynamics associated with spontaneously broken global U(1) symmetry

Chisato Ruike (University of Tsukuba)

29/09/2026, 18:00

Seminar

The moment of inertia for pair rotation (P-MoI) characterizes the spectral properties of pair rotational collective mode associated with the spontaneous breaking of gauge symmetry in superfluid nuclei. As a collective excitation in the particle-number gauge space, the pair rotation restores the broken symmetry through the phase rotation of the order parameter along the bottom of the...

72. Investigation of pygmy dipole resonances in 64Ni using proton inelastic scattering and the KRATTA, LaBr3​(Ce), and PARIS detector systems at CCB IFJ PAN

Kacper Proszowski (AGH University of Krakow, IFJ PAN)

29/09/2026, 18:20

Short seminar

This work presents the methodology and results of an experimental study on inelastic proton-induced excitations of a $^{64}Ni$ target at beam energy $E = 180 MeV$. The measurements were conducted at the Cyclotron Centre Bronowice (CCB) of the Henryk Niewodniczański Institute of Nuclear Physics PAN in Krakow. The experiment utilized a proton beam to excite the target nuclei, followed by the...