Nuclear Structure 2026

Session

Thursday Morning Early Session Block

R1

Jul 30, 2026, 9:00 a.m.

Fletcher Challenge Canada (Simon Fraser University Harbour Centre)

171. Shape coexistence studied with Coulomb excitation and AGATA

Dr Magda Zielinska, (CEA Saclay)

2026-07-30, 9:00 a.m.

Invited speakers

The history of Coulomb-excitation measurements with the new-generation
European γ-ray spectrometer AGATA dates back to the very first physics experiment with this array, which took place in April 2010 and aimed at investigation of a highly-deformed structure in 42Ca [1]. The shape parameters obtained from this study confirm that the excited structure in 42Ca possesses a strikingly large...

23. Search for Shape Coexistence Signatures in 100Ru using Thermal Neutron Capture Reaction.

Sangeet Pannu (University Of Guelph)

2026-07-30, 9:30 a.m.

Contributed Talks

At the forefront of nuclear structure research is the topic of shape coexistence, which occurs when states within the same nucleus at similar energies possess distinct shapes. Studies of nuclei in the Zr (Z=40) - Sn (Z=50) region have shown evidence for shape coexistence with deformed rotational-like bands coexisting with spherical or weakly deformed ground state configurations. In the Ru...

20. Shape transitions of the 2+ states in 106,108,110Sn from Coulomb excitation

Jason Park (Lund University/Hope College)

2026-07-30, 9:50 a.m.

Contributed Talks

The experimental $B(E2; 2_1^+ \to 0_1^+)$ values in neutron-deficient, even-even Sn isotopes are found to be enhanced compared to calculations, a discrepancy which has eluded a satisfactory solution for over a decade. A Monte Carlo Shell Model (MCSM) [1] attributed this phenomenon to significant proton excitations across the $Z = 50$ shell in neutron-deficient Sn isotopes, and predicted a...

138. Investigating the deformation of intruder states in 79Zn via Coulomb excitation

Filippo Angelini (GSI)

2026-07-30, 10:10 a.m.

Contributed Talks

In the region of N~50 several pieces of evidence supporting shape coexistence close to 78Ni have been found [1-3]. In particular, the ∼940-keV 1/2+ isomeric state in 79Zn, first observed in a (d,p) transfer measurement [4], has been interpreted as an intruder state, related to neutron excitations across N=50. Laser-spectroscopy measurements found a large isomeric shift for this state with...