Nuclear Structure 2026

Session

Shell Evolution

R2

Jul 30, 2026, 11:00 AM

Fletcher Challenge Canada (Simon Fraser University Harbour Centre)

78. Investigations of the unbound states in 20C

Sidong Chen (University of York)

7/30/26, 11:00 AM

Contributed Talks

The carbon isotopes, with $Z$=6 being the first spin-orbit shell gap originating from the splitting of the $1p_{1/2}$–$1p_{3/2}$ orbitals, provide an excellent ground to study changes in proton spin-orbit splitting from stability to the dripline. Neutron-rich carbon isotopes have been intensively investigated over the last decade. Transition probabilities, $B(E2;2^+\rightarrow0^+)$, have been...

145. Neutron knockout from titanium isotopes near the new magic numbers N=32,34

Martha Reece (GSI)

7/30/26, 11:30 AM

Contributed Talks

The nuclear shell model is extremely effective in describing the behaviour of stable magic nuclei. Modern radioactive ion beam facilities have facilitated tests of the shell model along chains of magic isotopes stretching far from the valley of stability. With increased isospin asymmetry, the energies of proton and neutron orbitals can shift, in some cases moving far enough that magic numbers...

40. Rare decay branches of A ~ 90 isomers studied with GRIFFIN using local source production

Jonathan Williams (TRIUMF)

7/30/26, 11:50 AM

Posters

Modern HPGe detector arrays such as GRIFFIN and TIGRESS at TRIUMF/ISAC allow for extremely high precision $\gamma$-ray branching ratio measurements - as low as $10^{-7}$ depending on counting rate and measurement time - allowing for examination of rare decay branches. A promising avenue for pursuing these high precision measurements at TRIUMF is local production of high activity sources using...

68. Beyond Sphericity in a Semi-Magic Nucleus: Multiple Shape Coexistence in $^{116}$Sn

Marco Siciliano (Argonne National Laboratory)

7/30/26, 12:10 PM

Contributed Talks

The evolution of nuclear shapes and the phenomenon of shape coexistence lie at the heart of our understanding of nuclear structure and the effective nuclear interaction. While dramatic examples of shape coexistence have long been established near closed shells, semi-magic nuclei have traditionally been regarded as structurally simple systems, dominated by pairing correlations and spherical...

143. From Shell Evolution to Halo Structure: Quasi-Free Scattering at SAMURAI

Hongna Liu (Beijing Normal University)

Quasi-free scattering (QFS) reactions in inverse kinematics have emerged as a powerful tool to probe the microscopic structure of exotic nuclei. Using a thick liquid hydrogen target and the SAMURAI spectrometer at RIBF, a series of (p,2p) and (p,pn) measurements have been performed. Owing to the Fourier relationship between momentum and spatial distributions, the root-mean-square (rms) radii...

162. Probing shell evolution in neutron-rich 50-54Ca: lifetime and Coulomb excitation measurements at RIBF

Ting Gao (University of York)

Contributed Talks

The structural evolution of neutron-rich Ca isotopes (Z = 20) has drawn significant experimental and theoretical interest, particularly concerning the emergence of sub-shell closures at N = 32 [1] and N = 34 [2]. While these closures are supported by excited-state energies [2], mass measurements [1, 3], and direct reaction cross sections [4, 5], the large charge radii observed in 50,52Ca [6]...