Nuclear Structure 2026

Session

Thursday Afternoon Early Session

R3

Jul 30, 2026, 2:00 p.m.

Fletcher Challenge Canada (Simon Fraser University Harbour Centre)

161. Recent developments of ab initio calculations in light nuclei

Prof. Sonia Bacca (Johannes Gutenberg University)

2026-07-30, 2:00 p.m.

Invited speakers

The past decade has witnessed tremendous progress in theoretical and computational approaches to describing the atomic nucleus as a system of interacting protons and neutrons. In particular, ab initio calculations based on interactions and currents derived from chiral effective field theory have achieved an accurate description of key experimental quantities. In this talk, I will focus on...

36. Approaching the N=20 Island of Inversion with the $^{29}$Mg(d,p)$^{30}$Mg reaction

Alan Wuosmaa (University of Connecticut)

2026-07-30, 2:30 p.m.

Contributed Talks

We have studied the $^{29}$Mg(d,p)$^{30}$Mg reaction in inverse kinematics, with the first use of a reaccelerated rare-isotope beam from FRIB delivered to the SOLARIS solenoidal spectrometer. The N=20 Island of Inversion (IoI) at $^{32}$Mg is well known, arising from a diminished gap between the $sd$ and $fp$ neutron shells. Evidence for this modification comes from a variety of studies...

150. Experimental Study of Electromagnetic Transitions in Neutron-rich ²²F

Muzafar Ibrahim (University of Massachusetts Lowell)

2026-07-30, 2:50 p.m.

Contributed Talks

The evolution of nuclear shell structure at the interface between the p and sd shells remains a central problem in nuclear physics, where cross-shell excitations and proton–neutron correlations drive changes in nuclear structure. The odd–odd nucleus 22F lies just above the Z=8 shell closure and is particularly sensitive to excitations across the p–sd shell gap, making it an ideal system...

43. Exploring Configurations in Neutron-Rich Si Isotopes

Matthew Martin (Argonne National Laboratory)

2026-07-30, 3:10 p.m.

Contributed Talks

Understanding the evolution of nuclear shells with increasing nucleon number provides insight into how the fundamental interactions governing nuclear properties manifest at the scale of nuclear observables. One such region where this is particularly apparent is the $N=20$ island of inversion, where the nominally higher-lying $\nu(f_{7/2})$ shell falls below the $\nu(d_{3/2})$ and dominates the...