NUSPEQ2023 - International Symposium on Nuclear Spectroscopy for Extreme Quantum Systems

In-beam γ-ray spectroscopy of 32Mg

8 Mar 2023, 15:15

5m

Poster Session

Speaker

Noritaka Kitamura

Description

In the so-called "island of inversion," the ground states of neutron-rich nuclei around $N=20$ exhibit strong admixtures of intruder configurations, which lead to the breakdown of the $N=20$ shell gap. At the heart of the island of inversion is ${}^{32}$Mg, and from both experimental and theoretical perspectives, this nucleus serves as a critical benchmark.
In this contribution, we report on a precision in-beam $\gamma$-ray measurement of ${}^{32}$Mg using two direct-reaction probes, one-neutron (two-proton) removal from ${}^{33}$Mg (${}^{34}$Si). By combining observables obtained in this measurement, a significantly updated level scheme for ${}^{32}$Mg was constructed, and various structures coexisting in this key nucleus were unraveled. The experimental results were compared with predictions by state-of-the-art theoretical models. However, unexplained discrepancies remain, meaning that the structure of ${}^{32}$Mg is not yet fully understood.