Abstract
Information on the S38 level scheme was expanded through experimental work utilizing a fusion-evaporation reaction and in-beam γ-ray spectroscopy. Prompt γ-ray transitions were detected by the Gamma-Ray Energy Tracking Array (GRETINA) and recoiling S38 residues were selected by the Fragment Mass Analyzer (FMA). Tools based on machine-learning techniques were developed and deployed for the first time in order to enhance the unique selection of S38 residues and identify any associated γ-ray transitions. The new level information, including the extension of the even-spin yrast sequence through Jπ=8(+), was interpreted in terms of a basic single-particle picture as well shell-model calculations which incorporated the empirically derived FSU interaction. A comparison between the properties of the yrast states in the even-Z, N=22 isotones from Z=14 to 20, and for Si36-S38 in particular, was also presented with an emphasis on the role and influence of the neutron 1p3/2 orbital on the structure in the region.
| Original language | English |
|---|---|
| Article number | 064311 |
| Journal | Physical Review C |
| Volume | 107 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 2023 |
Funding
This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Contracts No. DE-AC02-06CH11357 (Argonne), No. DE-FG02-94ER40848 (UML), No. DE-AC02-05CH11231 (LBNL), and No DE-SC0020451 (FRIB). This research used resources of ANL's ATLAS facility, which is a DOE Office of Science User Facility. We gratefully acknowledge the computing resources provided on Bebop, a high-performance computing cluster operated by the Laboratory Computing Resource Center at Argonne National Laboratory. GRETINA was funded by the U.S. DOE, Office of Science, Office of Nuclear Physics, and operated by the ANL and LBNL contract numbers above. TRIUMF receives federal funding via a contribution agreement through the National Research Council Canada (NRC). Work at LLNL was performed under DOE Contract No. DE-AC52-07NA27344 and was supported by the LLNL-LDRD Program under Project No. 23-LW-047. Shell-model calculations used the computational facilities of Florida State University supported by the U.S. DOE, Office of Science, Office of Nuclear Physics, under Contract No. DE-SC0009883.