학술논문
Experimental Study of the $^{\textbf{38}}$S Excited Level Scheme
Document Type
Working Paper
Author
Hoffman, C. R.; Lubna, R. S.; Rubino, E.; Tabor, S. L.; Auranen, K.; Bender, P. C.; Campbell, C. M.; Carpenter, M. P.; Chen, J.; Gott, M.; Greene, J. P.; Hoff, D. E. M.; Huang, T.; Iwasaki, H.; Kondev, F. G.; Lauritsen, T.; Longfellow, B.; Santamaria, C.; Seweryniak, D.; Tang, T. L.; Wilson, G. L.; Wu, J.; Zhu, S.
Source
Subject
Language
Abstract
Information on the $^{38}$S level scheme was expanded through experimental work utilizing a fusion-evaporation reaction and in-beam $\gamma$-ray spectroscopy. Prompt $\gamma$-ray transitions were detected by the Gamma-Ray Energy Tracking Array (GRETINA) and recoiling $^{38}$S residues were selected by the Fragment Mass Analayzer (FMA). Tools based on machine-learning techniques were developed and deployed for the first time in order to enhance the unique selection of $^{38}$S residues and identify any associated $\gamma$-ray transitions. The new level information, including the extension of the even-spin yrast sequence through $J^{\pi} = 8^{(+)}$, 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 $^{36}$Si-$^{38}$S in particular, was also presented with an emphasis on the role and influence of the neutron $1p_{3/2}$ orbital on the structure in the region.