1. Inverse-kinematics proton scattering from S42,44, P41,43 , and the collapse of the N=28 major shell closure
- Author
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J. C. Zamora, Alexandra Gade, Alexander Volya, K. W. Kemper, R. G. T. Zegers, E. B. Haldeman, D. Weisshaar, M. A. Liggett, Brandon Elman, Brenden Longfellow, B. A. Brown, P. C. Bender, B. R. Klybor, P. D. Cottle, E. Lunderberg, J. Pereira, T. Mijatović, R. Titus, L. A. Riley, S. D. Gregory, J. Belarge, S. Lipschutz, L. M. Skiles, and D. Bazin
- Subjects
Physics ,Matrix (mathematics) ,Closure (mathematics) ,010308 nuclear & particles physics ,Excited state ,Proton scattering ,0103 physical sciences ,Shell (structure) ,Collapse (topology) ,Atomic physics ,010306 general physics ,01 natural sciences - Abstract
Excited states of the neutron-rich isotopes $^{42,44}\mathrm{S}$ and $^{41,43}\mathrm{P}$ have been studied via inverse-kinematics proton scattering from a liquid hydrogen target, using the GRETINA $\ensuremath{\gamma}$-ray tracking array to extract inelastic-scattering cross sections. Deformation lengths of the ${2}_{1}^{+}$ excitations in $^{42,44}\mathrm{S}$ have been determined and, when combined with deformation lengths determined with electromagnetic probes, yield the ratio of neutron-to-proton matrix elements ${M}_{n}/{M}_{p}$ for the ${2}_{1}^{+}$ excitations in these nuclei. The present results for $^{41,43}\mathrm{P}(p,{p}^{\ensuremath{'}})$ are used to compare two shell-model interactions, SDPF-U and SDPF-MU. As in a recent study of $^{42}\mathrm{Si}$, the present results on $^{41,43}\mathrm{P}$ favor the SDPF-MU interaction.
- Published
- 2019
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