1. Inverse-kinematics proton scattering from $^{42,44}$S, $^{41,43}$P and the collapse of the $N=28$ major shell closure
- Author
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Riley, L. A., Bazin, D., Belarge, J., Bender, P. C., Brown, B. A., Cottle, P. D., Elman, B., Gade, A., Gregory, S. D., Haldeman, E. B., Kemper, K. W., Klybor, B. R., Liggett, M. A., Lipschutz, S., Longfellow, B., Lunderberg, E., Mijatovic, T., Pereira, J., Skiles, L. M., Titus, R., Volya, A., Weisshaar, D., Zamora, J. C., and Zegers, R. G. T.
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Nuclear Experiment - Abstract
Excited states of the neutron-rich isotopes $^{42,44}$S and $^{41,43}$P have been studied via inverse-kinematics proton scattering from a liquid hydrogen target, using the GRETINA $\gamma$-ray tracking array to extract inelastic scattering cross sections. Deformation lengths of the $2^+_1$ excitations in $^{42,44}$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 $^{41,43}$P$(p,p')$ are used to compare two shell model interactions, SDPF-U and SDPF-MU. As in a recent study of $^{42}$Si, the present results on $^{41,43}$P favor the SDPF-MU interaction., Comment: 11 pages, 14 figures
- Published
- 2019
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