Phys.Rev. C 100, 044312 (2019); Erratum Phys.Rev. C 101, 059902 (2020)

L.A.Riley, D.Bazin, J.Belarge, P.C.Bender, B.A.Brown, P.D.Cottle, B.Elman, A.Gade, S.D.Gregory, E.B.Haldeman, K.W.Kemper, B.R.Klybor, M.A.Liggett, S.Lipschutz, B.Longfellow, E.Lunderberg, T.Mijatovic, J.Pereira, L.M.Skiles, R.Titus, A.Volya, D.Weisshaar, J.C.Zamora, R.G.T.Zegers

Inverse-kinematics proton scattering from ^{42, 44}S, ^{41, 43}P, and the collapse of the N=28 major shell closure

NUCLEAR REACTIONS ¹H(⁴²S, ⁴²S'), E=62 MeV/nucleon; ¹H(⁴⁴S, ⁴⁴S'), E=70 MeV/nucleon; ¹H(⁴¹P, ⁴¹P'), E=58 MeV/nucleon; ¹H(⁴³P, ⁴³P'), E=65 MeV/nucleon, [secondary ^42,44S, ^41,43P beams from ⁹Be(⁴⁸Ca, X), E=140 MeV/nucleon followed by separation using A1900 fragment separator at NSCL-MSU]; measured reaction products, Eγ, Iγ, (particle)γ-coin using S-800 high resolution magnetic spectrograph, and GRETINA array. ^42,44S, ^41,43P; deduced levels, J, π, scattering σ, deformation lengths and ratio of neutron-to-proton transition matrix elements for ^42,44S. Optical model analysis. Comparison with shell-model calculations using SDPF-U and SDPF-MU interactions, and with previous experimental results. Systematics of deformation lengths in ^{36,38,40,42,44}S. Systematics of ratios of neutron to proton transition matrix elements in ^42,44,48,50Ca, ^40,42,44,46Ar, ^{36,38,40,42,44,46}S, ^36,38Si.

doi: 10.1103/PhysRevC.100.044312