Phys.Rev. C 112, 014331 (2025)

L.A.Riley, I.Conroy, A.M.Himmelreich, M.Heinze, J.Kosa, B.McNulty, P.D.Cottle, M.Spieker, A.Volya, A.L.Conley, D.Houlihan, B.Kelly, K.W.Kemper, S.M.Ali, T.Beck, S.A.Gillespie, M.Hausmann, S.Noji, J.Pereira, D.Weisshaar, J.Chung-Jung, P.Farris, A.Gade, G.Grauvogel, A.M.Hill, Z.Rahman, R.G.T.Zegers, B.Longfellow, N.D.Pathirana

Determination of proton and neutron contributions to the 0_g.s.⁺→2₁⁺ excitations in ⁴²Si and ⁴⁴S using inelastic proton scattering in inverse kinematics and intermediate-energy Coulomb excitation

NUCLEAR REACTIONS ²⁰⁹Bi(⁴²Si, ⁴²Si'), E=76 MeV/nucleon; ¹H(⁴²Si, ⁴²Si'), E=91.2 MeV/nucleon; ¹H(⁴⁴S, ⁴⁴S'), E=82.3 MeV/nucleon; measured reaction products, Eγ, Iγ. ⁴²Si, ⁴⁴S; deduced γ-ray energies, partial level schemes and σ, the ratio of the neutron and proton transition matrix elements, ⁴²Si has a stable quadrupole deformation in its ground state and that ⁴⁴S does not. Comparison with available data, shell-model calculations with the FSU interaction. The NSCL–Ursinus College liquid hydrogen target, the GRETINA γ-ray tracking array, the Facility for Rare Isotope Beams at Michigan State University (FRIB).

doi: 10.1103/b8xj-ycqk