Phys.Rev. C 92, 034306 (2015)

T.Braunroth, A.Dewald, H.Iwasaki, S.M.Lenzi, M.Albers, V.M.Bader, T.Baugher, T.Baumann, D.Bazin, J.S.Berryman, C.Fransen, A.Gade, T.Ginter, A.Gottardo, M.Hackstein, J.Jolie, A.Lemasson, J.Litzinger, S.Lunardi, T.Marchi, V.Modamio, C.Morse, D.R.Napoli, A.Nichols, F.Recchia, S.R.Stroberg, R.Wadsworth, D.Weisshaar, K.Whitmore, K.Wimmer

Reduced transition strengths of low-lying yrast states in chromium isotopes in the vicinity of N=40

NUCLEAR REACTIONS ⁹Be(⁵⁹Mn, ⁵⁸Cr), E=92.1 MeV/nucleon; ⁹Be(⁶¹Mn, ⁶⁰Cr), E=91.9 MeV/nucleon; ⁹Be(⁶³Mn, ⁶²Cr), E=98 MeV/nucleon, [secondary ^59,61,63Mn beams from ⁹Be(⁸²Se, X), E=140 MeV/nucleon primary reaction using A1900 separator at NSCL-MSU]; measured Eγ, Iγ, beam-like recoil particle spectra and yields, (particle)γ-coin, level half-lives by recoil-distance Doppler-shift (RDDS) method using S800 spectrograph and SeGA array. ^58,60,62Cr; deduced levels, J, π, B(E2), intrinsic quadrupole moments Q₀ and deformation parameter β₂. Comparison with calculations using shell-model with LNPS interactions, realistic shell-model, and IBM-2. Systematics of energies and B(E2) for first 2+ states in N=22-52, Ti, Cr, Fe, Ni, Se and Kr nuclei. Systematics of ratios of energies and B(E2) values for first 2+, 4+ and 6+ states in ^{52,54,56,58,60,62}Cr, and E(5) limit.

doi: 10.1103/PhysRevC.92.034306