Phys.Rev. C 86, 011305 (2012), Erratum Phys.Rev. C 86, 049902 (2012)

T.Baugher, A.Gade, R.V.F.Janssens, S.M.Lenzi, D.Bazin, B.A.Brown, M.P.Carpenter, A.N.Deacon, S.J.Freeman, T.Glasmacher, G.F.Grinyer, F.G.Kondev, S.McDaniel, A.Poves, A.Ratkiewicz, E.A.McCutchan, D.K.Sharp, I.Stefanescu, K.A.Walsh, D.Weisshaar, S.Zhu

Intermediate-energy Coulomb excitation of ^{58, 60, 62}Cr: The onset of collectivity toward N=40

NUCLEAR REACTIONS ¹⁹⁷Au(⁵⁸Cr, ⁵⁸Cr'), E=81.1 MeV/nucleon; ¹⁹⁷Au(⁶⁰Cr, ⁶⁰Cr'), E=81.7 MeV/nucleon; ²⁰⁹Bi(⁶²Cr, ⁶²Cr'), E=79.0 MeV/nucleon; measured scattered projectile spectra, energy loss, time-of-flight, Eγ, Iγ, (particle)γ-coin using SeGA array at NSCL facility, integrated cross section, GEANT-4 simulations. Intermediate Coulomb excitation using secondary Cr beams from ⁹Be(⁷⁶Ge, X), E=130 MeV/nucleon primary reaction. ^58,60,62Cr, ¹⁹⁷Au; deduced levels, B(E2) of first 2+ state in Cr nuclei and a level in ¹⁹⁷Au, ratio of neutron and proton transition matrix elements M_n/M_p. ⁶²Cr; measured half-life of first 2+ state by Doppler shift and line-shape method. Systematics of energies and B(E2) values of first 2+ states in even-even N=22-40 Ni, Fe and Cr isotopes. Comparison with shell model calculations in the fpgd space using the state-of-the-art LNPS effective interaction.

doi: 10.1103/PhysRevC.86.011305