Measurement of excited states in (40)Si and evidence for weakening of the N=28 shell gap.
/ Authors
C. Campbell, N. Aoi, D. Bazin, M. Bowen, B. A. Brown, J. Cook, D. Dinca, A. Gade, T. Glasmacher, M. Horoi
and 10 more authors
S. Kanno, T. Motobayashi, W. Mueller, H. Sakurai, K. Starosta, H. Suzuki, S. Takeuchi, J. R. Terry, K. Yoneda, H. Zwahlen
/ Abstract
Excited states in (40)Si have been established by detecting gamma rays coincident with inelastic scattering and nucleon removal reactions on a liquid hydrogen target. The low excitation energy, 986(5) keV, of the 2(1)(+) state provides evidence of a weakening in the N=28 shell closure in a neutron-rich nucleus devoid of deformation-driving proton collectivity.
Journal: Physical review letters