title: Measurement of excited states in (40)Si and evidence for weakening of the N=28 shell gap.
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.
authors.affiliation: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
authors.forename: C M
authors.initials: CM
authors.lastname: Campbell
authors.forename: N
authors.initials: N
authors.lastname: Aoi
authors.forename: D
authors.initials: D
authors.lastname: Bazin
authors.forename: M D
authors.initials: MD
authors.lastname: Bowen
authors.forename: B A
authors.initials: BA
authors.lastname: Brown
authors.forename: J M
authors.initials: JM
authors.lastname: Cook
authors.forename: D-C
authors.initials: DC
authors.lastname: Dinca
authors.forename: A
authors.initials: A
authors.lastname: Gade
authors.forename: T
authors.initials: T
authors.lastname: Glasmacher
authors.forename: M
authors.initials: M
authors.lastname: Horoi
authors.forename: S
authors.initials: S
authors.lastname: Kanno
authors.forename: T
authors.initials: T
authors.lastname: Motobayashi
authors.forename: W F
authors.initials: WF
authors.lastname: Mueller
authors.forename: H
authors.initials: H
authors.lastname: Sakurai
authors.forename: K
authors.initials: K
authors.lastname: Starosta
authors.forename: H
authors.initials: H
authors.lastname: Suzuki
authors.forename: S
authors.initials: S
authors.lastname: Takeuchi
authors.forename: J R
authors.initials: JR
authors.lastname: Terry
authors.forename: K
authors.initials: K
authors.lastname: Yoneda
authors.forename: H
authors.initials: H
authors.lastname: Zwahlen