Measurement of excited states in 40Si and evidence for weakening of the N=28 shell gap

A. Gade; B.A. Brown; C.M. Campbell; D. Bazin; D.-C. Dinca; H. Sakurai; H. Suzuki; H. Zwahlen; J.M. Cook; J.R. Terry

arxiv: nucl-ex/0608029 · v1 · submitted 2006-08-15 · ⚛️ nucl-ex

Measurement of excited states in 40Si and evidence for weakening of the N=28 shell gap

C.M. Campbell , N. Aoi , D. Bazin , M.D. Bowen , B.A. Brown , J.M. Cook , D.-C. Dinca , A. Gade

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T. Glasmacher M. Horoi S. Kanno T. Motobayashi W.F. Mueller H. Sakurai K. Starosta H. Suzuki S. Takeuchi J.R. Terry K. Yoneda H. Zwahlen

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keywords evidenceexcitedshellstatesweakeningbeenclosurecoincident

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Excited states in 40Si 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.

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Measurement of excited states in 40Si and evidence for weakening of the N=28 shell gap

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