Spacing of nuclear ground-state levels in the region 94<~N<~114

R. C. Barber, J. O. Meredith, F. C.G. Southon, P. Williams, J. W. Barnard, K. Sharma, H. E. Duckworth

Research output: Contribution to journalArticle

4 Scopus citations


New atomic-mass determinations are reported which establish the masses of Hf174 and W180 with significantly improved precision, and lead to new values for the double-neutron separation energies S2n of Hf176, W180, and W182. A plot of S2n in the region 94<~N<~114 now shows systematic downward breaks at N=98, 104, and 108. These features are interpreted in terms of energy gaps above the Nilsson single-particle levels 92+[624] (N=108), 52-[523] (N=98), and 1/2-[512] (N=104).

Original languageEnglish (US)
Pages (from-to)728-730
Number of pages3
JournalPhysical Review Letters
Issue number11
StatePublished - Jan 1 1973
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Barber, R. C., Meredith, J. O., Southon, F. C. G., Williams, P., Barnard, J. W., Sharma, K., & Duckworth, H. E. (1973). Spacing of nuclear ground-state levels in the region 94<~N<~114. Physical Review Letters, 31(11), 728-730.