Strong M1 components in 3(i)(-) -> 3(1)(-) transitions in nearly spherical nuclei: Evidence for isovector-octupole excitations

M Scheck, P. A. Butler, C. Fransen, V. Werner, S. W. Yates

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11 Citations (Scopus)

Abstract

An evaluation of data obtained in (n, n'gamma) experiments reveals strong M1 3(i)(-) -> 3(1)(-) transitions in nuclei near the N = 50 (Zr-92, Mo-94, and Mo-96), Z = 50 (Cd-112 and Cd-114), and N = 82 (Nd-144) shell closures. The observed < 3(1)(-) ||M1||3(i)(-)> matrix elements scale with the < 2(1)(+) ||M1||2(ms)(+)> matrix elements connecting the mixed-symmetric and symmetric quadrupole excitations. In accordance with a picture of a mixed two-component quantum system, the energy difference between the initial 3(i)(-) state and the 3(1)(-) octupole phonon is proportional to the |< 3(1)(-)|| E3||0(gs)(+)>| matrix element. The possibility of assigning the 3(-) states of interest as octupole isovector states is discussed.
Original languageEnglish
Article number064305
JournalPhysical Review C
Volume81
Issue number6
DOIs
Publication statusPublished - 4 Jun 2010
Externally publishedYes

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