科研之友
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摘要
We study the sum rules of double Gamow-Teller (DGT) excitations through double spin-isospin operator (sigma t(-))(2). In general, 2(+) states in the grand-daughter nuclei have dominant transition strength in DGT excitations and 0(+) states are weak, except in T = 1 mother nuclei in which 0(+) strength is competitive with 2(+) strength. The isospin selection of DGT is also discussed among five possible isospin states in grand-daughter nuclei. A possibility to extract the unit cross section for the DGT transition strength is pointed out in the (st(-)) 2 excitation of double isobaric analog state (DIAS) in T = 1 nuclei.
- 出版日期2016-12-27
- 单位RIKEN
