Evidence for a 3.6 minute isomeric 12 − state of the πh 11 2/−1 vi 13 2/−1 configuration in 206 Tl and effective two-particle interactions
作者： I. Bergstr�m , J. Blomqvist , C. J. Herrlander , C. G. Lind�n
DOI: 10.1007/BF01409176
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摘要: Using the204Hg(α, pn)-reaction andα-particles of energies 39–55 MeV, we have found an isomeric 3.6 min 12− state in206Tl at 2,642.9 keV which has the two-hole configurationπh 11 2/−1 vi 13 The decays mainly by anE5 transition energy 1,021.4 to a 7+ 1,621.5 whose main configuration isπs 1 There is, in addition, evidence for weak 565 keVM 4 branch 8+ 2,078 should beπh vf 5 . stretched cascade ofγ-rays states following values ofJπ and excitation energy: − + , 1,405.4 keV; 4−, 952.1 2−, 265.8 0−, 0 keV. configurations these areπh vp ,πd 3 andπs respectively. From nuclear masses of208Pb,207Pb,207Tl, and206Tl experimental it is possible obtain proton hole-neutron hole interaction in206Tl. This compared with calculations Kuo Herling discrepancies are discussed. 12−→8+M4 rate reduced because destructive interference between protonh11/2→d3/2 neutroni13/2→f5/2 contributions. magnitude reduction accurately reproduced wave functions Herling. 12−→7+E5 about twice as large single-holeπh πs rate. deviation fully explained admixtures state, given
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