Excited states in 217Ra populated in the α decay of 221Th
作者： E. Parr , J. F. Smith , P. T. Greenlees , K. Auranen , R. Chapman
DOI: 10.1103/PHYSREVC.102.054335
关键词: Excited state 、 Physics 、 Atomic physics 、 Spectroscopy 、 Spherical shell
摘要: Fine structure in the α decay of Th90221, populating excited states Ra88217, was studied using αγ-coincidence spectroscopy. Two α-decay branches from Th221 have been newly observed, with Eα(keV)[bα(%)]=7951(8)[0.14(3)] and 8247(3)[1.51(12)], together three previously known branches. Also, two new Ra217 were identified at E = 177 227 keV. The ground-state configurations odd-A, N 131 transitional isotones above Pb208 are interpreted their fine systematics considered terms predictions spherical shell reflection-asymmetric models.
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