Short-lived isomers in fission fragments following bombardment of 45-MeV 6Li on 232Th were examined. Isomers in the A ~ 95,122, and 132 mass regions were observed. New isomeric decays were observed in 121In [T1/2=17(2) μs], 123In (T1/2≳100 μs), and 125Sb [T1/2=25(4) μs]. These isomers are suggested to arise from ν(h11/2⊗d3/2)7−and ν(h11/2⊗s1/2)5− neutron core excitations coupling with the valence proton.
Copyright © 2010 The American Physical Society. This article first appeared in Physical Review C 81, no. 1 (January 6, 2010): 014301: 1-14301: 9. doi:10.1103/PhysRevC.81.014301.
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Ressler, J. J., J. A. Caggiano, C. J. Francy, P. N. Peplowski, J. M. Allmond, C. W. Beausang, L. A. Bernstein, D. L. Bleuel, J. T. Burke, P. Fallon, A. A. Hecht, D. V. Jordan, S. R. Lesher, M. A. McMahan, T. S. Palmer, L. Phair, N. D. Scielzo, P. G. Swearingen, G. A. Warren, and M. Wiedeking. "Fission Fragment Isomers Populated Via 6Li+232Th." Physical Review C 81, no. 1 (January 6, 2010): 014301: 1-14301: 9. doi:10.1103/PhysRevC.81.014301.