Physical Sciences and Mathematics Commons^™

Fission Fragment Isomers Populated Via 6Li+232Th., J. J. Ressler, 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, M. Wiedeking

Physics Faculty Publications

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 [T_1/2=17(2) μs], ¹²³In (T_1/2≳100 μs), and ¹²⁵Sb [T_1/2=25(4) μs]. These isomers are suggested to arise from ν(h_11/2⊗d_3/2)7⁻and ν(h_11/2⊗s_1/2)5⁻ neutron core excitations coupling with the valence proton.