New isotope Sg264 and decay properties of Sg262-264
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New isotope, Sg264, was identified using the U238(Si30, xn)Sg268-x reaction and excitation functions for Sg262-264 were measured. Sg264 decays by spontaneous fission with a half-life of 37-11+27 ms. The spontaneous fission branch for 0.9-s Sg263 was measured for the first time and found to be (13±8)%. Sg262 decays by spontaneous fission with a 15-3+5 ms half-life. Spontaneous fission partial half-life systematics are evaluated for even-even Sg isotopes from Sg258 through Sg266, spanning the transition region between the N=152,Z=100 and N=162,Z=108 deformed shells. © 2006 The American Physical Society.
author list (cited authors)
Gregorich, K. E., Gates, J. M., Düllmann, C. E., Sudowe, R., Nelson, S. L., Garcia, M. A., ... Nitsche, H.