Gregorich, K.E.; Gates, J.M.; Duellmann, Ch.E.; Sudowe, R.; Nelson, S.L.; Garcia, M.A.; Dragojevic, I.; Folden, C.M. III.; Neumann, S.H.; Hoffman, D.C.; Nitsche, H.

New isotope 264Sg and decay properties of 262-264Sg

2006

Author(s): Gregorich, K.E.;
Gates, J.M.;
Duellmann, Ch.E.;
Sudowe, R.;
Nelson, S.L.;
Garcia, M.A.;
Dragojevic, I.;
Folden, C.M. III.;
Neumann, S.H.;
Hoffman, D.C.;
Nitsche, H.
et al.

Abstract

New isotope, 264Sg, was identified using the 38U(30Si,xn)268-xSg reaction and excitation functions for 262-264Sg were measured. 264Sg decays by spontaneous fission with a half life of 37 +27/-11 ms. The spontaneous fission branch for 0.9-s 263Sg was measured for the first time and found to be (13+-8) percent. 262Sg decays by spontaneous fission with a 15 +5/-3 ms half-life. Spontaneous fission partial half-life systematics are evaluated for even-even Sg isotopes from 258Sg through 266Sg, spanning the transition region between the N=152, Z=100 and N=162, Z=108 deformed shells.

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Lawrence Berkeley National Laboratory

New isotope 264Sg and decay properties of 262-264Sg