New isotope Sg264 and decay properties of Sg262264

K. E. Gregorich, J. M. Gates, Ch. E. Düllmann, R. Sudowe, S. L. Nelson, M. A. Garcia, I. Dragojević, C. M. Folden III, S. H. Neumann, D. C. Hoffman, and H. Nitsche
Phys. Rev. C 74, 044611 – Published 23 October 2006

Abstract

New isotope, Sg264, was identified using the U238(Si30, xn)Sg268x reaction and excitation functions for Sg262264 were measured. Sg264 decays by spontaneous fission with a half-life of 3711+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 153+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.

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  • Received 20 June 2006

DOI:https://doi.org/10.1103/PhysRevC.74.044611

©2006 American Physical Society

Authors & Affiliations

K. E. Gregorich1, J. M. Gates1,2, Ch. E. Düllmann3, R. Sudowe1, S. L. Nelson1,2, M. A. Garcia1,2, I. Dragojević1,2, C. M. Folden III4, S. H. Neumann5, D. C. Hoffman1,2, and H. Nitsche1,2

  • 1Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 2Department of Chemistry, University of California, Berkeley, California 94720, USA
  • 3Gesellschaft für Schwerionenforschung, D-64291 Darmstadt, Germany
  • 4National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
  • 5Department of Applied Sciences and Technology, Aachen University of Applied Sciences, D-52428 Jülich, Germany

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Vol. 74, Iss. 4 — October 2006

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