Excited states in Te-139 and the properties of r-process nuclei with Z approximately 50 and N > 86

Urban, W.; Phillips, W. R.; Schulz, N.; Gall, B. J. P.; Ahmad, I.; Bentaleb, M.; Durell, J. L.; Jones, M. A.; Leddy, M. J.; Lubkiewicz, E.

doi:10.1103/PhysRevC.62.044315

Excited states in Te-139 and the properties of r-process nuclei with Z approximately 50 and N > 86

2000

5 pages

Published in:

Phys.Rev.C 62 (2000) 044315

DOI:

10.1103/PhysRevC.62.044315

View in:

reference search23 citations

Citations per year

Abstract: (APS)

Excited states in 139Te were observed for the first time, using EUROGAM2 multidetector array to measure prompt-γ radiation following the spontaneous fission of 248Cm. The systematic behavior of excitation energies in the N=87 isotones and the multipolarity measurements suggest spin 7/2− for the ground state and 9/2− for the 271.0 keV level in 139Te. The 271.0 keV level most likely corresponds to the νh9/2 single-particle excitation. A shape transition from spherical to prolate Te isotopes is observed at the neutron number N=87, in accord with the Hartree-Fock plus BCS, PES calculations. Predictions for excitations in the 137Sn nucleus are made based on the extended systematics obtained for the N=87 isotones.

References(13)

Figures(0)