New neutron-rich isotope: W190

P. E. Haustein, E. M. Franz, S. Katcoff, N. A. Morcos, H. A. Smith, Jr., and T. E. Ward
Phys. Rev. C 14, 645 – Published 1 August 1976
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Abstract

A new neutron-rich isotope, W190, was produced by Os192(n,2pn)W190 (25-200-MeV neutrons) and by Os192(p,3p)W190 (92-MeV protons). Chemically separated sources were used to study its β and γ decay and the following characteristics were observed: T12=30.0±1.5 min; Eβ=0.95±0.07 MeV; Eγ=157.6 and 162.1 keV. A decay scheme for W190 is proposed based on the experimental data and on theoretical predictions for the excited level structure of Re190. A Qβ- of 1.27 MeV was inferred from β-γ coincidence measurements.

RADIOACTIVITY W190 [from Os192(n,2pn), Os192(p,3p)]; measured T12, Eβ, Eγ, Iγ, βγ coin; deduced logft, ICC, multipolarities. Re190 deduced levels, J, π, Nilsson assignments. Re190 calculated theoretical level structure. Enriched targets, radiochemistry, Ge(Li) detectors.

  • Received 19 May 1976

DOI:https://doi.org/10.1103/PhysRevC.14.645

©1976 American Physical Society

Authors & Affiliations

P. E. Haustein, E. M. Franz, S. Katcoff, and N. A. Morcos*

  • Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973

H. A. Smith, Jr. and T. E. Ward

  • Indiana University Cyclotron Facility, Bloomington, Indiana 47401

  • *Present address: E. R. Squibb and Sons, Inc., Georges Rd., New Brunswick, New Jersey 08903.

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Vol. 14, Iss. 2 — August 1976

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