Investigation of ¹⁸⁶Re via radiative thermal-neutron capture on ¹⁸⁵Re

Authors

David A. Matters [*], Air Force Institute of Technology
Andrew G. Lerch, Defense Threat Reduction Agency
A. M. Hurst, University of California - Berkeley
L. Szentmiklosi, Hungarian Academy of Sciences
J. J. Carroll, U. S. Army Research Laboratory
B. Detwiler, Youngstown State University
Zs. Revay, Technische Universitat Munchen
John W. McClory, Air Force Institute of TechnologyFollow
Stephen R. McHale, Defense Threat Reduction Agency
R. B. Firestone, University of California - Berkeley
B. W. Sleaford, Lawrence Livermore National Laboratory
M. Krticka, Charles University in Prague
T. Belgya, Hungarian Academy of Sciences

Document Type

Article

Publication Date

5-2016

Abstract

Partial ��-ray production cross sections and the total radiative thermal-neutron capture cross section for the ¹⁸⁵Re(n,��)¹⁸⁶Re reaction were measured using the Prompt Gamma Activation Analysis facility at the Budapest Research Reactor with an enriched ¹⁸⁵Re target. The ¹⁸⁶Re cross sections were standardized using well-known ³⁵Cl(n,��)³⁶Cl cross sections from irradiation of a stoichiometric ^natReCl₃ target. The resulting cross sections for transitions feeding the ¹⁸⁶Re ground state from low-lying levels below a cutoff energy of E_c=746keV were combined with a modeled probability of ground-state feeding from levels above E_c to arrive at a total cross section of σ₀=111(6)b for radiative thermal-neutron capture on ¹⁸⁵Re. A comparison of modeled discrete-level populations with measured transition intensities led to proposed revisions for seven tentative spin-parity assignments in the adopted level scheme for ¹⁸⁶Re. Additionally, 102 primary �� rays were measured, including 50 previously unknown. A neutron-separation energy of S_n=6179.59(5)keV was determined from a global least-squares fit of the measured ��-ray energies to the known ¹⁸⁶Re decay scheme. The total capture cross section and separation energy results are comparable to earlier measurements of these values.

Comments

©2016 American Physical Society

Posted on AFIT Scholar in accordance with policies of the publisher and copyright holder for this article, American Physical Society (APS). https://journals.aps.org/copyrightFAQ.html

This article appeared in volume 93 of Phys Rev C and may be found as cited below.
Sourced from the version of record at APS.

[*] Author note: David Matters was an AFIT PhD candidate at the time of publication.

DOI

10.1103/PhysRevC.93.054319

Source Publication

Physical Review C (ISSN 2469-9985 | e-ISSN 2469-9993)

Recommended Citation

Matters, D.A. et al. (2016). "Investigation of 186Re via radiative thermal-neutron capture on 185Re". Phys. Rev. C 93, 054319. https://doi.org/10.1103/PhysRevC.93.054319