Document Type
Article
Publication Date
11-2015
Abstract
The spallation neutron source at the Los Alamos Neutron Science Center Weapons Neutron Research facility was used to populate excited states in 186Re via (n,2nγ) reactions on an enriched 187Re target. Gamma rays were detected with the GErmanium Array for Neutron Induced Excitations spectrometer, a Compton-suppressed array of 18 HPGe detectors. Incident neutron energies were determined by the time-of-flight technique and used to obtain γ-ray excitation functions for the purpose of identifying γ rays by reaction channel. Analysis of the singles γ-ray spectrum gated on the neutron energy range 10≤En≤25MeV resulted in five transitions and one level added to the 186Re level scheme. The additions include the placement of three γ rays at 266.7, 381.2, and 647.7 keV which have been identified as feeding the 2.0×105yr, Jπ=(8+) isomer and yield an improved value of 148.2(5)keV for the isomer energy. These transitions may have astrophysical implications related to the use of the Re-Os cosmochronometer. Abstract © APS.
DOI
10.1103/PhysRevC.92.054304
Source Publication
Physical Review C - Nuclear Physics
Recommended Citation
Matters, D. A., et al. (2015). New transitions and feeding of the Jπ=(8+) isomer in Re186. Physical Review C (Nuclear Physics), 92(5), 54304. https://doi.org/10.1103/PhysRevC.92.054304
Comments
©2015 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 92 of Phys Rev C and may be found as cited below. Sourced from the version of record at APS.
Plain text title: New transitions and feeding of the Jπ=(8+) isomer in Re 186
[*] Author note: David Matters was an AFIT PhD candidate at the time of publication.