The Astrophysical ^187Re/^187Os Ratio: Measurement of the ^187Re(n,2n)^186mRe Destruction Cross Section

Details The Astrophysical ^187Re/^187Os Ratio: Measurement of the ^187Re(n,2n)^186mRe Destruction Cross Section The Astrophysical ^187Re/^187Os Ratio: Measurement of the ^187Re(n,2n)^186mRe Destruction Cross Section

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aps..dnp.da079p&link_type=abstract

American Physical Society, 2008 Annual Meeting of the Division of Nuclear Physics, October 23-26, 2008, abstract #DA.079

Physics

Nuclear Physics

Scientific paper

We have continued a program to measure (n,2n) reaction cross sections on ^187Re with an emphasis on population of the ^186mRe isomer with half-life 2 x 10^5 y. We produced 12 MeV quasi-monoenergetic neutrons with the TUNL Tandem Van de Graaf accelerator and a deuterium gas cell, and we measured the ^187Re(n,b)Y cross sections using activation techniques. While various reaction channels were populated in the activation, our emphasis is on the (n,2n) reaction channels, where ^186Re is populated. Of specific interest is the population of ^186mRe, which has an extremely long lifetime, which complicates the measurement intended. This data is intended to reduce uncertainties in the ^187Re/^187Os cosmochronometer.

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