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

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

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aps..aprh15001k&link_type=abstract

American Physical Society, 2008 APS April Meeting and HEDP/HEDLA Meeting, April 11-15, 2008, abstract #H15.001

Physics

Scientific paper

We have initiated a program to measure neutron-induced cross sections on ^187Re using monoenergetic neutron beams and an array of HPGe γ-ray detectors at TUNL. Our emphasis is on measuring transitions in the ^187Re(n, 2n ) reaction that populate the long-lived isomeric state, ^ 186mRe. These data are needed to decrease uncertainties in the ^187 Re/^187Os cosmochronometer, which dates the r-process nucleosynthesis. Results from a first run using a pulsed 12 MeV neutron beam will be presented, and an overview of planned measurements that will measure the excitation function making use of both prompt γ-ray detection and activation techniques will be given.

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