Article,

Re-187(gamma,n) cross section close to and above the neutron threshold

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Phys. Rev. C, (Februar 2006)
DOI: 10.1103/PhysRevC.73.025804

Abstract

The neutron capture cross section of the unstable nucleus Re-186 is studied by investigating the inverse photodisintegration reaction Re-187(gamma, n). The special interest of the s-process branching point Re-186 is related to the question of possible s-process contributions to the abundance of the r-process chronometer nucleus Re-187. We use the photoactivation technique to measure photodisintegration rates. Our experimental results are in good agreement with two different statistical model calculations. Although the cross sections predicted by both models for the inverse reaction Re-186(n, gamma) is too low to remove the overproduction of Os-186; the two predicted neutron-capture cross sections differ by a factor of 2.4; this calls for future theoretical study.

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