Speaker
Adriana Banu
(James Madison University)
Description
The photodisintegration reaction cross-sections for 94Mo(γ,n) and 90Zr(γ,n) have been experimentally investigated with quasi-monochromatic photon beams at the High Intensity γ-Ray Source (HIγS) facility, Triangle University Nuclear Laboratory (TUNL). The measurements were focused primarily on studying the energy dependence of the photoneutron cross sections, which is the most direct way of testing statistical models, and were performed close to the respective neutron thresholds and above up to ~ 14 MeV. Neutrons from the (γ,n) reactions were detected using a 4π assembly of 3He proportional counters developed at Los Alamos National Laboratory, presently available at TUNL.
The 94Mo(γ,n) and 90Zr(g,n) cross section measurements aim to contribute to a broader investigation for understanding the p-process, the mechanism responsible for the nucleosynthesis of p-nuclei. Our results help to constrain QRPA calculations of γ-ray strength functions in this mass region and show how sensitive the photoneutron rates of astrophysical interest can be to experimental data in the vicinity of the neutron threshold.
Primary authors
Adriana Banu
(James Madison University)
Hugon Karwowski
(TUNL)
Jack Silano
(TUNL)
Stephane Goriely
(Universite Libre de Bruxelles)
