Cross-section measurements of the 94Mo(γ,n) and 90Zr(γ,n) reactions using real photons at the HIγS facility
Department of Physics and Astronomy, James Madison University, Harrisonburg, Virginia 22807, USA
2 Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
3 University of North Carolina at Chapel Hill, North Carolina 27516, USA
4 Department of Physics, Duke University, Durham, North Carolina 27708, USA
5 University of Maryland Medical Center, Baltimore, Maryland 21201, USA
* Corresponding author: firstname.lastname@example.org
Published online: 16 May 2018
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 ~ 20 MeV. Neutrons from the (γ,n) reactions were detected using a 4π assembly of 3He proportional counters developed at Los Alamos National Laboratory and presently available at TUNL. While the 94Mo(γ,n) cross section measurement aims to contribute to a broader investigation for understanding the γ-process (the mechanism responsible for the nucleosynthesis of the so-called p-nuclei), the information from the 90Zr(γ,n) data is relevant to constrain QRPA calculations of γ-ray strength functions in this mass region. In this contribution, we will present our preliminary results of the total (γ,n) excitation functions for the two photoneutron reactions on 94Mo and 90Zr.
© The Authors, published by EDP Sciences, 2018
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