https://doi.org/10.1051/epjconf/202024201004
Measurements of short-lived fission product yields using monoenergetic neutron and photon beams
1 Duke University, Durham, NC 27708
2 Triangle Universities Nuclear Laboratory, Durham, NC 27708
3 Lawrence Livermore National Laboratory, Livermore, CA 94550
4 Los Alamos National Laboratory, Los Alamos, NM 87544
5 Colorado School of Mines, Golden, CO 80401
6 North Carolina State University, Raleigh, NC 27695
* e-mail: sfinch@tunl.duke.edu
Published online: 28 September 2020
A joint TUNL-LLNL-LANL collaboration was formed to measure the absolute fission product yields from the 235 U, 238 U, and 239 Pu isotopes. Our goal is to study the energy evolution of fission products using monoenergetic beams. In order to extend our successful fission product-yield studies to include products with shorter half-lives, a RApid Belt-driven Irradiated Target Transfer System, named RABITTS, was constructed. This system allows us to perform cyclic activation and quantify fission products with γ-ray spectroscopy using HPGe detectors. Both a 1 meter and 10 meter transfer system have been developed, with transit times of 0.4 and 1.1 seconds, respectively. Using these systems, we have measured sub-second half-lives. Our goal is to measure fission product yields from neutron-induced fission with En = 0.5 − 14.8 MeV and photofission with Eγ = 8 − 15 MeV. A detailed characterization of the system’s performance is presented, including preliminary fission product measurements, and the expected sensitivity.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
