Pulsed-Neutron Die-Away Experiments for Plastics and Neutron Thermal Scattering Laws Daniel Siefman, Shauntay Coleman, Jordan Northrop, William Zywiec, Jesse Holmes, Michael Zerkle, David Heinrichs and Catherine Percher EPJ Web of Conf., 284 (2023) 17012 Published online: 26 May 2023 DOI: 10.1051/epjconf/202328417012