We present experimental data on ultracold neutron (UCN) production in solid oxygen from 5 K to 50 K. The experiment used 3 cells of different dimensions in order to study the excess UCN elastic scattering in s-O2 due to source density non-uniformities. We present a combined χ2 analysis with the aid of Monte-Carlo simulations which contain the detailed physics of UCN transport as well as cold neutron attenuation. The results validate the UCN production and upscattering cross-sections extracted from the dynamic structure function derived from inelastic neutron scattering, and illustrate the role of magnetic scattering in enhancing UCN production in s-O2.
@article{arxiv.1103.5093,
title = {Understanding Ultracold Neutron Production in Oxygen Solids from Volume and Temperature Dependent Yields},
author = {C. -Y. Liu and C. M. Lavelle and D. J. Salvat and W. Fox and G. Manus and P. M. McChesney and Y. Shin and A. Couture},
journal= {arXiv preprint arXiv:1103.5093},
year = {2011}
}