Experiments searching for weak interacting massive particles with noble gases such as liquid argon require very low detection thresholds for nuclear recoils. A determination of the scintillation efficiency is crucial to quantify the response of the detector at low energy. We report the results obtained with a small liquid argon cell using a monoenergetic neutron beam produced by a deuterium-deuterium fusion source. The light yield relative to electrons was measured for six argon recoil energies between 11 and 120 keV at zero electric drift field.
@article{arxiv.1504.07878,
title = {Scintillation efficiency of liquid argon in low energy neutron-argon scattering},
author = {W. Creus and Y. Allkofer and C. Amsler and A. D. Ferella and J. Rochet and L. Scotto-Lavina and M. Walter},
journal= {arXiv preprint arXiv:1504.07878},
year = {2015}
}