Neutron-induced γ-ray production cross sections for the first excited-state transitions in 20Ne and 22Ne

Background: Neutron-induced reactions are a significant concern for experiments that require extremely low levels of radioactive backgrounds. Measurements of γ-ray production cross sections over a wide energy range help to predict and identify neutron backgrounds in these experiments. Purpose: The purpose of this experiment is to determine partial γ-ray production cross sections for neutron-induced reactions in natural neon. Methods: The broad spectrum neutron beam at the Los Alamos Neutron Science Center (LANSCE) was used for the measurement. Gamma rays from neutron-induced reactions were detected using the GErmanium Array for Neutron Induced Excitations (GEANIE). Results: Partial γ-ray cross sections were measured for the first excited-state transitions in 20Ne and 22Ne. The measured cross sections were compared to the talys and CoH³ nuclear reaction codes. Conclusions: These are the first experimental data for (n,n^′) reactions in neon. In addition to providing data to aid in the prediction and identification of neutron backgrounds in low-background experiments, these new measurements will help refine cross-section predictions in a mass region where models are not well constrained.