MEASUREMENT OF SECONDARY NEUTRONS AND GAMMA RAYS PRODUCED BY NEUTRON INTERACTIONS WITH NITROGEN AND OXYGEN OVER THE INCIDENT ENERGY RANGE 1 TO 20 MeV

摘要

The spectra of secondary neutrons and gamma rays produced by neutron interaction in thick samples (≈ 1 mean free path) of liquid nitrogen and liquid oxygen have been measured as a function of the incident neutron energy over the range 1 to 20 MeV. Data were taken for angles of 30°, 55°, 90°, and 125°. A linac (ORELA) was used as a neutron source with a 47-m flight path. Incident energy was determined by time-of-flight, while secondary spectra were determined by pulse-height unfolding techniques. The results of the measurements are presented in forms suitable for com¬parison to calculations based on the evaluated data files.