Response of Two Bonner Spheres for 2.5 and 14.7 MeV Neutrons Determined with Two Different Methods

摘要

The fluence response of a 3.5'' and a 9.5'' Bonner sphere detector system for monoenergetic neutrons of 2.5 MeV and 14.7 MeV has been measured. Two methods were applied to determine the corrections due to neutrons scattered by the air and the walls of the irradiation hall: the shadow-cone technique and the distance-variation technique. The agreement of the results obtained by the two methods shows that both can be applied to radiation fields produced at the accelerator facility. The influence of target-scattered neutrons on the determination of the fluence response is discussed. (ERA citation 14:006388)