An MCNP Feasibility Study for a Switchable Gamma Source

Abstract

Gamma radiation sources are being used for an array of everyday applications, from portal monitors for homeland security to blood sterilization, and as calibration sources in nuclear medicine. This paper presents the preliminary feasibility study of a source that allows the gamma radiation to be turned on and off. The gamma radiation is produced via a sequence of nuclear reactions: an (, n) reaction, followed by an (n, ) reaction. Parametric studies in MCNP5 were performed to investigate the effect of different moderators, neutron absorbers, and geometries on the gamma flux and gamma dose produced. The results of the feasibility study are discussed in the context of nuclear medicine applications.