Low-cost target system for neutron activation using a medical cyclotron. Application to the non-destructive analysis of gold and silver

Abstract

A low cost and easily implemented target system for neutron activation was developed that takes advantage of the neutron flux produced as a by-product during the cyclotron production of medical isotopes. Samples are placed in close proximity to an ¹⁸O(p,n)¹⁸F target on a cyclotron operating between 18 and 22 MeV for irradiation. Analysis of the samples by gamma spectroscopy shows that activation is proportional to the neutron exposure, and the mass of the element present in the sample.

Keywords: Analysis; Cyclotron; Gamma spectroscopy; Medical isotopes; Neutron activation; PET; Target system.