Use of a detector CZT for verification of shields against neutron in 3 linear accelerators in clinical use

This paper describes how to use the reaction of thermal neutrons (n?) ¹13Cd, ¹14 Cd with the cadmium in an alloy of cadmium and zinc Telluride (CZT) semiconductor detector. 558 keV photons produced can be detected by the own semiconductor. In this way have an agile method for the measurement of the neutron flux transmitted by shielding and which provides an almost immediate reading of the result. This method applies three accelerators linear in that checks the correct shield on their respective treatment rooms. (Author)