Fast neutron and gamma-ray dosimetry with imaging plates

摘要

An imaging plate (IP) is a passive integrating detector capable of medium-term storage of ionizing energy. A visible laser scan can be used to liberate a number of visible photons proportional to the amount of energy trapped. An IP is sensitive to ionizing particles of any energy, whatsoever, to neutrons and to photons. It is linear in response over 4-5 decades. We have studied the response of IN to neutrons emitted by Pu-Be and Am-Be sources in differential measurements that correct for the gamma -ray component from the neutron source. The dose threshold for fast neutrons, as well as for (CO)-C-60 gamma -rays, could thus be determined. (C) 2001 Elsevier Science Ltd. All rights reserved. [References: 10]