A kinetic model of diode detector response to pulsed radiation beams.

A kinetic model of diode detector response to pulsed radiation beams.
Phys Med Biol. 2019 Sep 13;:
Authors: Neira S, Brualla-Gonzalez L, Prieto-Pena J, Gomez F, Pardo-Montero J
Abstract
Diodes dosimeters present a complex response to pulsed beams, with diode sensitivity varying with dose-per-pulse, monitor unit rate (time between pulses) or number of integrated pulses. Such response is caused by the complex kinetics of the interplay among charge carriers, recombination-generation centers, which capture excess minority charge carriers and facilitate recombination with a majority charge carrier, and traps with energy levels close to the conduction/valence band, which can trap and release charge carriers. This behavior has been well characterized experimentally, and modeled with phenomenological models.
 
 In this work we present a kinetic multi-compartment model of the response of diode detectors, which includes the interplay among charge carriers, recombination-generation centers, and traps. The model can qualitatively fit experimental data extracted from the literature on diode response versus dose-per-pulse, monitor unit rate (time between pulses), or number of integrated pulses. In this regard, our work provides further insight on the response of diode detectors, and a theoretical framework for the development of simple phenomenological models.
PMID: 31519004 [PubMed - as supplied by publisher]

Source: Physics in Medicine and Biology - September 12, 2019 Category: Physics Authors: Neira S, Brualla-Gonzalez L, Prieto-Pena J, Gomez F, Pardo-Montero J Tags: Phys Med Biol Source Type: research