Comparative evaluation of the performance of thin diodes used as on-line dosimeters in radiation processing applications

Josemary A. C. Gonçalves; Alessio Mangiarotti; Carmen C Bueno

doi:10.15392/bjrs.v9i1A.1327

Authors

Josemary A. C. Gonçalves Instituto de Pesquisas Energéticas e Nucleares
Alessio Mangiarotti Instituto de Física, Universidade de São Paulo
Carmen C Bueno Instituto de Pesquisas Energéticas e Nucleares

DOI:

https://doi.org/10.15392/bjrs.v9i1A.1327

Abstract

In this work, we report a comparison between the performance of two samples of commercial PIN photodiodes (SFH206K from Osram and S2506-04 from Hamamatsu) mainly addressing the variation of their current sensitivities with accumulated dose ranging from 0-15 kGy. All the results so far obtained have revealed that the radiation induced currents are linearly dependent on dose rates from 3.65 to 55.64 Gy/h. The current sensitivity of both unirradiated diodes (0.178 nA.h/Gy.mm³) slightly decreases with accumulated dose, namely 0.32%/kGy (SFH206K) and 1.4%/kGy (S2506-04). Although the SFH206K device compares favorably with the S2506-04, both diodes can be considered as a low budge alternative, good enough for on-line dosimetry applications in the field of radiation processing.

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