Characterization of a thin photodiode as a routine dosimeter for low-dose radiation processing applications

• Published in: Radiation physics and chemistry (Oxford, England : 1993) Vol. 198; p. 110200
• Main Authors: Gonçalves, Josemary A.C., Mangiarotti, Alessio, Bueno, Carmen C.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.09.2022
• Subjects: Gamma dosimetry; Radiation processing dosimetry; Si PIN Diode dosimeter; Gamma dosimetry; Si PIN Diode dosimeter; Radiation processing dosimetry
• ISSN: 0969-806X; 1879-0895
• DOI: 10.1016/j.radphyschem.2022.110200

The characterization of a dosimetry system based on a commercial PIN photodiode as a routine dosimeter in a 60Co industrial facility is reported. The main parameters of the dose rate response (repeatability, reproducibility, and angular dependence) and the dose response (dependence on both dose rate and accumulated dose) are investigated. The results obtained, within a dose rate range of 3.7–52.8 Gy/h and doses up to 200 Gy, fully adhere to the standard protocols established for radiation processing dosimetry. The diode performance as a routine dosimeter is validated by the good overall agreement with radiochromic films and alanine dosimetry. •SFH 206K exhibits linear dose response under industrial irradiation conditions.•High repeatability of the current signals regardless the accumulated dose.•Linear dose rate response with good long-term stability.•Low ageing due to radiation damage extends the dose lifespan to 15 kGy.•The diode response favorably compares to that attained with the radiochromic film.