The PDOZ is a personal electronic dosimeter designed to measure exposure to ionizing radiation in environments such as research laboratories, hospitals, and nuclear facilities. Its aim is to detect, discriminate, and measure the dose and dose rate from beta particles, gamma rays, and neutrons in real-time in mixed radiation fields of unknown sources. The device features three scintillators: a thin BC408 for beta particles, a thick BC408 for neutrons, and the CsI(Tl) for gamma rays. At the bottom surface of each scintillator, two silicon photomultipliers (SiPMs) are attached to a total of six SiPMs. Geant4 simulations were used to optimize the materials and thicknesses of the scintillators. Preliminary experimental measurements with ⁹⁰Sr, ⁶⁰Co and ¹³⁷Cs sources show good agreement with the simulations for the single scintillator PDOZ configuration based on BC408. Further comparisons between simulated and experimental results for ⁹⁰Sr, ⁶⁰Co and ¹³⁷Cs, as well as neutron detection efficiency tests, are ongoing with the complete geometry of the PDOZ.

1. L. Salvi et al., “PDOZ: innovative personal electronic dosimeter for electron and gamma H*(d) dosimetry,” J. Instrum., vol. 18, no. 8, P08010, Aug. 2023.
   DOI: 10.1088/1748-0221/18/08/P08010
2. BEAMIDE, INFN, Perugia, Italy, 2021.
   Retrieved from: https://www.beamide.com
   Retrieved on: Jul. 16, 2025
3. Scintillators Model CsI(Tl), CsI(Na) and pure CsI datasheet, Epic-Crystal, Kunshan, China, 2012.
   Retrieved from: https://www.epic-crystal.com/scintillation-crystals/csi-crystal.html
   Retrieved on: Jul. 16, 2025
4. Scintillator Model BC408 datasheet, Luxium Solutions, Hiram (OH), USA.
   Retrieved from: https://www.luxiumsolutions.com/radiation-detection-scintillators/plastic-scintillators/bc400-bc404-bc408-bc412-bc416
   Retrieved on: Jul. 16, 2025
5. Radiation protection instrumentation – Measurement of personal dose equivalents Hp(10) and Hp(0,07) for X, gamma, neutron and beta radiations – Direct reading personal dose equivalent meters, IEC 61526:2010, Jul. 22, 2010.
   Retrieved from: https://webstore.iec.ch/en/publication/5540 Retrieved on: Jul. 16, 2025
6. S. Agostinelli et al., Geant4 simulation toolkit version 10.7, CERN, Geneva, Switzerland, 2020.
   Retrieved from: https://geant4.web.cern.ch/
   Retrieved on: Jul. 16, 2025.
7. Determination of dose equivalent resulting from external radiation sources, Rep. 39, ICRU, Bethesda (MD), USA, 1985.
   Retrieved from: https://www.icru.org/report/determination-of-dose-equivalents-resulting-from-external-radiation-sources-report-39/
   Retrieved on: Jul. 16, 2025
8. Conversion coefficients for use in radiological protection against external radiation, ICRP Publication 74, ICRP, Oxford (UK), 1996.
   Retrieved from: https://www.icrp.org/publication.asp?id=icrp%20publication%2074
   Retrieved on: Jul. 16, 2025
9. J-Series Silicon Photomultiplier (SiPM) Sensors datasheet, Onsemi, Scottsdale (AZ), USA.
   Retrieved from: https://www.onsemi.com/products/sensors/photodetectors-sipm-spad/silicon-photomultipliers-sipm/j-series
   Retrieved on: Jul. 16, 2025
10. GAGG Scintillator datasheet, Advatech, London, UK.
    Retrieved from: https://www.advatech-uk.co.uk/gagg_ce.html
    Retrieved on: Jul. 16, 2025
11. EJ-254 Scintillator datasheet, Eljen Technology, Sweetwater (TX), USA.
    Retrieved from: https://eljentechnology.com/images/products/dat_sheets/EJ-254.pdf
    Retrieved on: Jul. 16, 2025
12. EJ-276D and EJ-276G Scintillators datasheet, Eljen Technology, Sweetwater (TX), USA.
    Retrieved from: https://eljentechnology.com/products/plastic-scintillators/ej-276
    Retrieved on: Jul. 16, 2025
13. CLLBC Scintillator datasheet, Berkeley Nucleonics Corp, San Rafael (CA), USA.
    Retrieved from: http://www.berkeleynucleonics.com/sites/default/files/products/resources/cllbc_datasheet_bnc.pdf
    Retrieved on: Jul. 16, 2025
14. AutoCAD version 2023, Autodesk, Inc., San Rafael (CA), USA, 2023.
    Retrieved from: https://www.autodesk.com/products/autocad/overview
    Retrieved on: Jul. 16, 2025
15. MRADSIM Converter, MRADSIM, Perugia, Italy, 2023.
    Retrieved from: https://www.mradsim.com/converter
    Retrieved on: Jul. 16, 2025