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Radiation Protection Dosimetry Advance Access originally published online on June 16, 2007
Radiation Protection Dosimetry 2008 128(1):43-48; doi:10.1093/rpd/ncm232
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© The Author 2007. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Estimation of bremsstrahlung photon energy in the environment of high-energy electron accelerator using CaSO4:Dy based TL dosemeter

A. K. Bakshi1,*, M. K. Nayak2, G. Haridas2, S. Chatterjee1 and R. K. Kher1

1 Radiological Physics & Advisory Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
2 Health Physics Unit, Radiation Safety System Division, Bhabha Atomic Research Centre, Mumbai 400 085, India

* Corresponding author: akbakshi123{at}yahoo.com

Received January 31, 2007, amended March 19, 2007, accepted March 25, 2007

High-energy bremsstrahlung X rays constitute the major radiation hazard to working personnel around the high-energy electron accelerators. Thermoluminescent (TL) dosemeter system based on CaSO4:Dy Teflon disc used in the routine individual monitoring was used to estimate the bremsstruhlung photon energy at different locations of the experimental hall of 450-MeV synchrotron accelerator. The response of TL discs under different filter regions of the dosemeter system undergo change with photon energy due to the lack of build up and interaction of photon in the metal filters. This change in the response of the discs used to estimate the energy of the bremsstrauhlung photon in conjunction with suitable calibration curve generated using known photon energy from medical linear accelerator. The photon energies estimated were in the range 1–4 MeV, depending on the locations.


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