FEASIBILITY STUDY FOR IDENTIFICATION OF STATIC AND DYNAMIC EXPOSURE USING CCD IMAGING TECHNIQUE FOR Caso4:Dy TL DOSEMETERS.
The occupational exposure incurred by the radiation workers due to the external radiation is estimated using personal dosemeter placed on the human body during the monitoring period. In certain situations, it is required to determine whether the dosemeter alone was exposed accidentally/intentionally in radiation field (static exposure) or was exposed while being worn by a worker moving in his workplace (dynamic exposure). The present thermoluminscent (TL) based personnel monitoring systems are not capable of distinguishing between the above stated (static and dynamic) exposure conditions. The feasibility of a new methodology developed using the charge coupled device based imaging technique for identification of the static/dynamic exposure of CaSO4:Dy based TL detectors for low energy photons has been investigated. The techniques for the qualitative and the quantitative assessments of the exposure conditions are presented in this paper.
Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai-40085, India.
Kshama
K
Srivastava
Industrial Plants Safety Division, Atomic Energy Regulatory Board, Mumbai-40094, India.
Seepika
S
Soin
Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai-40085, India.
B K
BK
Sapra
Radiological Safety Division, Atomic Energy Regulatory Board, Mumbai-40094, India.
P
P
Ratna
Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai-40085, India.
D
D
Datta
D004867:Equipment Design; D005240:Feasibility Studies; D006801:Humans; D016273:Occupational Exposure / Q000032:analysis*; D017785:Photons; D011829:Radiation Dosage; D000072232:Radiation Dosimeters; D011859:Radiography / Q000295:instrumentation*; D014965:X-Rays