Comparison of Thermoluminescence Dosimeter’s Response to Neutron and Gamma in a Mixed Radiation Field

Abstract

Measuring radiation dose in a mixed radiation field cannot be performed by using only one dosimeter, but a pair of dosimeters, TLD600 and TLD700 can be successfully used to estimate that radiation dose. Therefore, in the present study, the response of TLD600 and TLD700 to neutron/gamma mixed radiation field was deeply discussed. Moreover, the sensitivity and stability of TLD600 and TLD700 were studied. A strong correlation between TL output signal intensity of TLD700 to gamma dose appeared, with a linear coefficient of R 2 = 0.99. Likewise, a strong correlation between TL output signal intensity of TLD600 to gamma dose and neutron irradiation was also evident, with a linear coefficient of R 2 = 0.99. Thus, TLD700 can be applied to measure gamma dose with good sensitivity, while TLD600 can be applied to measure both gamma and neutron dose. Hence, a combination of TLD700 and TLD600 can be successfully employed to assess the radiation doses characterizing a mixed radiation field of neutron and gamma rays.

Workplace radiation dose monitoring in diagnostic radiography Centres of the Lake Zone Regions of Tanzania

“…During the reading process the TLDs were treated for 5 seconds at a preheat temperature of 150 ºC, and the heating rate of 15 ºC s -1 to attain a temperature of 300 ºC at a time of 13.3 s. The glow curve of field TLDs is proportional to the dose receive at the field which measure the whole body dose i.e. the higher the irradiated dose the stronger TL readout signal [11].…”