Abstract:
:A thermoluminescence (TL) study relevant to radiation dosimetry has been carried out for X-ray irradiated biotite mineral under un-annealed and different annealed (473, 573, 673 and 773 K) conditions. Some significant variations in dosimetric characteristics have been observed with annealing treatment. Due to generation of an additional shallow trap level at depth 0.78 eV in 673 and 773 K annealed samples, the dose response is found to improve. For the 773 K annealed sample, a linear dose response has been observed from 10 to 1100 mGy. The fading is ∼13% within 5 d after irradiation and onward it reduces to 7% up to 60 d. Reproducibility of this (773 K) sample is excellent. After 10 recycles the coefficient of variations in the results for the 60, 180 and 1000 mGy dose-irradiated samples are found to be 0.97, 1.31 and 1.03%, respectively. The potential use of biotite as a natural X-ray dosemeter is discussed.
journal_name
Radiat Prot Dosimetryjournal_title
Radiation protection dosimetryauthors
Kalita JM,Wary Gdoi
10.1093/rpd/ncu289subject
Has Abstractpub_date
2015-04-01 00:00:00pages
239-43issue
3eissn
0144-8420issn
1742-3406pii
ncu289journal_volume
164pub_type
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