Open AccessPositron Annihilation Lifetime Study on free Volume Changes in TLD by Gamma - irradiation
Author(s) -
Baghdad Science Journal
Publication year - 2004
Publication title -
mağallaẗ baġdād li-l-ʿulūm
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.167
H-Index - 6
eISSN - 2411-7986
pISSN - 2078-8665
DOI - 10.21123/bsj.1.1.144-148
Subject(s) - thermoluminescent dosimeter , annihilation , volume (thermodynamics) , positron annihilation , positron , irradiation , gamma irradiation , gamma ray , dosimeter , nuclear medicine , radiochemistry , materials science , nuclear physics , dosimetry , chemistry , physics , medicine , thermodynamics , electron
Positron annihilation lifetime has been utilized for the first time to investigate the free - volume hole properties in thermolumenscent dosimeter ( TLD ) as a function of gamma-dosc . The hole volume, free volume fraction determined form orthopsitronium lifetime are found to be ?lamatically increase to large values , and then to minimum values as a function ofgamma-dose . The free - volume holes size is found to be 0.163nm’ and to have maximum of 0.166nm^ at the gamma-dose of 0.1 and 0.8 Gy, respectively-