Positron Annihilation Lifetime Study on free Volume Changes in TLD by Gamma - irradiation A.A.AL-Bayati *

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Baghdad Science Journal

Abstract

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-

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Journal BS. Positron Annihilation Lifetime Study on free Volume Changes in TLD by Gamma - irradiation. BSJ [Internet]. 7Mar.2004 [cited 7Dec.2019];1(1):144-8. Available from: http://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/515
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