Distribution of positron annihilation lifetime components
Other Title(s)
توزيع مركبات الطيف الزمني لفناء البوزترون
Joint Authors
Said, Muna Ahmad
Salman, Ahmad Abd al-Razzaq
Source
Issue
Vol. 5, Issue 2 (30 Jun. 2008), pp.265-272, 8 p.
Publisher
University of Baghdad College of Science for Women
Publication Date
2008-06-30
Country of Publication
Iraq
No. of Pages
8
Main Subjects
Abstract EN
The intensities of the positron annihilation lifetime components are shown to be related to the free volume model, and the theoretical value of the ratio between the singlet to the triplet state intensities, described by the ratio η, is shown to follow an empirical model.
An application of the model on some experimental data shows that the calculated value of the ratio η approaches the theoretical value, which is 1/3.
Furthermore, the relation between the free volume hole fraction, Fh, with the free volume Vh described by the constant C is related to τ3.
Therefore, the deviation of the constant C and the ratio η that are reported and differ from the theoretical values for similar researches could be corrected.
When data are collected by means of positron annihilation lifetime spectroscopy (PALS), the spread-intensity model is suggested to explain this correction.
Keywords: positron annihilation in solids, annihilation intensity.
American Psychological Association (APA)
Salman, Ahmad Abd al-Razzaq& Said, Muna Ahmad. 2008. Distribution of positron annihilation lifetime components. Um-Salama Science Journal،Vol. 5, no. 2, pp.265-272.
https://search.emarefa.net/detail/BIM-367529
Modern Language Association (MLA)
Salman, Ahmad Abd al-Razzaq& Said, Muna Ahmad. Distribution of positron annihilation lifetime components. Um-Salama Science Journal Vol. 5, no. 2 (2008), pp.265-272.
https://search.emarefa.net/detail/BIM-367529
American Medical Association (AMA)
Salman, Ahmad Abd al-Razzaq& Said, Muna Ahmad. Distribution of positron annihilation lifetime components. Um-Salama Science Journal. 2008. Vol. 5, no. 2, pp.265-272.
https://search.emarefa.net/detail/BIM-367529
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 271
Record ID
BIM-367529