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Room temperature X-ray and positron annihilation lifetime spectroscopic studies of cavansite crystals
- Authors
- Kumar, B. V. Suresh; Ravikumar, H. B.; Prakash, A. P. Gnana; Girish, H. N; Ishigaki, Tadashi; Madhusudan, Puttaswamy
- Issue Date
- Nov-2019
- Publisher
- IOP PUBLISHING LTD
- Citation
- JAPANESE JOURNAL OF APPLIED PHYSICS, v.58, no.11, pp.1 - 5
- Indexed
- SCIE
SCOPUS
- Journal Title
- JAPANESE JOURNAL OF APPLIED PHYSICS
- Volume
- 58
- Number
- 11
- Start Page
- 1
- End Page
- 5
- ISSN
- 0021-4922
- Abstract
- The positron annihilation lifetime spectroscopy (PALS) of cavansite crystals collected from Wagholi, Pune district of Western Maharastra, India were characterized by Co-60 gamma radiation with an irradiation dose of 1 Mrad and 3 Mrad at ambient conditions. The influence of gamma-irradiation on the pore size and its content on cavansite structure were examined. The studies suggest ortho-positronium (o-Ps) lifetime (tau(3)) and intensity (I-3) decreased upon gamma-irradiation. The decreased o-Ps lifetime (tau(3)) is attributed to the collapse of the framework structure of cavansite crystal. In addition, the reduction in o-Ps intensity (I-3) is known to decrease o-Ps annihilation sites because of free radical reactions.
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Related Researcher
- Madhusudan, Puttaswamy
- 서울 부총장(서울) (서울 창의융합교육원)