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X ray storage performance of KCl:Eu(2+) with high cumulated dose.
MedLine Citation:
PMID:  24778460     Owner:  NLM     Status:  Publisher    
The effects of high cumulative radiation dose on the luminescence properties of KCl:Eu(2+) are investigated. Pellet samples of KCl:Eu(2+) were given doses of up to 200 kGy at the Louisiana State University Synchrotron facility. After synchrotron irradiation, samples were optically bleached and given a clinical dose of 2 Gy from a 6 MV medical linear accelerator. Optical properties were evaluated using photostimulated luminescence (PSL), photoluminescence (PL), and temperature-dependent PSL measurements. For a cumulated dose of up to 5-10 kGy, the PSL emission intensity increased by 15% compared to the PSL signal with no radiation history. For doses higher than 10 kGy, the PSL emission intensity retained at least 70% of the original intensity. Spatial correlation of the charge storage centers increased for doses up to 5 kGy and then decreased for higher cumulative doses. Emission band at 975 nm was attributed to transitions of Eu(1+). PL spectra showed an intense peak centered at 420 nm for all cumulative doses. The results of this work show that KCl:Eu(2+) storage phosphors are excellent reusable materials for radiation therapy dosimetry.
Rachael A Hansel; Zhiyan Xiao; Lei Zhang; H Harold Li
Publication Detail:
Journal Detail:
Title:  Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms     Volume:  326     ISSN:  0168-583X     ISO Abbreviation:  Nucl Instrum Methods Phys Res B     Publication Date:  2014 May 
Date Detail:
Created Date:  2014-4-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9881766     Medline TA:  Nucl Instrum Methods Phys Res B     Country:  -    
Other Details:
Languages:  ENG     Pagination:  178-181     Citation Subset:  -    
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