TY - JOUR
T1 - X-ray storage performance of KCl:Eu2+ with high cumulated dose
AU - Hansel, Rachael A.
AU - Xiao, Zhiyan
AU - Zhang, Lei
AU - Li, H. Harold
N1 - Funding Information:
The authors graciously acknowledge Dr. John Scott and Dr. Varshni Singh at Louisiana State University for their work irradiating our dosimeters at the synchrotron facility. This work was supported in part by NIH Grant No. R01CA148853 .
PY - 2014/5/1
Y1 - 2014/5/1
N2 - The effects of high cumulative radiation dose on the luminescence properties of KCl:Eu2+ are investigated. Pellet samples of KCl:Eu2+ 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 Eu1+. PL spectra showed an intense peak centered at 420 nm for all cumulative doses. The results of this work show that KCl:Eu2+ storage phosphors are excellent reusable materials for radiation therapy dosimetry.
AB - The effects of high cumulative radiation dose on the luminescence properties of KCl:Eu2+ are investigated. Pellet samples of KCl:Eu2+ 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 Eu1+. PL spectra showed an intense peak centered at 420 nm for all cumulative doses. The results of this work show that KCl:Eu2+ storage phosphors are excellent reusable materials for radiation therapy dosimetry.
KW - Photostimulated luminescence
KW - Radiation hardness
KW - Spatial correlation
KW - X-ray storage phosphors
UR - http://www.scopus.com/inward/record.url?scp=84899431010&partnerID=8YFLogxK
U2 - 10.1016/j.nimb.2013.08.067
DO - 10.1016/j.nimb.2013.08.067
M3 - Article
C2 - 24778460
AN - SCOPUS:84899431010
SN - 0168-583X
VL - 326
SP - 178
EP - 181
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
ER -