TY - JOUR
T1 - Ionizing radiation sensor utilizing radiophotoluminescence in Ag +-activated phosphate glass and its application to environmental radiation monitoring
AU - Miyamoto, Yuka
AU - Kinoshita, Kazuya
AU - Kobayashi, Haruki
AU - Fujiwara, Akihiko
AU - Koyama, Shin
AU - Takei, Yoshinori
AU - Nanto, Hidehito
AU - Yamamoto, Takayoshi
AU - Kurobori, Toshio
AU - Yanagida, Takayuki
AU - Yoshikawa, Akira
AU - Sakakura, Masaaki
AU - Shimotsuma, Yasuhiko
AU - Miura, Kiyotaka
AU - Hirao, Kazuyuki
PY - 2010
Y1 - 2010
N2 - Optical properties such as optical absorption spectrum and radiophotoluminescence (RPL) emission and excitation spectra of Ag +-activated phosphate glass before and after X-ray irradiation were investigated in this study. It is found that the RPL emission spectrum consists of two emission band peaks at about 460 (blue luminescence) and 560 nm (orange luminescence). The excitation spectrum of RPL consists of two excitation bands at about 315 and 360 nm. It is also found that 560 nm RPL peak intensity gradually increases with time after exposure to X-rays, which strongly suggests that the 560 nm RPL peak is ascribed to Ag2+ ions. The 460 nm RPL peak is ascribed to Ag0 ions, because a blue luminescence is observed in femtosecond pulsed laser light-irradiated glass, in which Ag0 ions are produced by the photoreduction process of Ag+ ions in glass. The application of the RPL phenomenon in Ag+-activated phosphate glass to the environmental monitoring of ionizing natural radiation is also demonstrated.
AB - Optical properties such as optical absorption spectrum and radiophotoluminescence (RPL) emission and excitation spectra of Ag +-activated phosphate glass before and after X-ray irradiation were investigated in this study. It is found that the RPL emission spectrum consists of two emission band peaks at about 460 (blue luminescence) and 560 nm (orange luminescence). The excitation spectrum of RPL consists of two excitation bands at about 315 and 360 nm. It is also found that 560 nm RPL peak intensity gradually increases with time after exposure to X-rays, which strongly suggests that the 560 nm RPL peak is ascribed to Ag2+ ions. The 460 nm RPL peak is ascribed to Ag0 ions, because a blue luminescence is observed in femtosecond pulsed laser light-irradiated glass, in which Ag0 ions are produced by the photoreduction process of Ag+ ions in glass. The application of the RPL phenomenon in Ag+-activated phosphate glass to the environmental monitoring of ionizing natural radiation is also demonstrated.
KW - Ag-activated phosphate glass
KW - Environmental radiation
KW - Femtosecond laser pulse
KW - Glass dosemeter
KW - Photoreduction
KW - Radiophotoluminescence
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M3 - Article
AN - SCOPUS:77955123330
SN - 0914-4935
VL - 22
SP - 235
EP - 245
JO - Sensors and Materials
JF - Sensors and Materials
IS - 5
ER -