Time resolved photoluminescence from a phosphate glass (GD-300) irradiated with heavy ions and gamma rays.
The time-resolved photoluminescence from a phosphate-glass photoluminescence dosimeter (GD-300) was compared for different quality radiations: relativistic heavy ions (12C and 40Ar) and 60Co gamma rays. The intensities of photoluminescence afterglow at 2-7 micro(s) after pulsed UV excitation, i.e., in the time range used for conventional dosimetry, soon reached stable conditions for all radiations. Whereas the early photoluminescence emission at the range less than 0.4 micro(s) was notably unstable for gamma rays only; it continued decreasing even at 2 d after irradiation. In contrast, the photoluminescence afterglows for the heavy ions were stable over the whole range after excitation. These results indicate that the process of photoluminescence-center formation is different for heavy ions and gamma rays.
Yasuda
Hiroshi
H
National Institute of Radiological Sciences, Anagawa 4-9-1, Inage, Chiba-shi 263-8555, Japan. h_yasuda@nirs.go.jp
Ishidoya
Tatsuyo
T
D001128:Argon; D001417:Background Radiation; D002244:Carbon; D003037:Cobalt Radioisotopes; D019544:Equipment Failure Analysis / Q000379:methods; D005720:Gamma Rays; D005898:Glass; D020450:Heavy Ions; D007834:Lasers; D008422:Materials Testing / Q000379:methods*; D010710:Phosphates / Q000528:radiation effects*; D012680:Sensitivity and Specificity; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation / Q000379:methods*; D013997:Time Factors; D014466:Ultraviolet Rays
D003037:Cobalt Radioisotopes; D010710:Phosphates; D001128:Argon; D002244:Carbon