Health & Environmental Research Online (HERO)


Print Feedback Export to File
6607525 
Journal Article 
Effects of pulsed ionizing radiation on light absorption by plastic scintillators 
Berezin, IA; Sten'Gach, IN 
1984 
Yes 
Journal of Applied Spectroscopy
ISSN: 0021-9037
EISSN: 1573-8647 
40 
4 
433-437 
INSPEC:2473338 
Plastic scintillators in the form of solutions of aromatic compounds in polymers are widely used to record short radiation pulses, as these have luminescence decay times of 10-9-10-8 sec. Ionizing radiation produces singlet and triplet excited states, and also positive and negative ions, which leads to deterioration in the transparency. It is necessary to examine the transparency changes, including the recovery after pulsed irradiation, if the pulse repetition time is short, so the subsequent pulses may be recorded with errors because of the damage to the scintillator. The authors have examined the changes in spectral and integral absorption in scintillators based on polystyrene, poly(methyl methacrylate), and a styrene methyl methacrylate copolymer, which contained various additives; the specimens were exposed to single electron pulses from a 15-MeV linear accelerator.