Title :
Influence of temperature treatment on radiation stability of plastic scintillator and wavelength shifter
Author :
Bicken, B. ; Dannemann, A. ; Holm, U. ; Neumann, Th ; Wick, K.
Author_Institution :
I. Inst. fur Experimentalphys., Hamburg Univ., Germany
Abstract :
The influence of temperature treatment before or after irradiation on the radiation damage of plastic scintillators and wavelength shifters has been measured. The PMMA (polymethyl methacrylate)-based wavelength shifters show strong recovery for heating in argon after irradiation, whereas the polystyrene-based scintillator SCSN-38 in air suffers from heating not only before but also after irradiation. UV absorbants added to wavelength shifter material Y-7 in PMMA are responsible for additional radiation damage in the scintillator/wavelength shifter system SCSN-38/Y-7 if their cutoff wavelengths are higher than 360 nm.<>
Keywords :
gamma-ray effects; heat treatment; polymers; scintillation counters; 360 nm; Ar; PMMA; SCSN-38; UV absorbants; Y-7; gamma irradiation; plastic scintillators; polystyrene-based scintillator; radiation damage; radiation stability; temperature treatment; wavelength shifters; Argon; Gases; Heat recovery; Heating; Machining; Plastics; Production; Stability; Temperature; Wavelength measurement;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE
Conference_Location :
Santa Fe, NM, USA
Print_ISBN :
0-7803-0513-2
DOI :
10.1109/NSSMIC.1991.259160
