Recovery and permanent radiation damage of plastic scintillators at different dose rates

Author

Bicken, B. ; Holm, U. ; Marckmann, T. ; Wick, K. ; Rohde, M.

Author_Institution

Inst. fuer Experimentalphys., Hamburg Univ., West Germany

Volume

38

Issue

2

fYear

1991

fDate

4/1/1991 12:00:00 AM

Firstpage

188

Lastpage

193

Abstract

The radiation stability of plastic scintillators and wavelength shifters for the calorimeter of the ZEUS detector has been investigated by irradiating them with protons, a ⁶⁰Co source, and depleted uranium. Changes in light yield, absorption length, and absorption coefficient have been measured for storage in inert and oxygen atmospheres during and after irradiation. Radiation doses of up to 40 kGy with dose rates of 30 to 2000 Gy/h have been applied. The polystyrene-based scintillator SCSN-38 and the wavelength shifters Y-7 and K-27 in PMMA (polymethyl methacrylate) initially show a strong additional absorption but then recover in air to a low permanent damage (at 10 kGy) which is proportional to the applied dose. Series investigations on samples of all production cycles of the ZEUS scintillators at high dose rates show only minor differences in radiation hardness

Keywords

calorimeters; gamma-ray effects; proton effects; scintillation counters; ⁶⁰Co source; K-27; PMMA; SCSN-38; Y-7; ZEUS detector; absorption coefficient; absorption length; calorimeter; depleted; dose rates; light yield; permanent radiation damage; plastic scintillators; polymethyl methacrylate; polystyrene-based scintillator; protons; radiation hardness; radiation stability; wavelength shifters; Absorption; Atmospheric measurements; Atmospheric waves; Gas detectors; Length measurement; Plastics; Protons; Radiation detectors; Stability; Wavelength measurement;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.289295

Filename

289295