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Scintillation Mechanism and Radiation Damage in CexLa1-xF3 Crystals

Published online by Cambridge University Press:  21 February 2011

A. J. Wojtowicz ,
A. Lempicki ,
D. Wisniewski ,
C. Brecher ,
R. H. Bartram ,
C. Woody ,
P. Levy ,
S. Stoll ,
J. Kierstead  and
C. Pedrini
...Show all authors
A. J. Wojtowicz
Affiliation:
Chemistry Dept., Boston University, 590 Commonwealth Ave., Boston, MA 02215, USA Institute of Physics, N. Copernicus University, Grudziadzka 5, 87-100 Torun, Poland
A. Lempicki
Affiliation:
Chemistry Dept., Boston University, 590 Commonwealth Ave., Boston, MA 02215, USA
D. Wisniewski
Affiliation:
Chemistry Dept., Boston University, 590 Commonwealth Ave., Boston, MA 02215, USA Institute of Physics, N. Copernicus University, Grudziadzka 5, 87-100 Torun, Poland
C. Brecher
Affiliation:
Chemistry Dept., Boston University, 590 Commonwealth Ave., Boston, MA 02215, USA
R. H. Bartram
Affiliation:
Physics Dept., University of Connecticut, 2152 Hillside Road, Storrs, CT 06269, USA
C. Woody
Affiliation:
Physics Dept., Brookhaven National Laboratory, Upton, New York 11973, USA
P. Levy
Affiliation:
Physics Dept., Brookhaven National Laboratory, Upton, New York 11973, USA
S. Stoll
Affiliation:
Physics Dept., Brookhaven National Laboratory, Upton, New York 11973, USA
J. Kierstead
Affiliation:
Physics Dept., Brookhaven National Laboratory, Upton, New York 11973, USA
C. Pedrini
Affiliation:
LPCML URA 442 du CNRS, Bat 205 Universite Lyon 1,43 Bd du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
D. Bouttet
Affiliation:
LPCML URA 442 du CNRS, Bat 205 Universite Lyon 1,43 Bd du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
CZ. Koepke
Affiliation:
Institute of Physics, N. Copernicus University, Grudziadzka 5, 87-100 Torun, Poland
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Abstract

Recent spectroscopic and radiation damage experiments on a series of CexLa1-xF3 crystals suggest that the scintillation light output is limited by an unusual quenching mechanism, which also plays a major role in minimizing radiation-induced damage. The intensity of the radiation-induced absorptions is a strong function ofthe Ce content x, reaching a maximum for x = 0.03 and a minimum for x = 1. This peculiar dependence appears to be due to the influence of deep-lying Ce levels onboth scintillation mechanism and radiation damage. We suggest that various charge transfer processes can explain many aspects of the performance of CexLa1-xF3 scintillators.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 348 , 1994 , 455
Copyright
Copyright © Materials Research Society 1994

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References

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