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First time measurement of gamma‐ray excited LaBr 3 :5% Ce 3+ and LaCl 3 :10% Ce 3+ temperature dependent properties
Author(s) -
Bizarri G.,
de Haas J. T. M.,
Dorenbos P.,
van Eijk C. W. E.
Publication year - 2006
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200622081
Subject(s) - excited state , yield (engineering) , atmospheric temperature range , analytical chemistry (journal) , scintillator , excitation , gamma ray , range (aeronautics) , physics , materials science , atomic physics , chemistry , nuclear physics , optics , thermodynamics , quantum mechanics , chromatography , detector , composite material
We have measured for the first time the temperature dependence of LaBr 3 :5% Ce 3+ and LaCl 3 :10% Ce 3+ gamma‐ray excited light yields and decay curves between 100 and 600 K. Under gamma‐ray excitation, both scintillators present a very good thermal stability over the entire temperature range. The light yield of LaBr 3 is maximum at 100 K and decreases monotonously from 100 to 600 K. The decrease at 600 K does not exceed 15% of the maximum value. The light yield of LaCl 3 is maximum at 600 K and decreases with decreasing temperatures. The lowest value is reached at 150 K and corresponds to 90% of the maximum light yield recorded at 600 K. Our results show that LaBr 3 :5% Ce 3+ and LaCl 3 :10% Ce 3+ crystals can be used in applications where temperature conditions are extreme such as in oil well logging. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)