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Cerium-Activated Lanthanum Beryllate as A Gamma Detector Material

Published online by Cambridge University Press:  21 February 2011

J. Bart Czirr
Affiliation:
MSI Photogenics Division, 455 North University, Provo, Utah 84601
Manuel Berrondo
Affiliation:
Brigham Young University, Department of Physics & Astronomy, Provo, Utah 84602
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Abtract

We have tested a single crystal of Ce-activated lanthanum beryllate BEL(Ce) as a potential gamma detector material. The density (6.1 g.cm−3) and decay time (50 ns) are competitive with other recently developed materials. The scintillation efficiency is 57- to -95% that of BGO. For an excitation wavelength of 340 nm, the emission spectrum is a broad peak centered at 450 nm. The H2 annealed sample is transparent for wavelengths greater than 400 nm. We are continuing a program to improve the scintillation efficiency by varying the crystal growth conditions.

The crystal was prepared by M. Long and E.W. O'Dell of AlliedSignal, Inc., using the Czochralski technique.

Type
Research Article
Copyright
Copyright © Materials Research Society 1994

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