The carrier capture and recombination processes in Ln(3+)-activated scintillators

The ability of activator ions to capture charge carriers and assume a different charge state under ionizing radiation is essential for efficient performance of rare-earth (RE)-doped scintillator materials utilizing the carrier recombination energy. In this paper, the sequence of carrier trapping is...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 1996-06, Vol.43 (3), p.2168-2173
Main Authors: Wojtowicz, A J, Lempicki, A, Wisniewski, D, Balcerzyk, M, Brecher, C
Format: Article
Language:English
Online Access:Get full text
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Summary:The ability of activator ions to capture charge carriers and assume a different charge state under ionizing radiation is essential for efficient performance of rare-earth (RE)-doped scintillator materials utilizing the carrier recombination energy. In this paper, the sequence of carrier trapping is discussed and interpreted using a simple, single-configuration-coordinate model for two different cases: In one case (LuPO(4):Ce, YAlO(3):Ce, LuAlO(3):Ce) the charge state involved in the scintillation mechanism is Ce(4 ), while in the other (LuPO(4):Yb, YbPO(4)) it is Yb(2 ). The possibility of a nonradiative recombination via Ce and Yb ions is also considered and found highly unlikely in accordance with experimental results
ISSN:0018-9499
DOI:10.1109/23.502312