The carrier capture and recombination processes in Ln{sup 3+}-activated scintillators

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · IEEE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/23.502312· OSTI ID:276591

Wojtowicz, A J; Wisniewski, D ^[1]; Lempicki, A; Brecher, C ^[1]; Balcerzyk, M ^[2]

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1. Boston Univ., MA (United States). Chemistry Dept.
2. N. Copernicus Univ., Torun (Poland). Inst. of Physics

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{sub 4}:Ce, YAIO{sub 3}:Ce, LuAlO{sub 3}:Ce) the charge state involved in the scintillation mechanism is Ce{sup 4+}, while in the other (LuPO{sub 4}:Yb, YbPO{sub 4}) it is Yb{sup 2+}. The possibility of a nonradiative recombination via Ce and Yb ions is also considered and found highly unlikely in accordance with experimental results.

• DOE Contract Number: FG02-90ER61033
• OSTI ID: 276591
• Journal Information: IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 3Pt3 Vol. 43; ISSN 0018-9499; ISSN IETNAE
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
ALUMINATES
CERIUM IONS
DOPED MATERIALS
ENERGY TRANSFER
INORGANIC PHOSPHORS
LUTETIUM COMPOUNDS
LUTETIUM PHOSPHATES
MATERIALS
PERFORMANCE
SCINTILLATIONS
SOLID SCINTILLATION DETECTORS
YTTERBIUM IONS
YTTERBIUM PHOSPHATES
YTTRIUM COMPOUNDS