Phosphor thermometry at cryogenic temperatures

Journal Article · Sun Jun 01 00:00:00 EDT 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1148125· OSTI ID:545280

Cates, M R; Beshears, D L; Allison, S W; Simmons, C M ^[1]

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1. Oak Ridge National Laboratory, Oak Ridge Centers for Manufacturing Technology, Oak Ridge, Tennessee 37831-8058 (United States)

The temperature dependence of the lifetimes of two phosphors, La{sub 2}O{sub 2}S:Eu and Mg{sub 4}FGeO{sub 6}:Mn, is presented from 300 to 11 and 140 to 8 K, respectively. Emission from the {sup 5}D{sub 3} state of La{sub 2}O{sub 2}S:Eu reveals a strong temperature dependence from 11 to about 130 K, where the signal becomes too weak to measure accurately. Emission from the {sup 4}F{sub 2} state of Mg{sub 4}FGeO{sub 6}:Mn changes throughout the temperature range measured. Both of these materials are used for higher temperature thermometry applications. This work illustrates their utility down to liquid helium temperatures. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: Oak Ridge National Laboratory
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 545280
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 6 Vol. 68; ISSN RSINAK; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
CRYOGENICS
EUROPIUM ADDITIONS
FLUORINE COMPOUNDS
GERMANIUM OXIDES
LANTHANUM OXIDES
LIFETIME
MAGNESIUM OXIDES
MANGANESE ADDITIONS
PHOSPHORS
SULFUR OXIDES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K