Temperature dependence of CsI(Tl) gamma-ray excited scintillation characteristics

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1993

DOI:https://doi.org/10.2172/10187904· OSTI ID:10187904

Valentine, John David ^[1]

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1. Univ. of Michigan, Ann Arbor, MI (United States)

Gamma-ray excited emission spectrum, absolute scintillation yield, rise and decay time constants, and thermoluminescence emissions of CsI(Tl) were measured at -100 to +50 C, for crystals from 4 different vendors. The thermoluminescence glow curves were the only property that varied significantly from crystal to crystal; room temperature operation in current mode could be susceptible to temperature fluctuations. The CsI(Tl) emission spectrum has emission bands peaking around 400 and 560 nm; the former band disappears between -50 and -75 C. The RT absolute scintillation yield was calculated to be 65,500{plus_minus}4,100 photons/MeV. The two primary decay time constants increases about exponentially with inverse temperature. An ultra-fast decay component was confirmed. Applications are discussed.

• Research Organization: Oak Ridge Inst. for Science and Education, TN (United States)
• Sponsoring Organization: USDOE; Department of Health and Human Services
• DOE Contract Number: AC05-76OR00033; FG02-86NE37969; AC03-76SF00098
• OSTI ID: 10187904
• Report Number(s): DOE/OR/00033--T542; ON: DE94000836; CNN: Grant P01-HL25840; R01-CA48002
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606
440100
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CESIUM IODIDES
EMISSION SPECTRA
GAMMA DETECTION
GAMMA RADIATION
INORGANIC PHOSPHORS
KINETICS
PHOTODIODES
PHYSICAL PROPERTIES
RADIATION INSTRUMENTATION
RADIOLUMINESCENCE
SCINTILLATIONS
TEMPERATURE DEPENDENCE
THALLIUM ADDITIONS
THERMOLUMINESCENCE
TIME DEPENDENCE
YIELDS