Results 261 to 270 of about 1,632,227 (336)

Liquid scintillation counting at ambient temperature

Analytical Biochemistry, 1966
Abstract Ambient-temperature liquid scintillation counting of aqueous samples of up to 2 ml volume realized effciencies of over 80% for 14 C and 20% for 3 H in a dioxane-naphthalene scintillator. The use of external standardization for rapid determination of counting efficiency is presented together with some characteristics of a newly available ...
T C, Hall, C J, Weiser
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2003: A centennial of spinthariscope and scintillation counting

Applied Radiation and Isotopes, 2004
In 1903 W. Crookes demonstrated in England his "spinthariscope" for the visual observation of individual scintillations caused by alpha particles impinging upon a ZnS screen. In contrast to the analogue methods of radiation measurements in that time the spinthariscope was a single-particle counter, being the precursor of scintillation counters since ...
Z I, Kolar, W, Den Hollander
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Scintillation counting: Adsorption and solvation problems

Analytical Biochemistry, 1972
Abstract Problems were encountered in accurately determining counting rates of basic tritiated compounds in several scintillation cocktails. These difficulties derived from adsorption losses. In addition, a significant difference in counting efficiency for hydrophilic and hydrophobic materials may be detected in some solutions: internal ...
P F, Davison, L P, Andersson
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Liquid scintillation counting in nuclear medicine

Seminars in Nuclear Medicine, 1973
Many of the radionuclides used in nuclear medicine can be measured by liquid scintillation (LS) counting, and the technique is the only practical approach to counting low-energy β emissions. This review is intended to be a brief exposition of the capabilities of LS counting and of some precautions that should be observed.
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Liquid scintillation counting for determination of radionuclides in environmental and nuclear application

Journal of Radioanalytical and Nuclear Chemistry, 2018
X. Hou
semanticscholar   +1 more source

Liquid Scintillation Counting of Tritium in Urine

Physics in Medicine and Biology, 1961
An instrument is described using a single cooled photomultiplier for routine analysis of tritium in urine. The quenching effects and luminescence of urine treated by various methods are determined. For urine treated with activated charcoal the average activity required to double the background counting rate is 2 nanocuries per ml with an efficiency of ...
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Rapid method for determination of 90Sr in seawater by liquid scintillation counting with an extractive scintillator.

Talanta: The International Journal of Pure and Applied Analytical Chemistry, 2018
M. Uesugi, R. Watanabe, Hiroaki Sakai, A. Yokoyama   +3 more
semanticscholar   +1 more source

Quenching Correction in Liquid Scintillation Counting

1966
Two types of quenching are encountered in liquid scintillation counting, chemical and color quenching. Chemical quenching is caused by the presence of nonfluorescent molecules in the liquid scintillator system which interfere with the energy transfer between the solvent and the organic scintillator.
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A simple efficient liquid scintillator for counting aqueous solutions in a liquid scintillation counter

, 1960
G. Bray
semanticscholar   +1 more source

Phosphorescence in Liquid Scintillation Counting of Proteins

Science, 1958
In the investigation of alcoholic solutions of the quaternary base Hyamine for the counting of proteins and tissues, a phosphorescence phenomenon was encountered when working with larger weights of the substances. The protein- Hyamine solutions were usually heated between 50 and 70 d C for periods ranging from 1/2 hr to several hours.
openaire   +2 more sources