Results 241 to 250 of about 120,161 (290)

Counting Statistics for Liquid Scintillation Counting

Analytical Chemistry, 1961
The way in which the errors associated with individual countings of a sample by liquid scintillation techniques are compounded in the calculation of a net disintegration rate was investigated. The standard deviation of rates calculated from duplicate samples is compared with the standard deviation calculated from a propagation of error equation. At the
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Cerenkov counting as a complement to liquid scintillation counting

Applied Radiation and Isotopes, 1996
Abstract A commercially available spectrometer was calibrated for liquid scintillatoion (LS) and Cerenkov counting efficiency (CCE) using National Institute of Standards and Technology traceable solutions. The CCE increased linearly over a 3 order of magnitude range in 40 K β activity, and by 42% per MeV as β-energies increased from 0.300 to 3.54 ...
Salvatore C Scarpitta, Isabel M. Fisenne
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Measurement of 14C activity by liquid scintillation counting

Applied Radiation and Isotopes, 2009
Measurement of (14)C activity in various types of samples has been performed in the Zagreb Radiocarbon Laboratory since 1968 by proportional counting technique and since 2001 by liquid scintillation counting (LSC) technique by using LSC Quantulus 1220.
Jadranka Barešić, Nada Horvatinčić, Bogomil Obelić, I. Krajcar Bronić   +3 more
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Liquid scintillation counting

The International Journal of Applied Radiation and Isotopes, 1959
F. Newton Hayes, Carlos G. Bell
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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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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.
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Liquid Scintillation and Čerenkov Counting

1975
Liquid scintillation counting is of relatively recent origin and has been widely used in various fields of research. The flexibility, versatility, and sensitivity of liquid scintillators allow their use in large volume as well as in small volume detectors.
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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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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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Liquid scintillation counting of tritiated water

The International Journal of Applied Radiation and Isotopes, 1960
The performance of single photomultiplier and twophotomultiplier coincidence systems for counting of tritiated water were investigated for comparison. The factors contributing to the background and ihe effects of long- lived scintillator phosphorescence are discussed. The counting efficiencies of the two systems were determined. (D.L.C.)
J.F. Cameron, I.S. Boyce
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