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High-precision 4π liquid scintillation counting
The International Journal of Applied Radiation and Isotopes, 1965Abstract A precise method for the determination of the absolute activity of radioactive solutions by means of liquid scintillation counting is described in detail. The method is based on the extrapolation of the integral spectrum to zero energy. The reproducibility for α- and for β-emitters with a maximum energy higher than 150 keV is generally ...
R, VANINBROUKX, A, SPERNOL
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A new scintillator for liquid scintillation counting
The International Journal of Applied Radiation and Isotopes, 1967Abstract This report describes the results of investigations carried out with a new scintillator: 2-(4′-t-Butylphenyl)-5-(4″-biphenylyl)-1,3,4-oxdiazole (Butyl-PBD). Counting efficiencies and background counts of variously quenched toluene and dioxane systems containing Butyl-PBD have been compared with similar systems containing PPO and DM-POPOP as ...
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Liquid scintillation counting of blood
The International Journal of Applied Radiation and Isotopes, 1965Abstract Several methods are compared for liquid scintillation counting of blood samples. The radioactive products are extracted from the blood either directly with the scintillation solvent system “Polyether 611” or with solvents such as dioxane or ethanol. The last-mentioned extracts are counted in a hyamine-Cl-touluene system. Blood contacted with
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1979
Carbon —14 and tritium are β− emitting radioisotopes with β− emissions of very low energy which are extremely difficult to detect with any form of window counter, due to self-absorption of the β− particles and their absorption within the counter window.
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Carbon —14 and tritium are β− emitting radioisotopes with β− emissions of very low energy which are extremely difficult to detect with any form of window counter, due to self-absorption of the β− particles and their absorption within the counter window.
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Liquid scintillation counting of chlorophyll
The International Journal of Applied Radiation and Isotopes, 1975Abstract A precise and reproducible method of liquid scintillation counting was worked out for measuring the radioactivity of 14 C-labelled chlorophyll a and chlorophyll b solutions without previous bleaching. The spurious count rate caused by luminescence of the scintillant-chlorophyll system is eliminated by using a suitable scintillant and by
F. Frič +2 more
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Liquid scintillation counting in nuclear medicine
Seminars in Nuclear Medicine, 1973Many 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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Counting Statistics for Liquid Scintillation Counting
Analytical Chemistry, 1961The 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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Quenching Correction in Liquid Scintillation Counting
1966Two 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 H2S35
The International Journal of Applied Radiation and Isotopes, 1961The cap of a Packard sample vial was modifiod to permit ready injection of the gas and yet prevent leakage. A series of such vials containing increasing volumes of Hsub 2/S/sup 35/ was countod after various periods to determine the linearity of the calibration curve (a measure of both quenching and loss of gas to the vapor space) and the change of the ...
B.E. Gordon, H.R. Lukens, W. ten Hove
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Liquid Scintillation and Čerenkov Counting
1975Liquid 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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