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Scintillation counting of beta activity on filter paper
Science (New York, N.Y.)
|May 27, 1960
Summary
This study introduces a direct scintillation counting method for beta activity on filter paper using monoisopropylbiphenyl. The technique simplifies sample preparation and shows linear counting rates for various isotopes.
Area of Science:
- Radiochemistry and Analytical Chemistry
Background:
- Traditional methods for beta activity measurement often require complex sample preparation.
- Direct measurement techniques can improve efficiency and reduce potential errors.
Purpose of the Study:
- To investigate the feasibility of direct scintillation counting of beta activity on filter paper.
- To evaluate the performance of monoisopropylbiphenyl as a low-volatility solvent for this application.
Main Methods:
- Beta activity was directly measured on filter paper wetted with a monoisopropylbiphenyl scintillator solution.
- The method was tested with isotopes including iodine-131, phosphorus-32, sodium-22, and carbon-14.
Main Results:
- A linear relationship was observed between the counting rate and the total activity for the tested isotopes.
- Counting efficiencies were successfully determined for the direct measurement method.
Conclusions:
- Direct scintillation counting on filter paper using monoisopropylbiphenyl is a viable and attractive method.
- The absence of sample preparation and direct measurement offer significant advantages in beta activity analysis.
Keywords:
RADIOMETRY
