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Experimental Investigation of Mass Efficiency Curve for Alpha Radioactivity Counting Using a Gas-proportional Detector by T.M. Semkow; A. Bari; P.P. Parekh; D.K. Haines; H. Gao; A.N. Bolden; K.S. Dahms; S.C. Scarpitta; R.E. Thern; S. Velazquez is a Physics and Astronomy article available to read on EtoBox.

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Gross alpha counting of evaporated water residues offers a simple method for screening alpha radioactivity in water for both public health and emergency purposes. The evaporation process for water has been improved by using a combination of roughening of the surface of counting planchettes, two-stage evaporation, and temperature-controlled block heating. The efficiency of the gas-proportional detector for alpha-particle detection in water residues was studied as a function of sample mass-thickness in the range between 0.1 and 13 mg cm(-2). The effect of alpha energy on the efficiency, as well as moisture absorption on the samples, were studied using (230)Th, (238)U, (239)Pu, (241)Am, and (244)Cm radionuclides. Also, alpha-to-beta crosstalk was investigated as a function of sample mass for (230)Th, (238)U, (239)Pu, (241)Am, and (244)Cm. The improved method can also be applied for gross alpha detection in biological fluids.

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Author

T.M. Semkow; A. Bari; P.P. Parekh; D.K. Haines; H. Gao; A.N. Bolden; K.S. Dahms; S.C. Scarpitta; R.E. Thern; S. Velazquez

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0969-8043)

Published

2004

Language

EN

Field

Physics and Astronomy (Physical Sciences)