Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1988-10-27
1990-01-16
Hannaher, Constantine
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
250328, 250362, G01T 1208, G01T 100
Patent
active
048945455
ABSTRACT:
An efficiency extrapolation method is used in liquid scintillation counting for determining activity in an unknown sample. A dynamic and automatic determination of the range of the pulse height spectrum is used to permit a counting measurement in highly quenched samples, and with isotopes having low energy end points. A selected linear regression equation is extrapolated to provide the determination within a predetermined error established by a least squares condition.
REFERENCES:
patent: 4060728 (1977-11-01), Horrocks
patent: 4761555 (1988-08-01), Ishikawa
"Activity Determination of Disc Samples With Liquid Scintillation Efficiency Tracing Technique," Applied Radiation Isotopes, vol. 37, No. 11, pp. 1147-1149 (1986), Fujii, et al.
"Thermal Neutron Reaction Cross Section Measurements for Fourteen Nuclides With a Liquid Scintillation Spectometer," Takiue, Nuclear Instruments and Methods, vol. 148, pp. 157-161 (1978).
"Mesure Absolue Directe de l'Activite des Emetteurs Purs par Scintillation Liquide," Kolarov, LeGallic & Vatin, Int. J. Appl. radia. Isot., 21, pp. 443-452.
"Radioassay by an Efficiency Tracing Technique Using a Liquid Scintillation Counter," Ishikawa, et al., International Journal of Applied Radiation and Isotopes, vol. 35, No. 6, pp. 463-466 (1984).
"Comments on Aspects of Absolute Activity Measurements Obtained by Liquid Scintillation Counting," Lowenthal, Australian Atomic Energy Commission Research Establishment, Lucas Heights, N.S.W. 2232, pp. 349-362.
Beckman Instruments Inc.
Hannaher Constantine
Harder Paul R.
May William H.
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