Extension of the 4$pi$$beta$--$gamma$ coincidence technique: two dimensional extrapolation

Journal Article · Sun Jun 01 04:00:00 EDT 1975 · Metrologia, v. 11, no. 2, pp. 67-72

OSTI ID:4131402

Smith, D; Stuart, L E.H.

As an extension of the 4$pi$$beta$$-$$gamma$ coincidence technique, it is shown that for some radionuclides, the $beta$ count rate should be expressed as a function of at least two observed $beta$ efficiencies, and that the absolute disintegration rate can be obtained by a simultaneous extrapolation to 100% efficiency in the two or more dimensions. Measurements on $sup 57$Co and $sup 134$Cs are described as examples. For these nuclides, the separated efficiency functions are shown to be linear in theory as well as in practice. Thus a major source of systematic uncertainty in efficiency extrapolation, that due to the unknown form of the extrapolation function, is greatly reduced. (orig.)

• Research Organization: National Physical Lab., Teddington (UK). Div. of Radiation Science
• NSA Number: NSA-33-011086
• OSTI ID: 4131402
• Journal Information: Metrologia, v. 11, no. 2, pp. 67-72, Journal Name: Metrologia, v. 11, no. 2, pp. 67-72; ISSN MTRGA
• Country of Publication: Germany
• Language: English

Related Subjects

*BETA DETECTION-- EFFICIENCY
*COINCIDENCE METHODS-- TWO-DIMENSIONAL CALCULATIONS
643702*
COUNTING RATES
DATA PROCESSING
EXTRAPOLATION
N72300* --Physics (Radiation & Shielding)--Radiation Source Calibration & Standardization