An approach based on the SIR measurement model for determining the ionization chamber efficiency curves, and a study of 65Zn and 201Tl photon emission intensities.
The measurement model used to determine ionization chamber efficiency curves accounts from the outset for impurity corrections and beta spectrum shapes. The curves are represented by exponentials of polynomials whose coefficients are adjusted using non-linear least-squares minimization. The curves are validated by comparing with SIR key comparison reference values (KCRVs) and other published curves. The associated covariance matrix is also evaluated. Deviations from model predictions for 65Zn and 201Tl using recommended nuclear data are studied.
Michotte
C
C
Bureau International des Poids et Mesures (BIPM), Pavillon de Breteuil, F-92312 Sèvres Cedex, France. cmichotte@bipm.org
Pearce
A K
AK
Cox
M G
MG
Gostely
J-J
JJ
D000465:Algorithms; D002138:Calibration / Q000592:standards; D004867:Equipment Design; D019544:Equipment Failure Analysis / Q000592:standards; D017408:Guidelines as Topic; D008956:Models, Chemical; D017785:Photons; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods / Q000592:standards*; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013794:Thallium Radioisotopes / Q000032:analysis* / Q000592:standards; D015037:Zinc Radioisotopes / Q000032:analysis* / Q000592:standards
D013794:Thallium Radioisotopes; D015037:Zinc Radioisotopes