New Method for Shielded Gamma Sources Activity Determination - G-factor Method
The results of the development of new gamma-spectrometry method for shield attenuation factor are presented. The value of shield attenuation factor is excerpted from shielded gamma source spectrum directly. No priory information about the shield or shield material sampling is used. The gamma spectrum of the unshielded source is not used too. The only one peak in the spectrum is enough to calculate the shield attenuation value. The method name is G-factor method. The results of G-factor method testing with HPGe and NaI(Tl) spectrometers are presented for H2O, Al, Cu and Pb as shielding materials for shield attenuation factor value range from 1 to 103.