Efficiency calibration of a mini-orange type beta-spectrometer by the beta sup - -spectrum of sup 9 sup 0 Sr

Abstract

A specific method for efficiency calibration of a mini-orange type beta-spectrometer by means of the continuous beta sup - -spectrum of sup 9 sup 0 Sr and the conversion electron spectrum of sup 2 sup 0 sup 7 Bi in the energy range from 500 to 2200 keV has been elaborated. In the experiment typical SmCo sub 5 magnets (6A and 8A) were used. An accuracy of efficiency determination was 5-10 %