Simultaneous Measurement of ⁹⁰Sr and ⁹⁰Y by Measuring Their Bremsstrahlung

An effective method is found that⁹⁰Sr and ⁹⁰Y can be measured by measuring the bremsstrahlung produced in a ⁹⁰Sr and ⁹⁰Y sample. According to the metrical principle, the detection efficiency ratio k of ⁹⁰Y to ⁹⁰Sr is obtained by measuring a ⁹⁰Sr sample from which ⁹⁰Y has been removed by extraction of ⁹⁰Y with di(2-ethylhexly) phosphoric acid (HDEHP). The results indicate that the simultaneous measurement of ⁹⁰Sr and ⁹⁰Y is feasible and ⁹⁰Sr-⁹⁰Y can be directly used as the tracer of Y.