论文部分内容阅读
生物和辐射毒物样品中低活性~(90)Sr的分析一般是从母核中分离以后进行短寿命子体~(90)Y的测量。按照标准放化分析程序,对混合放射性核素样品,首先要灰化或湿法氧化进行破坏,然后进行适当的放射化学分离。为了保证绝大部分~(90)Y(T_(1/2)=64.1小时)生长,通常在进行放射性测量前需要放置10～14天。如果在刚分离出的~(90)Sr样上计数迅速生长着的子体栘素诱发的切伦科夫辐射,那么放置时间可大大缩短。调
The analysis of low activity 90 Sr in biological and radiotoxic samples is generally the measurement of the short-lived daughter, 90 Y, after separation from the mother nucleus. In accordance with standard radiochemical analysis procedures, samples of mixed radionuclides are first destructed by ashing or wet oxidation and then subjected to appropriate radiochemical separation. In order to ensure the growth of most of (90) Y (T ½ (1/2) = 64.1 hours), it is usually necessary to leave it for 10 to 14 days before radioactivity measurement. If Cerenkov-induced Cerenkov radiation is rapidly grown on ~ (90) Sr samples that have just been separated out, the placement time can be greatly reduced. Tune