^(192)Ir源两种刻度方法的比较

Study on the method to scale ^（192）Ir radioactivity

目的 通过对^（192）Ir源的再次刻度， 校准源活度的精确值。材料与方法： 用电离室法，分别测量源在水介质中和自由空气中的照射量率。结果： 两种方法在刻度^（192）Ir源活性上得到的结果是一致的。结论： 利用空气比释动能法可以对^（192）Ir源进行精确刻度。

purpose To calibrate the accurate value of ^（192）Ir radioactivity again． materials and methods To measure the dose rate of radioactivity in water and at air by ion chamber． results: To scale the activity of ^（192）Ir radioactivity by air Kerma is agreement to the scaling method according to the JJG 773－92． conclusion The investigation demonstrates that the accurate value of ^（192）Ir radioactivity can be calibrated by the method of air Kerma．