| 1. | Therefore it should be planned carefully . the properties of snm ( nuclide mass , isotopic composition , distribution , matrix , etc . ) are significant to nda instrument response , these physical properties must be well known throughout the preparation procedure
因此，制备nda核标准样品必须非常仔细的计划，特种核材料的特性(核素的质量、成分、分布和基体)需要确切地知道。 |
