Comparison of the NIST and NPL Air kerma standards used for X-Ray Measurements Between 10kV and 80kV

摘要

A direct comparison was made between the air kerma primary standards used for the measurements of low-energy x rays at the National Institute of Standards and Technology (NIST)and the National Physical Laboratory(NPL).The comparison was conducted at the NPL using NPL reference radiation qualities between 10kV and 80kV.The results show the primary airkerma standards to agree within 0.6% of their values for beam qualities up to 80kV.