Performance of new Rh target X-ray tube for X-ray ... | 合法醫療器材資訊網

W,PtandCrtargetX-raytubehaveusuallybeenusedforX-rayfluorescenceanalysis,andMoandCu.targettubehavealsobeensometimesemployed.

Abstract

W, Pt and Cr target X-ray tube have usually been used for X-ray fluorescence analysis, and Mo and Cu. target tube have also been sometimes employed. However, these tubes have following defects. First, it is very hard to determine W by W target tube, Pt by Pt target tube, Cr by Cr target tube, Mo by Mo target tube, and Cu by Cu target tube. But these elements. must be analyzed quite often.Second, a fluorescence yield of heavy elements by W and Pt target tube is very high, while that of light elements is very low. Therefore the analytical precision of the light elements is very poor.As to the character of Cr target tube, it is opposed to the above tubes, that is, the yield of heavy elements isvery low.Being attempted to investigate a new tube without the above defects, Rh target X-ray tube was developed. The fluorescence yield of heavy and light elements by this tube is about 2 times and about 11.2 times as much as the yield by Cr tube,...