Zhang Ruyuan Li Luwei Xue Zhaonan. The optimum incident angle for radioisotope excited XRF measurement with a 90° scattering angle and the improvement of source-sample-detector geometry[J]. Nuclear techniques, 1991, (4): 241-244.
Zhang Ruyuan Li Luwei Xue Zhaonan. The optimum incident angle for radioisotope excited XRF measurement with a 90° scattering angle and the improvement of source-sample-detector geometry[J]. Nuclear techniques, 1991, (4): 241-244.DOI:
an expression of the optimum incident anlge was obtained as a function of the ratio of mass absorption coefficients for original and secondary X rays. With the source-sample-detector geometry designed according to the calculated optimum incident angle
the intensity of low energy secondary X ray emitted from a thick sample was increased by 20% and additional 20% improvement in detection efficiency was expected. With an elliptic cone shaped aluminum source collimating aperture
the edge of which was cut at a certain angle
the scattering background could be reduced significantly.