The thesis was finished in May 1989 for the Master degree of Science from Insitute of Physics, National Tsing Hua University, Taiwan. It was advised by Prof. Shiu-chin Wu and originally written in Chinese.

Abstract. The proton and deutron beam were used in this experiment to investigate the mechanism of PIXE (Particale Induced X-ray Emission). In this experiment, both gold and lead were used as thin film targets. The L_alpha and L_l X-ray were detected simultaneously by a SLP (lithium drifted silicon low energy photon spectrometer) detector and the ratio of the emission cross sections of these two lines was obtained directly. The energy range was between 0.5 and 1.5 MeV for proton beam, and between 0.6 and 2.0 MeV for deutron beam. For the theoretical calculation two seperated steps were considered. Firstly, the electron ionization cross section was calculated from the ECPSSR-PWBA (Plane-Wave Born Approximation with several corrections). After the electron is ionized the hole in the inner electron shell is filled by the electron from outer shell and therefore the X-ray is emitted. These X-ray emission possibilities were calculated from the radiative transition model and the effect of Coster-Kronig transitions was corrected. The experimental result is consistent to the theoretical calculation and also to the previous works. But in comparison with the previous works the data from low energy range is measured and this is useful for understanding the mechanism of PIXE.

Any suggestion or comments please e-mail to einmann@asiaa.sinica.edu.tw.