Stopping power measurements of 1H, 4He and 14N in Si in the energy range of 0.02–1 MeV/amu

Random and channeling stopping powers of He and Li ions in Si

“…Concerning heavier ions, dos Santos et al 7 reported channeling results for B while the Heidelberg and the Bologna groups did the same for N. 8,9 More recently, in the course of the present work, Jiang et al 10 reported results of axial channeling and random stopping powers for several medium-heavy ions in Si for a restricted energy range interval.…”

“…The results are presented in Fig. 6 together with the channeling data by Lulli et al 5 and Eisen et al, 3 as well as with the random stopping values by Niemann et al 15 Each experimental point obtained in this work corresponds to an average of at least five individual measurements. The quoted errors ͑not only in Fig.…”

“…II A, we have determined the energy loss of 4 He ions along Si ͗110͘ and ͗111͘ Si directions using the random stopping values of Niemann et al 15 ͑see Table I for the respective energy ranges͒. The results are presented in Fig.…”

“…Finally, in the framework of the mean energy approximation, it can be shown 4 that the channeling specific energy loss along the projectile incoming path ͑before the backscattering͒ is a function of the energies E 0 , E c , and E r of the specific energy loss in the random direction and of geometrical factors. For the helium case, we have used the random energy loss data of Niemann et al, 15 while for the lithium case we used the experimental values obtained in this work.…”

“…well fitted ͑not shown here͒ by an expression similar to that one proposed by the Kalbitzer group. 15 The fitting formula can be found in the Appendix, and the fitted parameters are shown in Table II. In addition to our data, we show the data previously published by Santry and Werner 36 ͑open squares͒ and by Jiang et al 10 ͑open triangles͒.…”