Stopping Power of different ions in Zn

C. C MONTANARI; E. D. CANTERO; R. C. FADANELLI; M. BEHAR; J. C ECKARDT; G.H. LANTSCHNER; J. E. MIRAGLIA; N. R. ARISTA

Phalaborwa, Sudáfrica

Congreso; 23 International Conference on Atomic Collisions in Solids (ICACS; 2008

Local organizers of the ICACS23

Despite the technological uses of zinc and the applications of the stopping power data to material science, measurements of stopping power of Zn for different ions are scarce in comparison with other solids. This scarcity of data is mainly due to difficulties in the preparation of thin zinc samples. We present here an experimental-theoretical study on the stopping power of different ions in Zn, on a wide rage of energies. This study is based on previous results of H, He and Li ions, together with new data of stopping power of Be and B ions. These new measurements of stopping power Be and B ions in Zn were performed by using the Rutherford backscattering technique and the 3MV Tandetron accelerator of the Universidad Federal de Rio Grande do Sul, in Porto Alegre, Brazil. The thin films were produced in the Centro Atómico Bariloche, Argentina. The experimental results cover the energy interval (50 to 1100) keV/amu, which includes the stopping maximum in both cases. The results seem to continue the tendency of the only available data by Mertens and Krist (J. Appl. Phys. 53, 7343, 1982) for lower energies. On the other hand, we performed ab initio theoretical calculations for the different ions with Z=1 up to 5. These calculations are based on the Extended Friedel Sum Rule -Transport Cross Section formulation for the Zn valence electrons, and on the Levine-Louie Shellwise Local Plasma Approximation for the inner-shells. Theoretical and experimental results are discussed and compared with previous experimental data and the SRIM 2006 values.