Energy loss straggling measurements for helium ions in Mylar and polypropylene polymeric foils

The exceptional advantages of channeling implantation into 4H-SiC to make abrupt deep profiles

“…The standard deviation of the channeling ion is well known to establish the as implanted ion species and penetration depth of channeled ion from the simplest straggling formula derived by Bohr. 28) To clarify the advantage of channeling implantation, we simulated the Al profile for box profile formation as shown in Fig. 4.…”

Energy loss straggling data of 28Si, 27Al, 24Mg, 19F, 16O, and 12C heavy ions in thin polymeric Formvar foil over a range of energies 0.1–0.6MeV/u by time-of-flight spectrometry

“…Foil thickness variation is almost assumed to be the dominant cause of discrepancy between experiment and theory in straggling measurements (Ammi et al, 2006). Besides, the experimental Ω Exp values plotted in Figs.…”

“…Finally, the Formvar C 5 H 8 O 2 (poly vinyl Formal) foil with density 1.23 g/cm 3 had a thickness x ¼0.4 μm which was determined by using the energy loss of 5.485 MeV alpha particles from a very thin 241 Am radioactive source passing through the Formvar foil (Ammi et al, 2006). The surface roughness was analyzed within AFM treatment.…”

“…Following our investigation in this field (Ammi et al, 2002), this work will provide a new set of straggling data which will be useful for comparison with different straggling formulations. A large amount of experimental straggling data is available for a great variety of incident ions and target materials of different natures (Sofield et al, 1978;Herault et al, 1988;Yang et al, 1991;Ouichaoui et al, 2000;Ammi et al, 2002Ammi et al, , 2004Ammi et al, , 2006Diwan et al, 2011;Mammeri et al, 2012). In particular, more experimental data has been added in recent years principally for light ions in thin polymeric foils (Ammi et al, 2002(Ammi et al, , 2004(Ammi et al, , 2006Mammeri et al, 2012) by combining the Rutherford backscattering spectrometry and the transmission techniques.…”

“…A large amount of experimental straggling data is available for a great variety of incident ions and target materials of different natures (Sofield et al, 1978;Herault et al, 1988;Yang et al, 1991;Ouichaoui et al, 2000;Ammi et al, 2002Ammi et al, , 2004Ammi et al, , 2006Diwan et al, 2011;Mammeri et al, 2012). In particular, more experimental data has been added in recent years principally for light ions in thin polymeric foils (Ammi et al, 2002(Ammi et al, , 2004(Ammi et al, , 2006Mammeri et al, 2012) by combining the Rutherford backscattering spectrometry and the transmission techniques. The straggling data measured this way were usually found to be in qualitative agreement with the available theoretical straggling models (Bohr, 1948;Livingston and Bethe, 1937;Titeica, 1939;Lindhard and Scharff, 1953;Chu, 1976) combining with the Bragg additivity rule (Bragg and Kleeman, Contents 1905) for compound materials.…”