Bethe-Bloch stopping-power parameters for GaAs and ZnSe
- Washington State Univ., Pullman, WA (United States)
If one is to calculate the stopping power for a specified projectile-target combination within the energy interval of applicability of modified Bethe-Bloch theory, values of several parameters appearing in the formulation must be ascertained. In the past, the author has established such values for numerous target materials through fits of stopping-power measurements with modified Bethe-Bloch theory. However, the semiconductor materials ZnSe and GaAs have not yet been thus characterized. A set of very recent measurements of the stopping powers of each compound for low-energy protons and alpha particles, reported by members of the Helsinki group, has been analyzed in order to remedy this dearth of parameter values. Moreover, some corresponding measurements for {sup 7}Li ions traversing ZnSe have been analyzed for the purpose of obtaining the value of a single effective charge parameter. Results of these studies are reasonably consistent with expectations, and values are recommended for the mean excitation energy and the Barkas-effect parameter for each compound.
- OSTI ID:
- 321062
- Report Number(s):
- CONF-980276--
- Journal Information:
- International Journal of Quantum Chemistry, Journal Name: International Journal of Quantum Chemistry Journal Issue: 4-5 Vol. 70; ISSN IJQCB2; ISSN 0020-7608
- Country of Publication:
- United States
- Language:
- English
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