Bethe-Bloch stopping-power parameters for GaAs and ZnSe

Journal Article · Sun Nov 01 04:00:00 EST 1998 · International Journal of Quantum Chemistry

DOI:https://doi.org/10.1002/(SICI)1097-461X(1998)70:4/5<919::AID-QUA37>3.3.CO;2-K· OSTI ID:321062

Porter, L E ^[1]

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1. 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

Related Subjects

66 PHYSICS
ALPHA PARTICLES
CHARGED-PARTICLE TRANSPORT
GALLIUM ARSENIDES
LITHIUM IONS
PROTONS
STOPPING POWER
ZINC SELENIDES