ELECTRONIC STOPPING POWER OF SI AND GE FOR MEV-ENERGY SI-IONS AND P-IONS

The electronic stopping powers of Si and Ge for 0-30 MeV Si-29 and P-29 ions are reported. The stopping power was studied by application of a technique of nuclear physics, the inverted analysis of Doppler-shift attenuation data. The measured values at 30 MeV are about 15% lower and at 2 MeV considerably higher than the predictions of the commonly used empirical electronic stopping powers by J. F. Ziegler, J. P. Biersack, and U. Littmark [The Stopping Power and Ranges of Ions in Matter (Pergamon, New York, 1985), Vol. 1]. The experimental nuclear stopping power was taken into account in the deduction of the electronic stopping power.