Abstract
We report the predictions of the kinetic theory for proton stopping in molecular targets within the orbital local plasma approximation (OLPA) introduced by Meltzer, Sabin and Trickey [Phys. Rev. A 41 (1990) 220]. In order to present a self-contained treatment, all the quantities entering in the calculations are obtained through use of the floating spherical Gaussian orbital (FSGO) representation of localized molecular orbitals. The calculations are performed for representative molecular targets, generating S e values for cores, single, double, triple-bonds and lone pairs as a function of projectile velocity. Fair agreement is observed with available experimental data and with other theoretical estimates. The adequacy of the FSGO representation in the study of molecular stopping for protons within the spirit of the kinetic theory and the orbital implementation of the local plasma approximation is confirmed in this work.
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