Charge-transfer and impact-ionization cross sections for fully and partially stripped positive ions colliding with atomic hydrogen

Details Charge-transfer and impact-ionization cross sections for fully and partially stripped positive ions colliding with atomic hydrogen Charge-transfer and impact-ionization cross sections for fully and partially stripped positive ions colliding with atomic hydrogen

Aug 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977phrva..16..531o&link_type=abstract

Physical Review A - General Physics, 3rd Series, vol. 16, Aug. 1977, p. 531-541.

Physics

General Physics

417

Charge Transfer, Hydrogen Atoms, Ion Impact, Ionic Collisions, Ionization Cross Sections, Cations, Coulomb Collisions, Inelastic Collisions, Monte Carlo Method, Trajectory Analysis

Scientific paper

Classical trajectory calculations have been used to predict the charge-transfer and impact-ionization cross sections for collisions of A(+q) + H in the velocity range of (2-7) x 10 to the 8th cm/sec. The calculations employ a three-dimensional Monte Carlo approach that uses a classical description of the H atom and the Coulomb forces among all particles to obtain the cross sections. The positive ions studied include fully stripped A(+q), with q = 1-8, 10, 14, 18, 26, and 36, and partially stripped B(+q), C(+q), N(+q), and O(+q), with q not less than 3. The total electron-loss cross sections (sum of charge exchange and impact ionization) vary only slightly with velocity for the higher charge states and reach a value of 2 x 10 to the -14th sq cm for Kr(+36) + H collisions. The importance of impact ionization relative to charge transfer is found to decrease with increasing q in the velocity range studied.

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