论文信息 - Angular scattering in slow multiple-charged ion, atom collisions

Angular scattering in slow multiple-charged ion, atom collisions

The C6++H system is used to illustrate the importance of large-angle scattering in collisions between slow multiply-charged ions and atoms. A quantum mechanical description based on a diabatic formalism of the collision system is used to obtain differential cross sections for electron capture in the relative velocity range nu =1*107 to 3*107 cm s-1 (Ecm approximately=48 to 430 eV). The threshold for angular scattering is at E theta approximately=0.2 keV deg which correlates with the curve crossing between initial and final molecular states located at Rx approximately=8a0. The centre-of-mass acceptance angles required to observe fixed fractions of the total electron capture cross sections are presented. Representative examples for the detection of 90% of the total electron capture cross section requires angular acceptances of 78 degrees at 1*107 cm s-1 and 8.5 degrees at 3*107 cm s-1.

R. Olson | M. Kimura

[1] T. J. Gray,et al. Charge transfer and ionization in low-energy Ar/sup q/++Ne collisions , 1981 .

[2] M. Kimura,et al. Analytically derived switching functions for exactH2+eigenstates , 1981 .

[3] R. Phaneuf. Electron capture in very slow C/sup q/++H collisions , 1981 .

[4] T. A. Green,et al. Modified method of perturbed stationary states. III. Charge-exchange cross-sections for C6+-H collisions , 1981 .

[5] K. Schartner,et al. K X-ray transitions from highly charged very slow Ne recoil ions produced by 1.4 MeV/amu very heavy ion impact , 1980 .

[6] D. Mathur,et al. Energy-loss spectra of product ions in electron capture , 1979 .

[7] A. Salop,et al. Electron transfer between multicharged ions and neutral species , 1976 .

[8] K. Birkinshaw,et al. Curve-crossing spectroscopy of systems involving Coulomb repulsion of products , 1976 .

[9] W. Goddard,et al. Charge-transfer process using the molecular-wave-function approach: The asymmetric charge transfer and excitation in Li + Na+ and Na + Li+ , 1974 .

[10] B. R. Johnson,et al. The multichannel log-derivative method for scattering calculations , 1973 .

[11] F. Smith,et al. COLLISION SPECTROSCOPY. IV. SEMICLASSICAL THEORY OF INELASTIC SCATTERING WITH APPLICATIONS TO He$sup +$ + Ne. , 1971 .

[12] F. Smith,et al. DIABATIC AND ADIABATIC REPRESENTATIONS FOR ATOMIC COLLISION PROBLEMS. , 1969 .

[13] T. A. Green,et al. Variable Phase Approach to Potential Scattering , 1968 .