State-selective electron capture by multicharged ions of carbon, nitrogen, and oxygen from ground-state atomic hydrogen

Abstract

Charge-transfer cross sections into different subshells of C qϩ , N qϩ , and O qϩ (qϭ1 -5) from atomic hydrogen in the ground state have been calculated in the framework of the boundary corrected continuum intermediate-state approximation in the energy range of 40-200 keV/amu. Interactions of the active electron with the projectile ion have been approximated by a model potential containing both a long-range Coulomb potential part and a short-range part. Total cross-section results for all the ions are in reasonable agreement with available experimental results. However, oscillatory structure of charge-state dependence of total cross sections has not been found in our calculation.

Inelastic processes in the interactions of partially stripped ions of carbon, nitrogen and oxygen with atomic hydrogen at intermediate and high energies

“…In this respect, theoretical data on charge transfer and ionization for collisions of fully stripped ions with neutral atoms are quite exhaustive [6][7][8][9][10]. In contrast, not many theoretical studies [11][12][13][14][15][16] have so far been made to study the charge transfer and ionization for collisions of partially stripped ions with neutral atoms at intermediate and high energies. On the other hand, the scenario of experimental investigations on both partially and fully stripped heavy ions is well balanced.…”

Triple differential cross sections for single ionization of an atom by bare ion impact

“…φ i (r T ) is the initial bound state wavefunction of the target in their ground state. In our calculation, the targets are treated as one-electron atoms where the interaction of the active electron with the rest of the target is represented by a model potential [56]. We have used the V model Te of the form…”

“…where a j and β j are coefficients and the exponents of the Slater orbitals. The details evaluation of φ i (r T ) has been described in [56]. U i is the interaction potential in the initial channel which is given by…”

“…) is reduced to a three-dimensional [63][64][65], two-dimensional [12,66] and one-dimensional [56] integrals for 3CW, 2CW and FBA methods, respectively. The numerical integrations have been carried out using the Gauss-Laguerre and Gauss Legendre quadrature methods with proper precautions for the convergence of the integrals.…”

Electron excitation of hydrogen atom by ions impact in the energy range 20–1000 keV/amu

“…With this background in view, we are motivated to study electron excitation into n=2 to 4 and its sub-shells for the reaction i.e X q+ +H o X q+ +H* (n = 2 to n = 4) where X q+ =H + , He + , He 2+ in the framework of boundary corrected continuum intermediate state (BCCIS) approximation [32][33][34][35]. In this model, the presence of the projectile in the exit channels is described by distorting the final bound state wave function with coulomb continuum functions (associated with the projectile-electron interaction) and the relative motion between the two aggregates.…”