Inner- and outer-shell electron dynamics in proton collisions with sodium atoms

Abstract

p+Na collisions have been investigated theoretically and experimentally at impact energies in the keV regime. We present results for capture and ionization processes, and, in particular, analyse the role of initial inner-shell electrons, whose active participation is identified in the experiments through the analysis of recoil-ion momentum spectra. Quantum-mechanical calculations within the independent particle model have been carried out for all active electrons. A very good overall agreement between the theoretical and experimental results is found. The calculations support the observation that capture from inner shells is an important reaction channel even at relatively low impact energies, and dominates total capture above 40 keV.

Atomic-matter-wave diffraction evidenced in low-energy Na++Rb charge-exchange collisions

“…In the present case, MOCC has made a good job yielding state-selective cross-section ratios and DCS in close agreement with the measurements (see Tables IV-VI and Figs. [11][12][13][14][15][16][17][18]. However, the present MOTRIMS measurements have also made it possible to elicit the main shortcoming of any theoretical SAE description using frozen ionic cores (beyond the particular case of present MOCC calculations): Such methods inevitably lead to an inaccurate description of inelastic transitions occurring at small internuclear distances where the projectile and target cores overlap (see Fig.…”

“…The resulting MOTRIMS setup indeed provides stateselective differential cross sections, with hitherto unsurpassed accuracy, due to the extremely low target cloud temperature. Many experiments have been performed worldwide [7][8][9][10][11][12][13][14][15][16], using alkali-metal atomic targets, and have revealed detailed information on single-and multielectron capture processes.…”

Ionization of water molecules by proton impact: Two nonperturbative studies of the electron-emission spectra

“…More recently, Murakami et al [12,13] have studied H + + H 2 O collisions by employing a semiclassical treatment with a collision wave function expanded in a two-center basis set, augmented by a set of target pseudostates. These pseudostates are constructed by applying the basis generator method (BGM), where they are obtained by repeated application of the (regularized) electron-projectile interaction potential on the target orbitals (see [14] and references therein).…”

Role of cascade and Auger effects in the enhanced population of theC3+(1s2s2pRohrbein1, Kirchner2, Fritzsche3 2010Phys. Rev. A2111531View full textAdd to dashboardCite

“…The collision itself is addressed with the two-center basis generator method (TC-BGM) [10], which is an extension of the original (one-center) BGM introduced in Ref. [11].…”