State-selective electron transfer and ionization in collisions of highly charged ions with ground-state Na(3s) and laser-excited Na*(3p)

Abstract

Single electron transfer and ionization in collisions of N 5+ and Ne 8+ with ground state Na(3s) and laser excited Na * (3p) are investigated both experimentally and theoretically at collision energies from 1 to 10 keV/amu, which includes the classical orbital velocity of the valence electron. State-selective partial cross sections are obtained using recoil-ion momentum spectroscopy in combination with a magneto-optically cooled Na atom target. A strong dependence of the cross sections on the collision energy is observed. In general, both the relative magnitude and the energy dependence are found to be in good agreement with classical-trajectory Monte Carlo calculations.

Role of electron saddle swaps in the photon spectra following Li3+charge-exchange collisions with H*(n= 2), Na(3Otranto1, Hoekstra2, Olson3 2014Phys. Rev. ASelf Cite

“…Since H * (n = 2) is not a feasible target for laboratory experiments, in recent years magneto-optical-trap-recoil-ion momentum-spectroscopy experiments have been conducted at KVI-Groningen using different alkali-metal targets, Li(2s), Na(3s), and Na * (3p), since their ionization potentials are * Corresponding author: sotranto@uns.edu.ar similar to H * (n = 2) [5][6][7]. It is expected that charge-exchange information on H * (n = 2), which has V ion = 3.4 eV, can be interpolated from the results obtained for Na(3s) (V ion = 5.14 eV) and Na * (3p) (V ion = 3.04 eV).…”

Calculation of ionization and total and partial charge exchange cross sections for collisions of C6+ and N7+ with H

“…The CTMC method has also been applied to study collisions with excited atoms (e.g. [16,33,21,35,36]). …”

Oscillatory patterns in angular differential ion-atom charge exchange cross sections: The role of electron saddle swaps

“…Since the MOTRIMS device developed at KVI has been described elsewhere [10,14] only a brief outline will be given here. Sodium atoms are cooled and trapped in a magneto-optical trap (MOT) using a magnetic field of 20 Gauss/cm and three counterpropagating laser beams with a diameter of 20 mm each.…”

“…By using this technique, during the last few years the KVI group succeeded in obtaining nstate selective charge exchange cross sections for ion collisions with Na(3s) and Na*(3p) [10]. These cross sections have been checked against classical trajectory Monte Carlo (CTMC) calculations and are shown to be in good agreement for the collision systems and impact energy ranges explored [11][12][13][14]. In this sense, we now have at hand all the tools needed (experimental and theoretical) for a closer inspection of the well documented oscillatory structures in charge exchange processes involving ion collisions with alkali.…”