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As a fundamental process in atomic physics, charge exchange relies on quantum state-resolved data that is crucial for various fields such as astrophysics and plasma physics. However, there remains a g in the research on multi-electron…

Using the COLTRIMStechnique, scattering angle differential cross sections for single and double electron capture in collisions of protons and $He\sp{1,2+}$ projectiles with helium atoms for incident energies of $60-630 keV/u$ are measured.…

Using the cold target recoil ion momentum spectroscopy (COLTRIMS) technique, we have measured the simultaneous projectile and target ionization in collisions of He$^+$ projectiles with a mixture of gaseous H$_2$ and D$_2$ for an incident…

Charge exchange between highly charged ions and neutral atoms and molecules has been considered as one of the important mechanisms controlling soft X ray emissions in many astrophysical objects and environments. However, for modeling charge…

Astrophysics of Galaxies · Physics 2021-05-11 J. W. Xu , C. X. Xu , R. T. Zhang , X. L. Zhu , W. T. Feng , L. Gu , G. Y. Liang , D. L. Guo , Y. Gao , D. M. Zhao , S. F. Zhang , M. G. Su , X. Ma

Scattering angle differential cross sections for the He+ + He single electron capture process are studied using plane wave Born approximation models for projectile energies between 30 keV and 1.89 MeV. Within this simplistic framework, we…

Atomic Physics · Physics 2019-02-01 A. L. Harris , A. Plumadore

We provide the experimental evidence that the single electron capture process in slow collisions between O$^{3+}$ ions and neon dimer targets leads to an unexpected production of low-energy electrons. This production results from the…

Fully Differential Cross Sections (FDCS) for single electron capture from helium by heavy ion impact are calculated using a frozen core 3-Body model and an active electron 4-Body model within the first Born approximation. FDCS are presented…

Atomic Physics · Physics 2020-11-17 A. L. Harris

The trapping lasers of a magneto-optical trap (MOT) are used to bring Rb atoms into well defined oriented states. Coupled to recoil-ion momentum spectroscopy (RIMS), this yields a unique MOTRIMS setup which is able to probe scattering…

Atomic Physics · Physics 2013-09-30 A. Leredde , X. Fléchard , A. Cassimi , D. Hennecart , B. Pons

We investigate the $\text{O}^+:\text{C}^+:\text{O}^+$ fragmentation channel of CO$_2^{3+}$ produced in slow collisions with Ar$^{q+}$ projectiles ($4 \le q \le 16$, velocities $\approx 0.3$ a.u). Using the native-frames method, we…

Atomic Physics · Physics 2026-01-08 Akash Srivastav , Sumit Srivastav , Bhas Bapat

Experimental and theoretical state-selective X-ray spectra resulting from single-electron capture in charge exchange (CX) collisions of Ne^10+ with He, Ne, and Ar are presented for a collision velocity of 933 km s^-1 (4.54 keV nucleon^-1),…

High Energy Astrophysical Phenomena · Physics 2015-05-19 R. Ali , P. A. Neill , P. Beiersdorfer , C. L. Harris , D. R. Schultz , P. C. Stancil

Radiative double electron capture (RDEC), the one-step process occurring in ion-atom collisions, has been investigated for bare fluorine ions colliding with carbon. RDEC is completed when two target electrons are captured to a bound state…

Atomic Physics · Physics 2016-10-14 Tamer Elkafrawy , Anna Simon , John A. Tanis , Andrzej Warczak

We present calculations of the electron angular distributions in the single ionization of helium by 1-MeV proton impact at momentum transfer of 0.75 a.u. and ejected-electron energy of 6.5 eV. The results using the first and second Born…

Atomic Physics · Physics 2017-11-02 O. Chuluunbaatar , S. A. Zaytsev , K. A. Kouzakov , A. Galstyan , V. L. Shablov , Yu. V. Popov

Electron capture processes for low energy Ar9+ ions colliding on Ar2 dimer targets are investigated, focusing attention on charge sharing as a function of molecule orientation and impact parameter. A preference in charge-asymmetric…

A reaction microscope (ReMi) has been combined with a magneto-optical trap (MOT) for the kinematically complete investigation of atomic break-up processes. With the novel MOTReMi apparatus, the momentum vectors of the fragments of…

Using the ab initio computed Potential Energy Surface (PES) for the electronic interaction of the MgH$^+$ ($^1\Sigma$) ion with the He($^1$S) atom, we calculate the relevant state-changing rotationally inelastic collision cross sections…

Atomic Physics · Physics 2020-10-28 L. González-Sánchez , R. Wester , F. A. Gianturco

We implement an independent-atom and independent-electron model to investigate the collision systems of He$^{2+}$ and He$^{+}$ ion projectiles impinging on a neon dimer target. The dimer is set to be stationary at its equilibrium bond…

Atomic and Molecular Clusters · Physics 2025-05-13 Darij Starko , Tom Kirchner

Two isotopic chemical reactions, $\mathrm{Ne}^*$ + NH$_3$, and $\mathrm{Ne}^*$ + ND$_3$, have been studied at low collision energies by means of a merged beams technique. Partial cross sections have been recorded for the two reactive…

Relatively little is known about the dynamics of electron transfer reactions at low collision energy. We present a study of Penning ionization of ground state methyl fluoride molecules by electronically excited neon atoms in the 13…

Chemical Physics · Physics 2015-06-19 Justin Jankunas , Benjamin Bertsche , Andreas Osterwalder

State-selected Coulomb-crystallized molecular ions were employed for the first time in ion-molecule reaction studies using the prototypical charge-transfer process $\mathrm{N_2^++N_2\rightarrow N_2+N_2^+}$ as an example. By preparing the…

Chemical Physics · Physics 2015-06-05 Xin Tong , Tibor Nagy , Juvenal Yosa Reyes , Matthias Germann , Markus Meuwly , Stefan Willitsch
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