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The collision-energy resolved rate coefficient for dissociative recombination of HD+ ions in the vibrational ground state is measured using the photocathode electron target at the heavy-ion storage ring TSR. Rydberg resonances associated…

We have investigated dissociative recombination (DR) of NH$^+$ with electrons using a merged beams configuration at the TSR heavy-ion storage ring located at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. We present…

Instrumentation and Methods for Astrophysics · Physics 2014-08-28 O. Novotný , M. Berg , D. Bing , H. Buhr , W. Geppert , M. Grieser , F. Grussie , C. Krantz , M. B. Mendes , C. Nordhorn , R. Repnow , D. Schwalm , B. Yang , A. Wolf , D. W. Savin

We have measured dissociative recombination of HCl+ with electrons using a merged beams configuration at the heavy-ion storage ring TSR located at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. We present the measured…

Instrumentation and Methods for Astrophysics · Physics 2013-10-23 O. Novotný , A. Becker , H. Buhr , C. Domesle , W. Geppert , M. Grieser , C. Krantz , H. Kreckel , R. Repnow , D. Schwalm , K. Spruck , J. Stützel , B. Yang , A. Wolf , D. W. Savin

Cross sections are presented for dissociative recombination and electron-impact vibrational excitation of the ArH+ molecular ion at electron energies appropriate for the interstellar environment. The R-matrix method is employed to determine…

Astrophysics of Galaxies · Physics 2018-08-21 A. Abdoulanziz , F. Colboc , D. A. Little , Y. Moulane , J. Zs. Mezei , E. Roueff , J. Tennyson , I. F. Schneider , V. Laporta

Rate coefficients for dissociative recombination and state-to-state rotational transitions of the D$_{2}^{+}$ ion induced by collisions with very low-energy electrons have been reported following our previous studies on HD$^{+}$ and…

Atomic Physics · Physics 2022-03-30 M. D. Epée Epée , O. Motapon , N. Pop , F. Iacob , E. Roueff , I. F. Schneider , J. Zs Mezei

A quantitative theoretical study of the dissociative recombination of SH$^+$ with electrons has been carried out. Multireference, configuration interaction calculations were used to determine accurate potential energy curves for SH$^+$ and…

Instrumentation and Methods for Astrophysics · Physics 2024-05-31 D. O. Kashinski , D. Talbi , A. P. Hickman , O. E. Di Nallo , F. Colboc , K. Chakrabarti , I. F. Schneider , J. Zs Mezei

We present the results of calculations determining the cross sections for indirect dissociative recombination of LiH$_2^+$ + $e^-$. These calculations employ multichannel quantum defect theory and Fano's rovibrational frame transformation…

Chemical Physics · Physics 2009-11-13 Daniel J. Haxton , Chris H. Greene

The latest molecular data - potential energy curves and Rydberg$/$valence interactions - characterizing the super-excited electronic states of CO are reviewed, in order to provide inputs for the study of their fragmentation dynamics.…

We used the multichannel quantum defect theory to compute cross sections and rate coefficients for the dissociative recombination of CH$^+$ initially in its lowest vibrational level $v_i^+ = 0$ with electrons of incident energy bellow $0.2$…

Instrumentation and Methods for Astrophysics · Physics 2022-03-08 J. Zs. Mezei , M. D. Epée Epée , O. Motapon , I. F. Schneider

We report measurements on the H$^{+}$ + H$^{+}$ fragmentation channel following direct single-photon double ionization of neutral NH$_{3}$ at 61.5 eV, where the two photoelectrons and two protons are measured in coincidence using 3-D…

We studied the recollision dynamics between the electrons and D$_2^+$ ions following the tunneling ionization of D$_2$ molecules in an intense short pulse laser field. The returning electron collisionally excites the D$_2^+$ ion to excited…

Atomic Physics · Physics 2009-11-10 X. M. Tong , Z. X. Zhao , C. D. Lin

This paper reports results from an experimental investigation of the dissociative recombination (DR) of the helium dimer ions at the heavy-ion Test Storage Ring (TSR) in Heidelberg, observing neutral products from electron-ion collisions in…

New high-resolution dissociative recombination rate coefficients of rotationally cool and hot H3+ in the vibrational ground state have been measured with a 22-pole trap setup and a Penning ion source, respectively, at the ion storage ring…

Cross-sections for dissociative recombination and electron-impact vibrational excitation of the BF$^+_2$ molecular ion are computed using a theoretical approach that combines the normal modes approximation for the vibrational states of the…

Plasma Physics · Physics 2024-05-03 V. Kokoouline , M. Ayouz , J. Zs. Mezei , K. Hassouni , I. F. Schneider

The HeH$^+$ cation undergoes dissociative recombination with a free electron to produce neutral He and H fragments. We present calculations using ab initio quantum defects and Fano's rovibrational frame transformation technique, along with…

Chemical Physics · Physics 2009-11-13 Daniel J. Haxton , Chris H. Greene

We have experimentally studied dissociative recombination (DR) of electronically and vibrationally relaxed ArH$^+$ in its lowest rotational levels, using an electron--ion merged-beams setup at the Cryogenic Storage Ring. We report…

We study the breakup of $\text{H}_2^+$ exposed to super-intense, femtosecond laser pulses with frequencies greater than that corresponding to the ionization potential. By solving the time-dependent Schr\"odinger equation in an extensive…

Atomic Physics · Physics 2016-04-12 Lun Yue , Lars Bojer Madsen

Dissociative recombination of N$_2$H$^+$ is explored in a two-step theoretical study. In a first step, a diatomic (1D) rough model with frozen NN bond and frozen angles is adopted, in the framework of the multichannel quantum defect theory…

Instrumentation and Methods for Astrophysics · Physics 2023-08-16 J. Zs Mezei , M. A. Ayouz , A. Orbán , A. Abdoulanziz , D. Talbi , D. O. Kashinski , E. Bron , V. Kokoouline , I. F. Schneider

Direct dissociative recombination and resonant ion-pair formation reactions of $\mathrm{HeH^+}$ are theoretically studied using time-dependant wave-packets methods. The wave packets are propagated on potential energy curves that are in…

Chemical Physics · Physics 2023-01-11 Sifiso M. Nkambule , Malibongwe Tsabedze , Oscar N. Mabuza , Mbuso K. Matfunjwa

The article presents an improved theoretical description of dissociative recombination of HCO$^+$ and DCO$^+$ ions with a low energy electron. In the previous theoretical study (Phys. Rev. A {\bf 74}, 032707) on HCO$^+$, the vibrational…

Chemical Physics · Physics 2009-11-13 Nicolas Douguet , Viatcheslav Kokoouline , Chris H. Greene
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