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Ion-pair dissociation (IPD) to gas phase carbon dioxide molecule has been studied using time of flight (TOF) based mass spectroscopy in combination with the highly differential velocity slice imaging (VSI) technique. The appearance energy…

Atomic Physics · Physics 2020-09-01 Narayan Kundu , Sumit Naskar , Irina Jana , Anirban Paul , Dhananjay Nandi

The dipolar dissociation of molecular oxygen due to 21-35 eV energy electron collision has been studied using the time sliced velocity map imaging technique. A rough estimation about the threshold of the process and the kinetic energy and…

Atomic and Molecular Clusters · Physics 2016-08-31 Pamir Nag , Dhananjay Nandi

Complete dissociation dynamics of low-energy electron attachment to carbon disulfide have been studied using the velocity slice imaging (VSI) technique. The ion yields of S- and CS- fragment ions as the function of incident electron energy…

Atomic and Molecular Clusters · Physics 2022-09-28 Anirban Paul , Dhananjay Nandi

Magnetic fields play a role in the dynamics of many astrophysical processes, but they are hard to detect. In a partially ionized plasma, a magnetic field works directly on the ionized medium but not on the neutral medium, which gives rise…

Solar and Stellar Astrophysics · Physics 2020-06-24 Boy Lankhaar , Wouter Vlemmings

The onset of collision dynamics between an ion and a Rydberg atom is studied in a regime characterized by a multitude of collision channels. These channels arise from coupling between a non-polar Rydberg state and numerous highly polar…

In this study, we examine the interactions of low- to intermediate-energy electrons (0$-$45 eV) with carbonyl sulfide (OCS). These collisions lead to the formation of several anionic fragments, including C$^-$, O$^-$, S$^-$, and SO$^-$.…

Atomic and Molecular Clusters · Physics 2025-12-18 Soumya Ghosh , Narayan Kundu , Aryya Ghosh , Dhananjay Nandi

Ionization collisions have important consequences in many physical phenomena, and the mechanism that leads to ionization is not universal. Double differential cross sections (DDCSs) are often used to identify ionization mechanisms because…

Atomic Physics · Physics 2022-02-23 A. Plumadore , A. L. Harris

Differential cross sections are computed for the title polar molecule using static interaction, exchange forces and correlation-polarisation effects as described in detail in the main text. The dipole effect is also reported via the dipole…

Chemical Physics · Physics 2009-11-13 F. A. Gianturco , T. Stoecklin

Laser pulses with stable electric field waveforms establish the opportunity to achieve coherent control on attosecond timescales. We present experimental and theoretical results on the steering of electronic motion in a multi-electron…

The fragmentation of carbon monoxide dimers induced by collisions with low energy Ar$^{9+}$ ions is investigated using the COLTRIMS technique. The presence of a neighbor molecule in the dimer serves here as a diagnostic tool to probe the…

Atomic and Molecular Clusters · Physics 2021-11-03 A. Méry , X. Fléchard , S. Guillous , V. Kumar , M. Lalande , J. Rangama , W. Wolff , A. Cassimi

Kinetic energy and angular distributions of O$^-$ ions formed by dissociative electron attachment to CO molecule have been studied for 9, 9.5, 10, 10.5, 11, 11.5 eV incident electron energies around the resonance using time sliced velocity…

Atomic and Molecular Clusters · Physics 2015-02-10 Pamir Nag , Dhananjay Nandi

Recently Rydberg atom-ion bound states have been observed using a high resolution ion microscope (Nature 605, 453 (2022)) and the corresponding vibrational dynamics has been spectroscopically analyzed. The atom-ion bond is created by an…

Atomic Physics · Physics 2024-03-08 Carlos Barbero-Petrel , Peter Schmelcher , Rosario González-Férez

An ab initio simulation of strong-field photodissociation of diatomic molecules was developed, inspired by recent dissociation experiments of F2-. The transition between electronic states was modeled, including the laser pulse and…

Atomic Physics · Physics 2020-06-26 Bar Ezra , Shimshon Kallush , Ronnie Kosloff

We study the interaction of a heteronuclear diatomic molecule, carbon monoxide, with a free-electron laser (FEL) pulse. We compute the ion yields and the intermediate states by which the ion yields are populated. We do so using rate…

Atomic Physics · Physics 2020-12-02 Henry I B Banks , Antonis Hadjipittas , Agapi Emmanouilidou

The nuclear photo-emulsion technique is used to study the information carried by the medium energy nucleons produced in heavy ion collisions. Multiplicity, energies as well as the angular distribution of this type of particles are measured.…

High Energy Physics - Phenomenology · Physics 2007-05-23 M. T. Hussein , N. M. Hassan , N. M. Sadek , Jamila Elsweedy

We demonstrate simultaneous measurements of the charge state, energy and angular distribution of keV ions in transmission experiments through self-supporting foils. Using a time-of-flight approach we have introduced an electrostatic…

Instrumentation and Detectors · Physics 2020-11-19 R. Holeňák , S. Lohmann , F. Sekula , D. Primetzhofer

Anion and cation emission following water dissociation was studied for 6.6-keV $^{16}$O$^{+}$ + H$_{2}$O collisions. Absolute cross sections for the emission of all positively and negatively charged fragments, differential in both energy…

Inelastic collision dynamics between isolated gas-phase carbon monoxide molecules and low energetic electrons (< 50 eV) has been studied using state-of-the-art velocity map imaging apparatus and reported previously. These were based on data…

Atomic Physics · Physics 2021-11-16 Narayan Kundu , Dipayan Biswas , Vikrant Kumar , Anirban Paul , Dhananjay Nandi

We present a new technique to calculate the cross-section for diffractive vector meson production and DVCS in electron-ion collisions based on the dipole model. The measurement of these processes can provide valuable information on…

High Energy Physics - Phenomenology · Physics 2013-02-28 Tobias Toll , Thomas Ullrich

A Negative Ion Time Projection Chamber was used to measure the field dependence of lateral and longitudinal diffusion for CS$_2$ anions drifting in mixtures of CS$_2$ and Ar at 40 Torr. Ion drift velocities and limits on the capture…

Instrumentation and Detectors · Physics 2009-11-06 Tohru Ohnuki , Daniel P. Snowden-Ifft , C. J. Martoff
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