Fragmentation dynamics through geometrical distortion in low-energy electron attachment to carbon disulfide

The dissociation dynamics of dissociative electron attachment to carbon disulfide is studied using the velocity map imaging technique. Ion yields of the ${\mathrm{S}}^{\ensuremath{-}}$ and ${\mathrm{CS}}^{\ensuremath{-}}$ fragments are measured as a function of incident electron energy between 2 and 12 eV. Energy and angle-differential yields of the ${\mathrm{S}}^{\ensuremath{-}}$ fragments are analyzed to investigate the dynamics of the ${\mathrm{CS}}_{2}{}^{\ensuremath{-}}$ anion around the 3.8-eV peak. The resonances involved in this fragmentation are identified and characterized in calculations using the well-known $R$-matrix method. Based on our measurements and the geometry dependence of the calculated resonances, we propose that a geometrical distortion of the transient negative-ion state of ${\mathrm{CS}}_{2}$ is necessary for S-CS bond dissociation to occur.

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Publication Details

Journal
Physical review. A/Physical review, A
Published
2025-04-04
DOI
https://doi.org/10.1103/physreva.111.042804
Citations
2
Primary Topic
Atomic and Molecular Physics
Type
article
Field-Weighted Citation Impact
2.49

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article

Fragmentation dynamics through geometrical distortion in low-energy electron attachment to carbon disulfide

Ian Carmichael, Sylwia Ptasińska, Dipayan Chakraborty, Dhananjay Nandi et al.
2 citations
Physical review. A/Physical review, A
Atomic and Molecular Physics
2.49
article

Fragmentation dynamics through geometrical distortion in low-energy electron attachment to carbon disulfide

Ian Carmichael, Sylwia Ptasińska, Dipayan Chakraborty, Dhananjay Nandi, Jimena D. Gorfinkiel, Daniel S. Slaughter, Anirban Paul
article en
2 citations

Abstract

The dissociation dynamics of dissociative electron attachment to carbon disulfide is studied using the velocity map imaging technique. Ion yields of the ${\mathrm{S}}^{\ensuremath{-}}$ and ${\mathrm{CS}}^{\ensuremath{-}}$ fragments are measured as a function of incident electron energy between 2 and 12 eV. Energy and angle-differential yields of the ${\mathrm{S}}^{\ensuremath{-}}$ fragments are analyzed to investigate the dynamics of the ${\mathrm{CS}}_{2}{}^{\ensuremath{-}}$ anion around the 3.8-eV peak. The resonances involved in this fragmentation are identified and characterized in calculations using the well-known $R$-matrix method. Based on our measurements and the geometry dependence of the calculated resonances, we propose that a geometrical distortion of the transient negative-ion state of ${\mathrm{CS}}_{2}$ is necessary for S-CS bond dissociation to occur.

Physical review. A/Physical review, AVol. 111(4)
University of Notre Dame (US), Indian Institute of Science Education and Research Kolkata (IN), Lawrence Berkeley National Laboratory (US), The Open University (GB), Optical Sciences (United States) (US), Indian Institute of Science Education and Research, Tirupati (IN), Advanced Optical Technologies (United States) (US)
U.S. Department of Energy, Office of Science, Notre Dame Radiation Laboratory, University of Notre Dame, Basic Energy Sciences
Openalex Percentile: Top 12%
Atomic and Molecular Physics
2.49
DOIOpen Access PDFOpenAlex
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