Dissociative ion-pair formation in collisions of fast potassium atoms with benzene and fluorobenzene

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Abstract

Using a crossed molecular-beam technique, electron transfer is studied in collisions of fast potassium atoms with benzene and fluorobenzene molecules. The negative fragment ions formed in the collision region are extracted by a pulsed voltage, and their masses and energy release distributions analyzed by a time-of-flight (TOF) method. The dominant fragment from C6 H5 F is F-. The phenyl ring fragments CH- and C2 H- are also observed but with lower intensities. In the case of C6 H6 the dominant anionic specie is C2 H-. The kinetic-energy release distributions of the various fragments are derived from the width and shapes of the TOF peaks in the spectrum.
Original languageEnglish
Article number054306
JournalJournal of Chemical Physics
Volume124
Issue number5
DOIs
Publication statusPublished - 1 Jan 2006

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Fluorobenzenes
Molecular beams
Benzene
Kinetic energy
potassium
Potassium
Negative ions
benzene
fragments
Ions
Atoms
Molecules
collisions
Electrons
Electric potential
atoms
ions
molecular beams
electron transfer
kinetic energy

Keywords

  • Phenyl ring fragments
  • Pulsed voltage
  • Dissociative ion-pair formation
  • Molecular-beam technique

Cite this

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abstract = "Using a crossed molecular-beam technique, electron transfer is studied in collisions of fast potassium atoms with benzene and fluorobenzene molecules. The negative fragment ions formed in the collision region are extracted by a pulsed voltage, and their masses and energy release distributions analyzed by a time-of-flight (TOF) method. The dominant fragment from C6 H5 F is F-. The phenyl ring fragments CH- and C2 H- are also observed but with lower intensities. In the case of C6 H6 the dominant anionic specie is C2 H-. The kinetic-energy release distributions of the various fragments are derived from the width and shapes of the TOF peaks in the spectrum.",
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AU - Limão-vieira, Paulo Manuel Assis Loureiro

AU - Moutinho, Augusto

AU - Los, Joop

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AB - Using a crossed molecular-beam technique, electron transfer is studied in collisions of fast potassium atoms with benzene and fluorobenzene molecules. The negative fragment ions formed in the collision region are extracted by a pulsed voltage, and their masses and energy release distributions analyzed by a time-of-flight (TOF) method. The dominant fragment from C6 H5 F is F-. The phenyl ring fragments CH- and C2 H- are also observed but with lower intensities. In the case of C6 H6 the dominant anionic specie is C2 H-. The kinetic-energy release distributions of the various fragments are derived from the width and shapes of the TOF peaks in the spectrum.

KW - Phenyl ring fragments

KW - Pulsed voltage

KW - Dissociative ion-pair formation

KW - Molecular-beam technique

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