Kinetic energy release of F- desorption from condensed CF4 following low energy electron impact

Y. Le Coat; Mohamed Nejib Hedhili; R. Azria; M. Tronc; F. Weik; E. Illenberger

Kinetic energy release of F^- desorption from condensed CF₄ following low energy electron impact

Y. Le Coat^*, Mohamed Nejib Hedhili, R. Azria, M. Tronc, F. Weik, E. Illenberger

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The kinetic energy release of desorbed F^- ions formed via dissociative electron attachment (DA) to condensed CF₄ is measured by means of an electrostatic energy analyzer. The condensed phase results are compared to DA from gas phase CF₄ where F^- appears with high kinetic energy from a feature at 6.2 eV (assigned as CF₄^- (²T₂) shape resonance) and with low kinetic energy from a second feature located at 7.7 eV (assigned as a Feshbach type CF₄^*- resonance with T₁ symmetry). In contrast, the kinetic energy of desorbed F^- continuously increases with electron energy over the entire range of the resonance feature (5-9 eV) with a slope of 0.25 for the most probable energy of F^-. The present results indicate that the transfer of electronic energy into nuclear motion is considerably modified in the condensed phase.

Original language	English (US)
Pages (from-to)	231-239
Number of pages	9
Journal	International Journal of Mass Spectrometry and Ion Processes
Volume	164
Issue number	3
State	Published - Dec 1 1997

Keywords

CF
Gas phase/condensed phase
Kinetic energy release
Negative ion resonances

ASJC Scopus subject areas

Spectroscopy

Cite this

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title = "Kinetic energy release of F- desorption from condensed CF4 following low energy electron impact",

abstract = "The kinetic energy release of desorbed F- ions formed via dissociative electron attachment (DA) to condensed CF4 is measured by means of an electrostatic energy analyzer. The condensed phase results are compared to DA from gas phase CF4 where F- appears with high kinetic energy from a feature at 6.2 eV (assigned as CF4- (2T2) shape resonance) and with low kinetic energy from a second feature located at 7.7 eV (assigned as a Feshbach type CF4*- resonance with T1 symmetry). In contrast, the kinetic energy of desorbed F- continuously increases with electron energy over the entire range of the resonance feature (5-9 eV) with a slope of 0.25 for the most probable energy of F-. The present results indicate that the transfer of electronic energy into nuclear motion is considerably modified in the condensed phase.",

keywords = "CF, Gas phase/condensed phase, Kinetic energy release, Negative ion resonances",

author = "{Le Coat}, Y. and Hedhili, {Mohamed Nejib} and R. Azria and M. Tronc and F. Weik and E. Illenberger",

year = "1997",

month = dec,

day = "1",

language = "English (US)",

volume = "164",

pages = "231--239",

journal = "International Journal of Mass Spectrometry and Ion Processes",

issn = "0168-1176",

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TY - JOUR

T1 - Kinetic energy release of F- desorption from condensed CF4 following low energy electron impact

AU - Le Coat, Y.

AU - Hedhili, Mohamed Nejib

AU - Azria, R.

AU - Tronc, M.

AU - Weik, F.

AU - Illenberger, E.

PY - 1997/12/1

Y1 - 1997/12/1

N2 - The kinetic energy release of desorbed F- ions formed via dissociative electron attachment (DA) to condensed CF4 is measured by means of an electrostatic energy analyzer. The condensed phase results are compared to DA from gas phase CF4 where F- appears with high kinetic energy from a feature at 6.2 eV (assigned as CF4- (2T2) shape resonance) and with low kinetic energy from a second feature located at 7.7 eV (assigned as a Feshbach type CF4*- resonance with T1 symmetry). In contrast, the kinetic energy of desorbed F- continuously increases with electron energy over the entire range of the resonance feature (5-9 eV) with a slope of 0.25 for the most probable energy of F-. The present results indicate that the transfer of electronic energy into nuclear motion is considerably modified in the condensed phase.

AB - The kinetic energy release of desorbed F- ions formed via dissociative electron attachment (DA) to condensed CF4 is measured by means of an electrostatic energy analyzer. The condensed phase results are compared to DA from gas phase CF4 where F- appears with high kinetic energy from a feature at 6.2 eV (assigned as CF4- (2T2) shape resonance) and with low kinetic energy from a second feature located at 7.7 eV (assigned as a Feshbach type CF4*- resonance with T1 symmetry). In contrast, the kinetic energy of desorbed F- continuously increases with electron energy over the entire range of the resonance feature (5-9 eV) with a slope of 0.25 for the most probable energy of F-. The present results indicate that the transfer of electronic energy into nuclear motion is considerably modified in the condensed phase.

KW - CF

KW - Gas phase/condensed phase

KW - Kinetic energy release

KW - Negative ion resonances

UR - http://www.scopus.com/inward/record.url?scp=0040079642&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0040079642

SN - 0168-1176

VL - 164

SP - 231

EP - 239

JO - International Journal of Mass Spectrometry and Ion Processes

JF - International Journal of Mass Spectrometry and Ion Processes

IS - 3

ER -

Kinetic energy release of F^- desorption from condensed CF₄ following low energy electron impact

Abstract

Keywords

ASJC Scopus subject areas

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