Dissociative electron attachment to the highly reactive difluoromethylene molecule–importance of CF2 for negative ion formation in fluorocarbon plasmas

K. Graupner; T. A. Field; C.A. Mayhew

doi:10.1088/1367-2630/12/8/083035

Dissociative electron attachment to the highly reactive difluoromethylene molecule–importance of CF2 for negative ion formation in fluorocarbon plasmas

K. Graupner, T. A. Field, C.A. Mayhew

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16 Citations (Scopus)

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Abstract

Dissociative electron attachment to the highly reactive difluoromethylene molecule, CF2, produced in a C3F6/He microwave plasma and stepwise via the fast atom reaction CF3I+H?CF3+HI and CF3+H?CF2+HF, has been investigated. The upper limit for the cross section of formation of F- via dissociative electron attachment to CF2 is estimated to be 5×10-4?Å2. This value is four orders of magnitude smaller than the cross section previously predicted from scattering calculations. It is concluded that difluoromethylene plays a negligible role in negative ion formation in fluorocarbon plasmas.

Original language	English
Article number	083035
Number of pages	16
Journal	New Journal of Physics
Volume	12
DOIs	https://doi.org/10.1088/1367-2630/12/8/083035
Publication status	Published - 17 Aug 2010

Bibliographical note

The authors are very grateful to the EPSRC for financial support of this work through grant EP/F031025/1. CAM is grateful for a travel grant from the 'UK network in non-thermal plasma science' funded through the EPSRC (EP/C010787/1).

ASJC Scopus subject areas

General Physics and Astronomy

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10.1088/1367-2630/12/8/083035

Dissociative electron attachment to the highly reactive difluoromethylene molecule–importance of CF2 for negative ion formation in fluorocarbon plasmas
© 2013 IOP Publishing This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
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R1880AMP: Negative Ions in Space <MATHS/CHEMIS>
Field, T. (PI)
01/08/2007 → …
Project: Research

Cite this

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title = "Dissociative electron attachment to the highly reactive difluoromethylene molecule–importance of CF2 for negative ion formation in fluorocarbon plasmas",

abstract = "Dissociative electron attachment to the highly reactive difluoromethylene molecule, CF2, produced in a C3F6/He microwave plasma and stepwise via the fast atom reaction CF3I+H?CF3+HI and CF3+H?CF2+HF, has been investigated. The upper limit for the cross section of formation of F- via dissociative electron attachment to CF2 is estimated to be 5×10-4?{\AA}2. This value is four orders of magnitude smaller than the cross section previously predicted from scattering calculations. It is concluded that difluoromethylene plays a negligible role in negative ion formation in fluorocarbon plasmas.",

author = "K. Graupner and Field, {T. A.} and C.A. Mayhew",

note = "The authors are very grateful to the EPSRC for financial support of this work through grant EP/F031025/1. CAM is grateful for a travel grant from the 'UK network in non-thermal plasma science' funded through the EPSRC (EP/C010787/1).",

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AU - Graupner, K.

AU - Field, T. A.

AU - Mayhew, C.A.

N1 - The authors are very grateful to the EPSRC for financial support of this work through grant EP/F031025/1. CAM is grateful for a travel grant from the 'UK network in non-thermal plasma science' funded through the EPSRC (EP/C010787/1).

PY - 2010/8/17

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N2 - Dissociative electron attachment to the highly reactive difluoromethylene molecule, CF2, produced in a C3F6/He microwave plasma and stepwise via the fast atom reaction CF3I+H?CF3+HI and CF3+H?CF2+HF, has been investigated. The upper limit for the cross section of formation of F- via dissociative electron attachment to CF2 is estimated to be 5×10-4?Å2. This value is four orders of magnitude smaller than the cross section previously predicted from scattering calculations. It is concluded that difluoromethylene plays a negligible role in negative ion formation in fluorocarbon plasmas.

AB - Dissociative electron attachment to the highly reactive difluoromethylene molecule, CF2, produced in a C3F6/He microwave plasma and stepwise via the fast atom reaction CF3I+H?CF3+HI and CF3+H?CF2+HF, has been investigated. The upper limit for the cross section of formation of F- via dissociative electron attachment to CF2 is estimated to be 5×10-4?Å2. This value is four orders of magnitude smaller than the cross section previously predicted from scattering calculations. It is concluded that difluoromethylene plays a negligible role in negative ion formation in fluorocarbon plasmas.

U2 - 10.1088/1367-2630/12/8/083035

DO - 10.1088/1367-2630/12/8/083035

M3 - Article

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JO - New Journal of Physics

JF - New Journal of Physics

M1 - 083035

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Dissociative electron attachment to the highly reactive difluoromethylene molecule–importance of CF2 for negative ion formation in fluorocarbon plasmas

Abstract

Bibliographical note

ASJC Scopus subject areas

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R1880AMP: Negative Ions in Space <MATHS/CHEMIS>

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