Vacuum UV fluorescence excitation spectroscopy of CF4 and CF3Br in the range 45–140 nm

J. C. Creasey; P. A. Hatherly; I. R. Lambert; Richard Tuckett

doi:10.1016/0009-2614(92)90013-D

Vacuum UV fluorescence excitation spectroscopy of CF4 and CF3Br in the range 45–140 nm

J. C. Creasey, P. A. Hatherly, I. R. Lambert, Richard Tuckett

Chemistry

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Abstract

Fluorescence excitation spectra of CF4 and CF3Br have been measured in the range 45–95 nm and 50–140 nm respectively using synchrotron radiation. Both resonant and non-resonant peaks are observed, corresponding to neutral fragment (e.g. CF3) and parent ion (e.g. CF+4) emission. Analysis of the fluorescence has shown that bands from CF4 are due to CF*3, CF2 Ã1B1 and CF+4 C̃ 2T2. Bands from CF3Br are due to CF*3, CF2 Ã 1B1 and possibly CF3Br+ Ẽ 2A1. The radiative lifetimes of all the fluorescing bands have been measured. Some of the CF3Br bands show bi-exponential behaviour. These results are interpreted by comparison with previous photoabsorption and electron energy loss spectra.

Original language	English
Pages (from-to)	223-231
Journal	Chemical Physics Letters
Volume	188
Issue number	3-4
DOIs	https://doi.org/10.1016/0009-2614(92)90013-D
Publication status	Published - 10 Jan 1992

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title = "Vacuum UV fluorescence excitation spectroscopy of CF4 and CF3Br in the range 45–140 nm",

abstract = "Fluorescence excitation spectra of CF4 and CF3Br have been measured in the range 45–95 nm and 50–140 nm respectively using synchrotron radiation. Both resonant and non-resonant peaks are observed, corresponding to neutral fragment (e.g. CF3) and parent ion (e.g. CF+4) emission. Analysis of the fluorescence has shown that bands from CF4 are due to CF*3, CF2 {\~A}1B1 and CF+4 {\~C} 2T2. Bands from CF3Br are due to CF*3, CF2 {\~A} 1B1 and possibly CF3Br+ Ẽ 2A1. The radiative lifetimes of all the fluorescing bands have been measured. Some of the CF3Br bands show bi-exponential behaviour. These results are interpreted by comparison with previous photoabsorption and electron energy loss spectra.",

author = "Creasey, {J. C.} and Hatherly, {P. A.} and Lambert, {I. R.} and Richard Tuckett",

year = "1992",

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doi = "10.1016/0009-2614(92)90013-D",

language = "English",

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TY - JOUR

T1 - Vacuum UV fluorescence excitation spectroscopy of CF4 and CF3Br in the range 45–140 nm

AU - Creasey, J. C.

AU - Hatherly, P. A.

AU - Lambert, I. R.

AU - Tuckett, Richard

PY - 1992/1/10

Y1 - 1992/1/10

N2 - Fluorescence excitation spectra of CF4 and CF3Br have been measured in the range 45–95 nm and 50–140 nm respectively using synchrotron radiation. Both resonant and non-resonant peaks are observed, corresponding to neutral fragment (e.g. CF3) and parent ion (e.g. CF+4) emission. Analysis of the fluorescence has shown that bands from CF4 are due to CF*3, CF2 Ã1B1 and CF+4 C̃ 2T2. Bands from CF3Br are due to CF*3, CF2 Ã 1B1 and possibly CF3Br+ Ẽ 2A1. The radiative lifetimes of all the fluorescing bands have been measured. Some of the CF3Br bands show bi-exponential behaviour. These results are interpreted by comparison with previous photoabsorption and electron energy loss spectra.

AB - Fluorescence excitation spectra of CF4 and CF3Br have been measured in the range 45–95 nm and 50–140 nm respectively using synchrotron radiation. Both resonant and non-resonant peaks are observed, corresponding to neutral fragment (e.g. CF3) and parent ion (e.g. CF+4) emission. Analysis of the fluorescence has shown that bands from CF4 are due to CF*3, CF2 Ã1B1 and CF+4 C̃ 2T2. Bands from CF3Br are due to CF*3, CF2 Ã 1B1 and possibly CF3Br+ Ẽ 2A1. The radiative lifetimes of all the fluorescing bands have been measured. Some of the CF3Br bands show bi-exponential behaviour. These results are interpreted by comparison with previous photoabsorption and electron energy loss spectra.

U2 - 10.1016/0009-2614(92)90013-D

DO - 10.1016/0009-2614(92)90013-D

M3 - Article

SN - 0009-2614

VL - 188

SP - 223

EP - 231

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 3-4

ER -

Vacuum UV fluorescence excitation spectroscopy of CF4 and CF3Br in the range 45–140 nm

Abstract

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