Relative partial photoionization cross-sections and photoelectron branching ratios of ethylene

John G. Brennan; Glyn Cooper; Jennifer C. Green; Martin P. Payne; Catherine M. Redfern

doi:10.1016/0368-2048(87)80008-7

Relative partial photoionization cross-sections and photoelectron branching ratios of ethylene

John G. Brennan, Glyn Cooper, Jennifer C. Green, Martin P. Payne, Catherine M. Redfern

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

17 Scopus citations

Abstract

Relative partial photoionization cross-sections and photoelectron branching ratios of the valence bands (~10-25 eV binding energy) of ethylene are reported over the photon energy ranges 18-100 eV and 21-100 eV, respectively. The four lowest ionization energy bands (1b^-1_1u, 1b^-1_1g, 3a^-1_g, and 1b^-1_2u) show monotonic cross-section decreases with photon energy from 33 eV, the 1b^-1_1u CC π band showing the least rapid decline. In contrast, the 2b^-1_3u and 2a^-1_g bands show almost constant cross-sections up to ~50 eV photon energy, followed by similar, although slower, monotonic decreases. This is attributed to the substantial carbon 2s character of the 2b_3u and 2a_g orbitais. The cross-section behaviour of all bands is interpreted with the aid of SCF-LCAO-MO calculations on the neutral molecule using the Gaussian-80 series of programs.

Original language	English (US)
Pages (from-to)	297-305
Number of pages	9
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	43
Issue number	3
DOIs	https://doi.org/10.1016/0368-2048(87)80008-7
State	Published - 1987
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Radiation
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Spectroscopy
Physical and Theoretical Chemistry

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10.1016/0368-2048(87)80008-7

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@article{008c18c11f1048faad4910045b1a856d,

title = "Relative partial photoionization cross-sections and photoelectron branching ratios of ethylene",

abstract = "Relative partial photoionization cross-sections and photoelectron branching ratios of the valence bands (~10-25 eV binding energy) of ethylene are reported over the photon energy ranges 18-100 eV and 21-100 eV, respectively. The four lowest ionization energy bands (1b-11u, 1b-11g, 3a-1g, and 1b-12u) show monotonic cross-section decreases with photon energy from 33 eV, the 1b-11u CC π band showing the least rapid decline. In contrast, the 2b-13u and 2a-1g bands show almost constant cross-sections up to ~50 eV photon energy, followed by similar, although slower, monotonic decreases. This is attributed to the substantial carbon 2s character of the 2b3u and 2ag orbitais. The cross-section behaviour of all bands is interpreted with the aid of SCF-LCAO-MO calculations on the neutral molecule using the Gaussian-80 series of programs.",

author = "Brennan, {John G.} and Glyn Cooper and Green, {Jennifer C.} and Payne, {Martin P.} and Redfern, {Catherine M.}",

note = "Funding Information: We thank the SERC for financial oratory for experimental assistance, toral fellowship.",

year = "1987",

doi = "10.1016/0368-2048(87)80008-7",

language = "English (US)",

volume = "43",

pages = "297--305",

journal = "Journal of Electron Spectroscopy and Related Phenomena",

issn = "0368-2048",

publisher = "Elsevier",

number = "3",

}

TY - JOUR

T1 - Relative partial photoionization cross-sections and photoelectron branching ratios of ethylene

AU - Brennan, John G.

AU - Cooper, Glyn

AU - Green, Jennifer C.

AU - Payne, Martin P.

AU - Redfern, Catherine M.

N1 - Funding Information: We thank the SERC for financial oratory for experimental assistance, toral fellowship.

PY - 1987

Y1 - 1987

N2 - Relative partial photoionization cross-sections and photoelectron branching ratios of the valence bands (~10-25 eV binding energy) of ethylene are reported over the photon energy ranges 18-100 eV and 21-100 eV, respectively. The four lowest ionization energy bands (1b-11u, 1b-11g, 3a-1g, and 1b-12u) show monotonic cross-section decreases with photon energy from 33 eV, the 1b-11u CC π band showing the least rapid decline. In contrast, the 2b-13u and 2a-1g bands show almost constant cross-sections up to ~50 eV photon energy, followed by similar, although slower, monotonic decreases. This is attributed to the substantial carbon 2s character of the 2b3u and 2ag orbitais. The cross-section behaviour of all bands is interpreted with the aid of SCF-LCAO-MO calculations on the neutral molecule using the Gaussian-80 series of programs.

AB - Relative partial photoionization cross-sections and photoelectron branching ratios of the valence bands (~10-25 eV binding energy) of ethylene are reported over the photon energy ranges 18-100 eV and 21-100 eV, respectively. The four lowest ionization energy bands (1b-11u, 1b-11g, 3a-1g, and 1b-12u) show monotonic cross-section decreases with photon energy from 33 eV, the 1b-11u CC π band showing the least rapid decline. In contrast, the 2b-13u and 2a-1g bands show almost constant cross-sections up to ~50 eV photon energy, followed by similar, although slower, monotonic decreases. This is attributed to the substantial carbon 2s character of the 2b3u and 2ag orbitais. The cross-section behaviour of all bands is interpreted with the aid of SCF-LCAO-MO calculations on the neutral molecule using the Gaussian-80 series of programs.

UR - http://www.scopus.com/inward/record.url?scp=0040522378&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0040522378&partnerID=8YFLogxK

U2 - 10.1016/0368-2048(87)80008-7

DO - 10.1016/0368-2048(87)80008-7

M3 - Article

AN - SCOPUS:0040522378

SN - 0368-2048

VL - 43

SP - 297

EP - 305

JO - Journal of Electron Spectroscopy and Related Phenomena

JF - Journal of Electron Spectroscopy and Related Phenomena

IS - 3

ER -

Relative partial photoionization cross-sections and photoelectron branching ratios of ethylene

Abstract

All Science Journal Classification (ASJC) codes

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