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Angle resolved photoelectron spectroscopy of O-2(a(1)Delta(g)) with synchrotron radiation

Angle resolved photoelectron spectroscopy of O-2(a(1)Delta(g)) with synchrotron radiation
Angle resolved photoelectron spectroscopy of O-2(a(1)Delta(g)) with synchrotron radiation
Angular distribution of photoelectrons for the photoionization processes O-2(+)(X (2)Pi(g), upsilon(+) = 0-3) + e(-) <-- O-2(a(1) Delta(g)) + h nu has been studied at the photon energy of 21.22 eV and in the photon energy range 13.8-15.2 eV where the cross-sections for these processes show strong enhancement due to the presence of resonant transitions to a Rydberg state (C (2)Phi(u),3s sigma(g))p (1)Phi(u). It has been found that the plot of the asymmetry parameter, beta, against photon energy shows structure at energies corresponding to O-2(p (1)Phi(u)upsilon(')) <-- O-2(a (1)Delta(g)upsilon " = 0) excitations. The O-2(+)(X (2)Pi(g),upsilon(+)) <-- O-2(a (1)Delta(g),upsilon " = 0) ionizations have also been investigated in the photon energy range 18.0-19.2 eV, where the presence of unassigned resonances was observed in earlier photoelectron spectroscopic work. In this energy range the plot of asymmetry parameter against photon energy also shows resonant structure. Suggestions for the excited states associated with these resonances have been made on the basis of constant-ionic-state spectra recorded at different angles.
angular-distribution, branching ratios, autoionization, molecule, resonances, parameters, states, o-2
0021-9606
1707-1712
Beeching, L.
d4cc3e8f-b3ca-4570-a091-a249f9b8fb68
De Fanis, A.
8ae9c12d-f352-4a44-9116-346e7a846438
Dyke, J. M.
42960400-b7de-4c53-810c-76a758fc3ac5
Gamblin, S. D.
e2dd394a-3999-4a4c-99ec-d351ac0243cf
Hooper, N.
ea5d763b-aea5-4deb-919c-e810f3dca647
Morris, A.
378f6b9c-92e7-4783-b7be-cafca74b5372
West, J. B.
fd866249-19ac-4975-b931-af67bbc9739c
Beeching, L.
d4cc3e8f-b3ca-4570-a091-a249f9b8fb68
De Fanis, A.
8ae9c12d-f352-4a44-9116-346e7a846438
Dyke, J. M.
42960400-b7de-4c53-810c-76a758fc3ac5
Gamblin, S. D.
e2dd394a-3999-4a4c-99ec-d351ac0243cf
Hooper, N.
ea5d763b-aea5-4deb-919c-e810f3dca647
Morris, A.
378f6b9c-92e7-4783-b7be-cafca74b5372
West, J. B.
fd866249-19ac-4975-b931-af67bbc9739c

Beeching, L., De Fanis, A., Dyke, J. M., Gamblin, S. D., Hooper, N., Morris, A. and West, J. B. (2000) Angle resolved photoelectron spectroscopy of O-2(a(1)Delta(g)) with synchrotron radiation. The Journal of Chemical Physics, 112 (4), 1707-1712. (doi:10.1063/1.480735).

Record type: Article

Abstract

Angular distribution of photoelectrons for the photoionization processes O-2(+)(X (2)Pi(g), upsilon(+) = 0-3) + e(-) <-- O-2(a(1) Delta(g)) + h nu has been studied at the photon energy of 21.22 eV and in the photon energy range 13.8-15.2 eV where the cross-sections for these processes show strong enhancement due to the presence of resonant transitions to a Rydberg state (C (2)Phi(u),3s sigma(g))p (1)Phi(u). It has been found that the plot of the asymmetry parameter, beta, against photon energy shows structure at energies corresponding to O-2(p (1)Phi(u)upsilon(')) <-- O-2(a (1)Delta(g)upsilon " = 0) excitations. The O-2(+)(X (2)Pi(g),upsilon(+)) <-- O-2(a (1)Delta(g),upsilon " = 0) ionizations have also been investigated in the photon energy range 18.0-19.2 eV, where the presence of unassigned resonances was observed in earlier photoelectron spectroscopic work. In this energy range the plot of asymmetry parameter against photon energy also shows resonant structure. Suggestions for the excited states associated with these resonances have been made on the basis of constant-ionic-state spectra recorded at different angles.

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More information

Published date: 22 January 2000
Keywords: angular-distribution, branching ratios, autoionization, molecule, resonances, parameters, states, o-2

Identifiers

Local EPrints ID: 19073
URI: http://eprints.soton.ac.uk/id/eprint/19073
ISSN: 0021-9606
PURE UUID: 80c28079-b7b4-4f64-b37d-2584c9122375

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Date deposited: 21 Dec 2005
Last modified: 15 Jul 2019 19:27

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