The University of Southampton
University of Southampton Institutional Repository

Photoionization of iodine atoms: Rydberg series which converge to the I+(1S0)?I(2P3/2) threshold

Photoionization of iodine atoms: Rydberg series which converge to the I+(1S0)?I(2P3/2) threshold
Photoionization of iodine atoms: Rydberg series which converge to the I+(1S0)?I(2P3/2) threshold
Relative partial photoionization cross sections and angular distribution parameters ? have been measured for the first and fourth (5p)?1 photoelectron (PE) bands of atomic iodine by performing angle-resolved constant-ionic-state (CIS) measurements on these PE bands between the 1D2 and 1S0 (5p)?1 ionic thresholds in the photon energy region of 12.9–14.1 eV. Rydberg series arising from the 5p?ns and 5p?nd excitations are observed in both the first PE band, I+(3P2)?I(2P3/2), and the fourth PE band, I+(1D2)?I(2P3/2), CIS spectra. For each Rydberg state, the resonance energy, quantum defect, linewidth, line shape, and photoelectron angular distribution parameter ? have been determined. For the ?-plots for each PE band, only resonances corresponding to 5p?nd excitations are observed; no resonances were seen at photon energies corresponding to the 5p?ns resonances in the CIS spectra. The ?-plots are interpreted in terms of the parity unfavored channel with jt = 4 being the major contributor at the 5p?nd resonance positions, where jt is the quantum number for angular momentum transferred between the molecule, and the ion and photoelectron. Comparison of the results obtained with those published for bromine shows reasonably good agreement for the CIS spectra but poor agreement for the ?-plots. It appears that parity unfavored channels are playing a greater role in the valence (np)?1 ionization of atomic iodine than in the corresponding ionization of atomic bromine.
0021-9606
244-304
Eypper, Marie
de5d8ecd-5e65-4bc0-b3ce-91574700448d
Innocenti, Fabrizio
2e95973e-c7b9-4166-8bf2-8b06a713fdfa
Morris, Alan
e70d7160-c9d9-4035-90b8-9006a1052551
Stranges, Stefano
6083b375-8a6f-4456-b6bc-54d18f19244c
West, John B.
6e19c4a5-ea05-44bc-9800-e4e299a42eb3
King, George C.
4dfa1a76-f28b-496e-b5d4-638b5e73569e
Dyke, John M.
46393b45-6694-46f3-af20-d7369d26199f
Eypper, Marie
de5d8ecd-5e65-4bc0-b3ce-91574700448d
Innocenti, Fabrizio
2e95973e-c7b9-4166-8bf2-8b06a713fdfa
Morris, Alan
e70d7160-c9d9-4035-90b8-9006a1052551
Stranges, Stefano
6083b375-8a6f-4456-b6bc-54d18f19244c
West, John B.
6e19c4a5-ea05-44bc-9800-e4e299a42eb3
King, George C.
4dfa1a76-f28b-496e-b5d4-638b5e73569e
Dyke, John M.
46393b45-6694-46f3-af20-d7369d26199f

Eypper, Marie, Innocenti, Fabrizio, Morris, Alan, Stranges, Stefano, West, John B., King, George C. and Dyke, John M. (2010) Photoionization of iodine atoms: Rydberg series which converge to the I+(1S0)?I(2P3/2) threshold. The Journal of Chemical Physics, 132 (24), 244-304. (doi:10.1063/1.3447382).

Record type: Article

Abstract

Relative partial photoionization cross sections and angular distribution parameters ? have been measured for the first and fourth (5p)?1 photoelectron (PE) bands of atomic iodine by performing angle-resolved constant-ionic-state (CIS) measurements on these PE bands between the 1D2 and 1S0 (5p)?1 ionic thresholds in the photon energy region of 12.9–14.1 eV. Rydberg series arising from the 5p?ns and 5p?nd excitations are observed in both the first PE band, I+(3P2)?I(2P3/2), and the fourth PE band, I+(1D2)?I(2P3/2), CIS spectra. For each Rydberg state, the resonance energy, quantum defect, linewidth, line shape, and photoelectron angular distribution parameter ? have been determined. For the ?-plots for each PE band, only resonances corresponding to 5p?nd excitations are observed; no resonances were seen at photon energies corresponding to the 5p?ns resonances in the CIS spectra. The ?-plots are interpreted in terms of the parity unfavored channel with jt = 4 being the major contributor at the 5p?nd resonance positions, where jt is the quantum number for angular momentum transferred between the molecule, and the ion and photoelectron. Comparison of the results obtained with those published for bromine shows reasonably good agreement for the CIS spectra but poor agreement for the ?-plots. It appears that parity unfavored channels are playing a greater role in the valence (np)?1 ionization of atomic iodine than in the corresponding ionization of atomic bromine.

Full text not available from this repository.

More information

Published date: 2010
Organisations: Chemistry

Identifiers

Local EPrints ID: 174145
URI: http://eprints.soton.ac.uk/id/eprint/174145
ISSN: 0021-9606
PURE UUID: f65cb79a-e418-47ec-bf61-cd787d2e466d
ORCID for John M. Dyke: ORCID iD orcid.org/0000-0002-9808-303X

Catalogue record

Date deposited: 11 Feb 2011 09:13
Last modified: 20 Jul 2019 01:27

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×