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An experimental and theoretical investigation of the valence double photoionisation of the IC molecule
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
2007 (English)In: Chemical Physics, ISSN 0301-0104, E-ISSN 1873-4421, Vol. 332, no 2-3, 249-254 p.Article in journal (Refereed) Published
Abstract [en]

The double valence photoelectron spectrum of ICl has been measured at two photon energies,303.78 angstrom and 379.3 angstrom, by the TOF-PEPECO technique. Relativistic molecular electronic structure calculations have been performed for electronic states connected to the three lowest groups of dissociation limits to support the interpretation, and vibrational constants have been calculated for the quasi-bound states. The two lowest double ionisation energies are found to be 27.45 +/- 0.1 eV (vertical) and 27.69 +/- 0.1 eV (vertical). They are associated with the X-3 Sigma(-)(0.1), electronic states of ICl2+, respectively, which are the only states predicted to be stable by the calculations. The two following states connected to the same configuration are in order a (1)Delta(2), and b (1)Sigma(+)(0). The double ionisation processes building up the spectrum are found to be mainly direct, and energies and widths of the bands are well reproduced by the calculations.

Place, publisher, year, edition, pages
2007. Vol. 332, no 2-3, 249-254 p.
Keyword [en]
double photoionisation, ICl, TOF-PEPECO, relativistic, ab initio
National Category
Physical Sciences Chemical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-145771DOI: 10.1016/j.chemphys.2006.12.006ISI: 000244549500011OAI: oai:DiVA.org:uu-145771DiVA: diva2:396797
Available from: 2011-02-11 Created: 2011-02-11 Last updated: 2017-12-11Bibliographically approved

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