The double photoionization of HI molecules has been investigated using vacuum ultraviolet synchrotron radiation in the energy range between 27 and 35 eV. The product ions have been detected by the use of time-of-flight mass spectrometry and the threshold energy for HI2+ and H++I+ formation has been determined. These results have been interpreted by the use of a theoretical model which has been previously applied by us to HBr2+ and HCl2+. On the basis of the reliability of such a model, an assessment of the systematic trends of the bond features along the HX2+ X=F, Cl, Br, I homologous series is given in this paper. In particular, the increase of the stability of these dications, in their lowest electronic states, when going towards the heavier molecules, has been rationalized considering the systematic variation of the charge transfer coupling between the H–X2+ and the H+–X+ states.

The double photoionization of hydrogen iodide molecules / M., Alagia; B. G., Brunetti; P., Candori; S., Falcinelli; M. M., Teixidor; F., Pirani; R., Richter; Stranges, Stefano; F., Vecchiocattivi. - In: THE JOURNAL OF CHEMICAL PHYSICS. - ISSN 0021-9606. - STAMPA. - 124:20(2006), p. 204318. [10.1063/1.2201742]

The double photoionization of hydrogen iodide molecules

STRANGES, Stefano;
2006

Abstract

The double photoionization of HI molecules has been investigated using vacuum ultraviolet synchrotron radiation in the energy range between 27 and 35 eV. The product ions have been detected by the use of time-of-flight mass spectrometry and the threshold energy for HI2+ and H++I+ formation has been determined. These results have been interpreted by the use of a theoretical model which has been previously applied by us to HBr2+ and HCl2+. On the basis of the reliability of such a model, an assessment of the systematic trends of the bond features along the HX2+ X=F, Cl, Br, I homologous series is given in this paper. In particular, the increase of the stability of these dications, in their lowest electronic states, when going towards the heavier molecules, has been rationalized considering the systematic variation of the charge transfer coupling between the H–X2+ and the H+–X+ states.
2006
01 Pubblicazione su rivista::01a Articolo in rivista
The double photoionization of hydrogen iodide molecules / M., Alagia; B. G., Brunetti; P., Candori; S., Falcinelli; M. M., Teixidor; F., Pirani; R., Richter; Stranges, Stefano; F., Vecchiocattivi. - In: THE JOURNAL OF CHEMICAL PHYSICS. - ISSN 0021-9606. - STAMPA. - 124:20(2006), p. 204318. [10.1063/1.2201742]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/66996
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