Ion-pair formation in the photodissociation of HCl and DCI

Andrew J. Yencha; Devinder Kaur; Robert J. Donovan; Agust Kvaran; Andrew Hopkirk; H. Lefebvre-Brion; F. Keller

doi:10.1063/1.466000

Ion-pair formation in the photodissociation of HCl and DCI

Andrew J. Yencha, Devinder Kaur, Robert J. Donovan, Agust Kvaran, Andrew Hopkirk, H. Lefebvre-Brion, F. Keller

Faculty of Physical Sciences

University of Iceland

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

Abstract

The vibrationally resolved excitation functions for Cl^- formation from jet-cooled HCl and DCl, following photoabsorption in the region 75-86 nm (HCl/DCl+hv→H₊/D₊+Cl^-), are reported and compared with ab initio calculations. This completes our understanding of the various possible decay channels available to superexcited states of HCl and DCl that lie above the first ionization limit. Our experimental and theoretical results suggest that the Rydberg states responsible for ion-pair formation in HCl and DCl via predissociation by the V ¹Σ⁺ ion-pair state correspond to ¹Σ⁺ states that are only weakly autoionized. These same Rydberg states appear to act as, at least, one class of precursor states for neutral dissociation to yield excited H* and Cl* atoms.

Original language	English
Pages (from-to)	4986-4992
Number of pages	7
Journal	The Journal of Chemical Physics
Volume	99
Issue number	7
DOIs	https://doi.org/10.1063/1.466000
Publication status	Published - 1993

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title = "Ion-pair formation in the photodissociation of HCl and DCI",

abstract = "The vibrationally resolved excitation functions for Cl- formation from jet-cooled HCl and DCl, following photoabsorption in the region 75-86 nm (HCl/DCl+hv→H+/D++Cl-), are reported and compared with ab initio calculations. This completes our understanding of the various possible decay channels available to superexcited states of HCl and DCl that lie above the first ionization limit. Our experimental and theoretical results suggest that the Rydberg states responsible for ion-pair formation in HCl and DCl via predissociation by the V 1Σ+ ion-pair state correspond to 1Σ+ states that are only weakly autoionized. These same Rydberg states appear to act as, at least, one class of precursor states for neutral dissociation to yield excited H* and Cl* atoms.",

author = "Yencha, \{Andrew J.\} and Devinder Kaur and Donovan, \{Robert J.\} and Agust Kvaran and Andrew Hopkirk and H. Lefebvre-Brion and F. Keller",

year = "1993",

doi = "10.1063/1.466000",

language = "English",

volume = "99",

pages = "4986--4992",

journal = "The Journal of Chemical Physics",

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publisher = "American Institute of Physics",

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TY - JOUR

T1 - Ion-pair formation in the photodissociation of HCl and DCI

AU - Yencha, Andrew J.

AU - Kaur, Devinder

AU - Donovan, Robert J.

AU - Kvaran, Agust

AU - Hopkirk, Andrew

AU - Lefebvre-Brion, H.

AU - Keller, F.

PY - 1993

Y1 - 1993

N2 - The vibrationally resolved excitation functions for Cl- formation from jet-cooled HCl and DCl, following photoabsorption in the region 75-86 nm (HCl/DCl+hv→H+/D++Cl-), are reported and compared with ab initio calculations. This completes our understanding of the various possible decay channels available to superexcited states of HCl and DCl that lie above the first ionization limit. Our experimental and theoretical results suggest that the Rydberg states responsible for ion-pair formation in HCl and DCl via predissociation by the V 1Σ+ ion-pair state correspond to 1Σ+ states that are only weakly autoionized. These same Rydberg states appear to act as, at least, one class of precursor states for neutral dissociation to yield excited H* and Cl* atoms.

AB - The vibrationally resolved excitation functions for Cl- formation from jet-cooled HCl and DCl, following photoabsorption in the region 75-86 nm (HCl/DCl+hv→H+/D++Cl-), are reported and compared with ab initio calculations. This completes our understanding of the various possible decay channels available to superexcited states of HCl and DCl that lie above the first ionization limit. Our experimental and theoretical results suggest that the Rydberg states responsible for ion-pair formation in HCl and DCl via predissociation by the V 1Σ+ ion-pair state correspond to 1Σ+ states that are only weakly autoionized. These same Rydberg states appear to act as, at least, one class of precursor states for neutral dissociation to yield excited H* and Cl* atoms.

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U2 - 10.1063/1.466000

DO - 10.1063/1.466000

M3 - Article

SN - 0021-9606

VL - 99

SP - 4986

EP - 4992

JO - The Journal of Chemical Physics

JF - The Journal of Chemical Physics

IS - 7

ER -

Ion-pair formation in the photodissociation of HCl and DCI

Abstract

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