Leung, Allen W.K. and McCaffrey, John G. and Breckenridge, W.H.
(1998)
Spectroscopic characterization of the unusually strongly bound, doubly excited van der Waals state, Mg(3p pi 3p pi P-3(J))center dot Kr[(3)Sigma(-)].
Journal of Chemical Physics, 109 (18).
pp. 7777-7783.
ISSN 0021-9606
Abstract
The unusual doubly excited van der Waal's state, Mg(3 p pi 3 p pi P-3(J)).Kr[(3)Sigma(-)], has been characterized using a laser-vaporization, supersonic-jet source and R2PI (Resonance Two-Photon Ionization) spectroscopy. This state is very strongly bound (D-e,= 3966 cm(-1)) and has a short bond length (R-e = 2.45 Angstrom) compared to its singly excited analogue, Mg(3 s 3 p pi P-3(J)).Kr[(II0)-I-3-], for which D-e = 267 cm(-1) and R-e = 3.48 Angstrom. In fact, this state is even more than twice as strongly bound as the ground-state Mg(3s)(+).Kr ion, where D-e = 1949 cm(-1) and R-e approximate to 2.8 Angstrom. Possible reasons for the strong van der Waal's bonding are discussed, and it is concluded that the lack of sigma-sigma repulsion because there is no Mg(3s sigma) valence electron must be a major factor; the similar ionic van der Waal's state Mg+ (3p pi).Kr[(II)-I-2], which would be obtained by removing one of the Mg(3p pi) electrons, is even more strongly bound, with D-e approximate to 7200 cm(-1) [J. S. Pilgrim, C. S. Yeh, K. R. Berry, and M. A. Duncan, J. Chem. Phys. 100, 7945 (1994)]
Item Type: |
Article
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Keywords: |
Spectroscopic characterization; strongly bound; doubly excited; van der Waals state; |
Academic Unit: |
Faculty of Science and Engineering > Chemistry |
Item ID: |
7862 |
Identification Number: |
https://doi.org/10.1063/1.477423 |
Depositing User: |
Dr. John McCaffrey
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Date Deposited: |
03 Feb 2017 17:12 |
Journal or Publication Title: |
Journal of Chemical Physics |
Publisher: |
American Institute of Physics |
Refereed: |
Yes |
URI: |
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Use Licence: |
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