MURAL - Maynooth University Research Archive Library



    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(-)]


    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

    [img]
    Preview
    Download (172kB) | Preview


    Share your research

    Twitter Facebook LinkedIn GooglePlus Email more...



    Add this article to your Mendeley library


    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
    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
    Date Deposited: 03 Feb 2017 17:12
    Journal or Publication Title: Journal of Chemical Physics
    Publisher: American Institute of Physics
    Refereed: Yes
    URI:

    Repository Staff Only(login required)

    View Item Item control page

    Downloads

    Downloads per month over past year