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    Spectroscopic characterization of the weakly bound Ca(4s4dσ 3D3)⋅Ar[3Σ+] state: Evidence for a substantial maximum in the potential curve at long range


    Leung, Allen W.K. and Kaup, John G. and Bellert, D. and McCaffrey, John G. and Breckenridge, W.H. (1999) Spectroscopic characterization of the weakly bound Ca(4s4dσ 3D3)⋅Ar[3Σ+] state: Evidence for a substantial maximum in the potential curve at long range. Journal of Chemical Physics, 111 (6). pp. 2484-2489. ISSN 0021-9606

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    Abstract

    The weakly bound Ca(4s4dσ 3D3)⋅Ar[3Σ+] state has been characterized by means of R2PI (Resonant Two-Photon Ionization) spectroscopy, using transitions from the Ca(4s4pπ 3P0)⋅Ar[3Π0⎯] metastable state prepared in a laser-vaporization/supersonic jet source. Because several of the vibrational levels are above the dissociation limit [to Ca(4s4d 3D3)+Ar(1S0)], it is concluded that there must be a substantial maximum in the Ca(4s4dσ 3D3)⋅Ar[3Σ+] potential curve (>200 cm−1) at large R (>4.0 Å). This is discussed, and shown to be consistent with our earlier ideas of “penetration” of outerlobes of electron density of metal atom excited states by RG (rare-gas) atoms. Perturbations observed, due to possible potential curve crossings with states of different electronic symmetry, are also discussed.

    Item Type: Article
    Keywords: Der-Waals Molecules; Vanderwaals Complex; Rydberg States; Interatomic Potentials; Excitation Spectrum; Electronic states; Valence States; Transitions; Atoms; Inar;
    Academic Unit: Faculty of Science and Engineering > Chemistry
    Item ID: 12550
    Identification Number: https://doi.org/10.1063/1.479526
    Depositing User: Dr. John McCaffrey
    Date Deposited: 09 Mar 2020 16:58
    Journal or Publication Title: Journal of Chemical Physics
    Publisher: American Institute of Physics
    Refereed: Yes
    URI:

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