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  • 1
    Electronic Resource
    Electronic Resource
    A nomenclature for Λ-doublet levels in rotating linear molecules (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 1749-1753 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: It is proposed that the two Λ-doublet levels of linear molecules with nonzero electronic orbital angular momentum be labeled Λ(A') and Λ(A‘), e.g., Π(A') and Π(A‘) for Π states, etc., according to the following prescription: All series of levels in which the electronic wave function at high J is symmetric with reflection of the spatial coordinates of the electrons in the plane of rotation will be designated Λ(A') for all values of J, and all those for which the electronic wave function is antisymmetric with respect to reflection will be denoted Λ(A‘). It is emphasized that this notation is meant to supplement, and not replace, the accepted spectroscopic e/f labeling and the parity quantum number. The utility of the Λ(A')/Λ(A‘) notation is that it is of most relevance in the mechanistic interpretation of reactive or photodissociative processes involving open-shell molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455121
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Predissociation of the NH/ND(c 1Π,v',J') states (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 5059-5068 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The predissociation of the electronically excited NH/ND(c 1Π) state was studied by accurate lifetime measurements. The pulsed generation of single rotational states of different vibrational levels was performed by dye laser excitation in the NH/ND c 1Π–a 1Δ band system. The lifetime of ND(c,v'=0,J'=1) is 500±10 ns. This value is close to the purely radiative lifetime of the rotationless state. The lifetime increases steadily up to J'=15. The lifetime of ND(c,v'=1) is 235 ns for very low J' and decreases for higher J'. These shorter lifetimes are due to predissociation by the repulsive 1 5Σ− state. Similarly, the NH(c,v'=0) state is predissociated for all J', having an average lifetime of 463 ns for J'=1–7. For J'〉7, the lifetime decreases steadily. The lifetime of NH(c,v'=1) is dominated by predissociation, with values near 65 ns for J'=1–6. These experimental results are found to be in very good agreement with an ab initio electronic structure calculation of the radiative and predissociative decay rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.462750
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    Paper (German National Licenses)
    Fulltext
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