The optical spectrum of the doubly charged molecular nitrogen ion: Rotational analysis of the (0-0) and (1-1) bands of the D1Σu+-X1Σg+ transition of N22+: Comparison of observations with Ab-initio calculation results |
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Authors: | D Cossart F Launay JM Robbe G Gandara |
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Institution: | Laboratoire de Photophysique Moléculaire du CNRS, Bâtiment 213, Université de Paris-Sud, 91405 Orsay Cedex, France |
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Abstract: | Emission spectra obtained in the 1550–1650 Å region with a 10-m vuv spectrograph are conclusively assigned to the N22+ ion. The 1589-Å band, previously observed by Carroll, and a new band of the same system, have been rotationally analyzed. Ab-initio calculations have been performed which support the assignment of these two bands to the D1Σu+-X1Σg+ system. The calculations also explain the observed breaking-off points in the branch structure as well as weakening and broadening of the other expected bands. These phenomena arise from electron configuration changes and perturbation effects in the ground state. |
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Keywords: | To whom correspondence should be sent |
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