In:
The Journal of Chemical Physics, AIP Publishing, Vol. 121, No. 21 ( 2004-12-01), p. 10513-10518
Abstract:
The doubly excited valence (3p+3p) 2 1Δg state of Na2 is experimentally observed by using optical-optical double resonance spectroscopy. A single line Ar+ laser (a total of nine lines) was used to pump the sodium dimers from thermally populated ground state X 1Σg+ to the intermediate B 1Πu state. Then, a single mode Ti:sapphire laser was used to probe the doubly excited 2 1Δg state. Violet fluorescence emitted from the highly excited states (mainly 2 3Πg or 3 3Πg states which are transferred from 2 1Δg state via collision) to the a 3Σu+ state was monitored by a filtered photomultiplier tube (PMT). A total of 582 rovibrational levels of 2 1Δg state were observed, identified, and assigned to the vibrational and rotational quantum numbers in the range of 0⩽v⩽28 and 11⩽J⩽99, respectively. The absolute vibrational quantum number assignment was verified by comparing the totally resolved fluorescence with the calculated Franck-Condon factors between 2 1Δg state and B 1Πu state. Dunham coefficients and Rydberg-Klein-Rees potential curve were derived from these observed quantum levels. The primary molecular constants of Na2 2 1Δg state are Te=32 416.759(15) cm−1, ωe=124.8484(36) cm−1, Be=0.119 158(3) cm−1, and Re=3.508 20(5) Å.
Type of Medium:
Online Resource
ISSN:
0021-9606
,
1089-7690
Language:
English
Publisher:
AIP Publishing
Publication Date:
2004
detail.hit.zdb_id:
3113-6
detail.hit.zdb_id:
1473050-9
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