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Millimeter-wave optical double resonance spectra of NO2: How good a quantum number is N?
- Source :
-
Journal of Chemical Physics . 10/15/1986, Vol. 85 Issue 8, p4297. 7p. 3 Charts, 6 Graphs. - Publication Year :
- 1986
-
Abstract
- Optical transitions to the 2B2 electronic state region of NO2 have been observed in double resonance with three millimeter-wave ground state rotational transitions. The probed ground state transitions were the N=2 (F1), N=4 (F1), and N=10 (F2), K=0→1 Q branch transitions near 250 GHz. The optical range scanned was 16 800 to 16 950 cm-1. The 100,10–101,9 F2 spectrum was combined with previous double resonance results with the ground state 91,9–100,10 F1 transition. This comparison shows 70 out of 160 upper states with J=19/2 to have indefinite or mixed N values. It establishes violations of the ΔN=ΔJ selection rule in this spectral region which contains bands with a wide range of spin-rotation constants. Lack of intensity correlation between the two spectra suggests two classes of upper states are present: a group of strongly N-mixed upper states, and a group essentially unmixed in N. Heller’s F parameter, which measures the fraction of all possible symmetry-restricted basis states contributing to a typical eigenstate, is similar for the double-resonance spectra of the three N values, but is greater for K=1 than for K=0. By finding upper states in common, R lines from N=2 and P lines from N=4 have been identified. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NITRIC oxide
*OPTICAL resonance
*PHASE transitions
Subjects
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 85
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 7645546
- Full Text :
- https://doi.org/10.1063/1.451825