Magnetic rotation observation of the C 2b3Σ g- ← a3Π u transition using a color center laser
Abstract
The magnetic rotation observation of the C 2b3Σ g- ← a3Π u Ballik-Ramsay system using a color center laser is reported. This is the first detection of this system in absorption. Three bands, 0 ← 1, 1 ← 2, and 2 ← 3, were identified in the spectral range 3650-4030 cm -1. The last two bands were observed for the first time. In magnetic rotation many satellite lines (∆ N ≠ ∆ J) which would be very weak in normal absorption have been observed with intensity comparable to the main branch lines. This permits a slight improvement in the accuracy of some of the fine structure constants. A variety of lineshapes are observed for the various branches by magnetic rotation. Because the b3Σ g- fine structure is small, giving a partial overlap, the peak frequency of a magnetic rotation signal usually does not correspond to the center frequency of the normal absorption signal of that transition. A computer program has been written to predict magnetic rotation lineshapes and obtain the peak frequency displacements. Various observed and calculated lineshapes are displayed and compared.
- Publication:
-
Journal of Molecular Spectroscopy
- Pub Date:
- August 1985
- DOI:
- 10.1016/0022-2852(85)90174-2
- Bibcode:
- 1985JMoSp.112..436Y