Magnetic Rotation Spectra of Nitric Oxide in the Near Infrared

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Abstract
Magnetic rotation spectra of the 3–0 band at 1.8 μ and a portion of the 2–0 band at 2.7 μ of nitric oxide have been observed and recorded. Rotations in excess of 10° in fields of 2400 gauss have been observed in some cases. The P and R branch lines arising from the 2II½ states show negative rotation (counter clockwise when looking against the incident light) while the P and R branches from the II322 states show positive rotation. The Q branch signals are more complex and both positive and negative rotations are observed. Certain anomalies in the magnetic rotation spectrum of the 3–0 band are noted.