Abstract

Using crossed molecular and laser beams, we measure the transition frequencies of six lines in the B 1ΠuX 1Σg+ (6-0) band of 39K2. We do this by direct interferometric comparison with a (3He –22Ne 129I2:B) standard laser Our results for P(19), P(20), R(29), Q(30), Q(23), and Q(24) are accurate to 2 parts in 109.

© 1985 Optical Society of America

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