Abstract
We describe a precision interferometer calibration technique useful for the measurement of the wavelength of atomic and molecular transitions with megahertz accuracy. Using this technique, the wavenumber of the ith hyperfine component of the 127I2 B-X R(73) 5-5 transition, which falls within the Doppler width of the hydrogen Balmer-α line, has been determined to be 15233.367390(42) cm−1.
© 1979 Optical Society of America
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