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The absolute frequencies of 53 new cw laser lines of the 00 degrees 2-[10 degrees 1, 02 degrees 1](I, II) bands of the (12)C(18)O(2) laser have been measured by heterodyning with the well-known (12)C(16)O(2) laser frequencies in a tungsten-nickel diode. The measured frequencies were used to calculate the band-center frequencies and rotational constants.
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K.J. Siemsen (1981) studied this question.
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