Ground-state constants A 0 and DK 0 of 12CH3I from perturbation-allowed transitions |
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| Authors: | R Anttila V-M Horneman S Alanko |
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| Institution: | Department of Physics , University of Oulu, Linnanmaa , SF-90570 , Oulu , Finland |
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| Abstract: | The upper levels of the bands v 5 and v 3 + v 6 of CH3I are coupled through a Fermi and an l(2, -1) resonance. This gives rise to perturbation-allowed transitions. Altogether, more than 200 such lines corresponding to three different K-value pairs have been observed between 1320 cm-1 and 1520 cm-1. By fixing the sextic constant HK 0 equal to zero, the following values were obtained: A 0 = 5·173931(2) cm-1 and DK 0 = 87·36(6) × 10-6 cm-1. The possible values of HK 0 and their effects on the results are discussed. |
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