Rotational Hyperfine Structure of CD₃I

Abstract

The hyperfine structure of the ground state rotational spectrum of C D 3I is remeasured with a greater accuracy and reanalyzed. The determinability of the hyperfine constants is discussed.

High-Resolution Rotational Spectroscopy of CH3I Using a Novel Doppler-Free Technique

“…and to improve its accuracy. It is interesting, however, to compare the present result with the dipole moment in the V. CONCLUSION ground state (14,15); one can see that in the £ 6 Å 1 state the dipole is about 0.7% smaller. This fact confirms the trend We described a new spectroscopic technique which has high resolution and great sensitivity, comparable to the best Doppler-free standard methods.…”

“…They can be found in classical textbooks, and through the years the accuracy of their meaThe final data set contains 149 measurements of fields and frequencies for 28 Stark components of a single hyperfine surement has been remarkably improved. The case of CH 3 I, however, was more troubled than the others, and only re-transition; the maximum Stark shift is about 12 MHz, and the electric field strengths are always smaller than 170 V/ cently reliable values for the ground state dipole moment have been reported in the literature (14,15). The situation cm.…”

Spectre de rotation millimétrique et submillimétrique d' ICN dans l' état 0110

“…Pour réduire les effets des erreurs systématiques on peut utiliser les éclatements de structure hyperfine (différences de fréquences) au lieu des fréquences comme données du calcul de moindres carrés. Dans ce cas il faut tenir compte des corrélations entre les données [21]. Un calcul effectué dans ces conditions donne : eqv Q = -2 411,52 (12) MHz ; eN = -12,9 ( 19 ) kHz et xj = 1,081 (89) kHz.…”