|Date of Entry||September 2009|
|Frequency / GHz||177.8-517.6|
|Egy / (cm-1)|
|μa / D|
|μb / D|
|μc / D|
|A / MHz||602873.269(53)|
|B / MHz||243150.415(86)|
|C / MHz||169875.877(79)|
"The Microwave Spectrum of the NHD Radical in the Ground electronic state, (X 2A")," K. Kobayashi, H. Ozeki, S. Saito, M. Tonooka and S. Yamamoto, Journal of Chemical Physics, Volume 107, Pages 9289 -9296(1997).
The coupling scheme of angular momenta,
J = N + S, F1 = J + IN, F2 = J + IH and F = F1 + ID
In the low - N transitions, many components other than the main selection rule, ΔF = ΔF2 = ΔF1 = ΔJ, were also observed. These weaker components were often overlapped with the other components.
Unresolved lines were included in the least-squares fit by using the averaged frequency of the component lines weighted by their relative intensities. The weight is usually calculated by first-order theory, that is, intensity of a transition is calculated by using representative basis functions of specific levels.
The relative intensity contain neither dipole moment nor partition function contribution.
When the line is the overlap of the multiple components, the relative intensity shows the summation of those of each components.