Selected fundamental constants and conversion factors

The evaluation of molecular constants from the measured frequencies of spectral lines needs best values of the fundamental constants. The best values improve with advancing techniques of measurement and changes in valuation. The recommended values listed in the following table are based on the publication by Mohr, Taylor, and Newell [12]. 

This quantity measures the projection of the moment vector on the quantization axis in the state where the spin vector shows its maximum projection. Thus, a negative sign indicates that the moment vector is oriented anti-parallel to the spin vector, a positive one that they are parallel. 

Some of the values in the above table yield the conversion factor 1-B relating rotational constant to moment of inertia  

Note that authors may have used slightly variant values in their original work which is normally not corrected in the tables. 

The following table for conversion between different energy scales may be used (uncertainties are all about 3 ppm if needed, more accurate values maybe calculated from the preceding table)  

75Kro Kroto, H. W. Molecular Rotation Spectra , John Wiley Sons, New Yoik, 1975. 

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Selected fundamental constants and energy conversion factors... 

Lamarsh, J. R. 1972. Introduction to Nuclear Reactor Theory. Reading, MA Addison Wesley Publishing. This publication is based on a one-year course in nuclear reactor theory at Cornell and New York universities. The book gives readers a fundamental understanding of the principles regarding the operation of a nuclear reactor. References and exercises are included at end of each chapter. Appendices cover conversion factors, selected constants, isotopes of importance in nuclear engineering, and properties of selected molecules. 

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