Dunham’s theory

Basis of analysis beyond Dunham s theory, by van Vleck and others 4. Basis of application of Dunham s and van Vleck s theory to analysis 262... 

BASIS OF ANALYSIS BEYOND DUNHAM S THEORY, BY VAN VLECK AND OTHERS... 

BASIS OF APPLICATION OF DUNHAM S AND VAN VLECK S THEORY TO ANALYSIS OF DIATOMIC SPECTRA... 

There exists no significant comprehensive fit of spectral data of H2 with which we might here make comparison. Our discussion above demonstrates that, as for GaH above, application of an algorithm based on Dunham s algebraic approach to analysis of vibration-rotational spectral data of H2, especially through implementation of hypervirial perturbation theory [30,72] that allows the term for the vibrational g factor in the hamiltonian in formula 29 to be treated directly in that form, proves extremely powerful to derive values of fitting parameters that not only have intrinsic value in reproducing experimental data of wave numbers of transitions but also relate to other theoretical and experimental quantities. 

Although authors [74,75] have claimed that a generator-coordinate theory yields an expression for spectral terms exactly of Dunham s form, as in formula 8, in which however term coefficients encompass intrinsically elfects of at... 

The effects of X7 may be treated using ordinary non-degenerate perturbation theory or, as in Dunham s original work, by means of the Wentzel-Kramers-Brillouin method... 

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