Improved Fits for the Vibrational and Rotational Constants of Many States of Nitrogen and Oxygen
Abstract
All pertinent measurements of the vibrational intervals ∆G(v+ 1/2 ) and rotational constants B_{v} for 11 states of N_{2}, four states of N^{+}_{2}, the ground state of O_{2}, and four states of O^{+}_{2} that could be found in published papers have been assembled and plotted against v. (These are the states important in modeling the fluorescence produced when air is bombarded by fast electrons.) These values of ∆G and B_{v} are compared with values calculated from the standard polynomials in powers of v+ 1/2 , using the coefficients tabulated by Huber and Herzberg (1979), as well as coefficients derived by later analysts, when available. In about 25 percent of the states considered, the coefficients of Huber and Herzberg are found to still yield good fits to the latest available spectroscopic data. In another 25 percent, good fits are obtained from more recently published coefficients. For the remaining 50 percent of the states, new improved coefficients have been derived by leastsquares fitting. The results are tabulated and plotted.
 Publication:

Journal of Physical and Chemical Reference Data
 Pub Date:
 July 1991
 DOI:
 10.1063/1.555892
 Bibcode:
 1991JPCRD..20..685L