Accurate level energies in the EF1g+, GK1g+, H1g+, B1u+, C1u, B'1u+, D1u, I1g, J1g states of H2

Wim Ubachs (1) , Denise Bailly (2) , Michel Vervloet (3) , Edcel John Salumbides (4)

1 Physics
2 UP11 - Université Paris-Sud - Paris 11
3 SSOLEIL - Synchrotron SOLEIL
4 Physics

By combining results from a Doppler-free two-photon laser excitation study on several lines in the EF1g+ - X1g+ (0,0) band of H2 with results from a Fourier-transform spectroscopic study on a low-pressure discharge in hydrogen, absolute level energies, with respect to the X1g+, v=0, N=0 ground level, could be determined for 547 rovibronically excited states in H2. While for some of the levels in the EF1g+ and B1u+ states the uncertainties are as low as 0.0001 cm-1, the accuracy of other levels is less accurate. The general improvement on the accuracy for the comprehensive data set of level energies is by an order of magnitude with respect to previous measurements. An updated listing of transition wavelengths of the spectral lines in the Lyman and Werner bands is presented, based on combination differences between the presently obtained B1u+ and C1u level energies and those in the X1g+ ground state.

Mots clés: Physical Sciences

Wim Ubachs, Denise Bailly, Michel Vervloet, Edcel John Salumbides. Accurate level energies in the EF1g+, GK1g+, H1g+, B1u+, C1u, B'1u+, D1u, I1g, J1g states of H2. Molecular Physics, 2010, 108 (07-09), pp.827-846. ⟨10.1080/00268970903413350⟩. ⟨hal-00596297⟩