D. Bailly, E.J. Salumbides, M. Vervloet, W. Ubachs
By combining results from a Doppler-free two-photon laser excitation study on several lines in the EF1Σ+g - X 1Σ+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 X1Σ +g, v = 0, N = 0 ground level, were determined for 547 rovibronically excited states in H2. While for some of the levels in the EF1Σ+g and B1Σ +u states the uncertainties are as low as 0.0001 cm -1, the accuracy of other levels is lower. The general improvement in 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 B1Σ+u and C1Πu level energies and those in the X1Σ+g ground state. © 2010 Taylor & Francis.
Laboratoire Photophysique Moléculaire, Université de Paris-Sud, Orsay, France; Laser Centre, Vrije Universiteit, 1081 HV Amsterdam, De Boelelaan 1081, Netherlands; Synchrotron Soleil, L'Orme des Merisiers, 91192 Gif-sur-Yvette, Saint-Aubin BP 48, France; Department of Physics, University of San Carlos, Cebu, Philippines
