High resolution vacuum ultraviolet emission spectrum of D2: The B' 1Sigmau+-->X 1Sigmag+ band system

International audienceIn this work, we have extended our previous high resolution study of the vacuum ultraviolet emission spectrum of the D2 molecule [M. Roudjane, et al. J. Chem. Phys. 125, 214305 (2006)] up to 124.2 nm in order to investigate the B' 1Sigmau+-->X 1Sigmag+ band system. The analysis of the spectrum has been carried out by means of a complex spectrum visual identification code IDEN [V. I. Azarov, Phys. Scr. 44, 528 (1991); 48, 656, (1993)] and supported by theoretical calculations using ab initio data [L. Wolniewicz, J. Chem. Phys. 103, 1792 (1995); 99, 1851 (1993); G. Staszewska and L. Wolniewicz, J. Mol. Spectrosc. 212, 208 (2002); L. Wolniewicz and G. Staszewska, 220, 45 (2003)] which provided level energies and transition probabilities. More than 1480 new emission lines have been observed and 109 bands belonging to the B' 1Sigmau+-->X 1Sigmag+ system have been identified between 84.1 and 121.6 nm. Except for the upsilo'-0 bands that were reported in absorption [I. Dabrowski and G. Herzberg, Can. J. Phys. 52, 1110 (1974)], all the upsilo'-upsilo'' bands are reported here for the first time. The analysis led to the determination of 111 rovibronic energy levels in the B' 1Sigmau+ state, of which 31 with higher rotational numbers J are new. Observed perturbations are accounted for through a set of coupled equations involving the four excited electronic states B 1Sigmau+, B' 1Sigmau+, C 1Piu, and D 1Piu and including nonadiabatic couplings. The solution of this set provides the percent contribution of these four states to each of the observed rovibronic level

High resolution vacuum ultraviolet emission spectrum of D2 from 78 to 103 nm: The D 1Piu-->X 1Sigmag+ and D' 1Piu--->X 1Sigmag+ band systems

International audienceThe emission spectrum of the D2 molecule has been studied at high resolution in the vacuum ultraviolet region 78.5-102.7 nm. A detailed analysis of the two D 1Piu-->X 1Sigmag+ and D' 1Piu--->X 1Sigmag+ electronic band systems is reported. New and improved values of the level energies of the two upper states have been derived with the help of the program IDEN [V. I. Azarov, Phys. Scr. 44, 528 (1991); 48, 656 (1993)], originally developed for atomic spectral analysis. A detailed comparison is made between the observed energy levels and solutions of coupled equations using the newest ab initio potentials by Wolniewicz and co-workers [J. Chem. Phys. 103, 1792 (1995); 99, 1851 (1993); J. Mol. Spectros. 212, 208 (2002); 220, 45 (2003)] taking into account the nonadiabatic coupling terms for the D 1Piu state with the lowest electronic states B 1Sigmau+, C 1Piu, and B' 1Sigmau+. A satisfactory agreement has been found for most of the level energies belonging to the D and D' states. The remaining differences between observation and theory are probably due to nonadiabatic couplings with other higher electronic states which were neglected in the calculations

Phospholipid transfer protein: full-length cDNA and amino acid sequence in maize

International audienc

MOLAT : Atomic and Molecular Physics Databases of the Paris MOLAT : Atomic and Molecular Physics Databases of the Paris Observatory

International audienc

MOLAT : Atomic and Molecular Physics Databases of the Paris MOLAT : Atomic and Molecular Physics Databases of the Paris Observatory

International audienc