Fourier transform spectroscopy analysis of the 3dhyphen;triplet complex visible emission spectra of H2

摘要

An investigation of the triplet 3dhyphen;complex of H2, theg(3d)3Sgr;+g,i(3d)3Pgr;g, andj(3d)3Dgr;gand the nearbyh(3s)3Sgr;+gelectronic states, has been performed. The 3s,3drarr;c(2p)3Pgr;minus;uvisible emission spectra have been obtained with a low pressure discharge lamp and recorded with a Fourier transform spectrometer. Transition wave numbers and rotational energy levels are given forv=0ndash;3 of the four states. An effective Hamiltonian is used to fit the data, which shows the rotational breakdown of the Bornndash;Oppenheimer approximation due to theLhyphen;uncoupling effect. The eigenvectors obtained from this model provide considerable insight into the nature of the 3dhyphen;complex. Furthermore, the model shows the mixing between the 3dstates and theh(3s)3Sgr;+gstate which is particularly strong for lowervvalues. Molecular constants, coupling parameters, and term values are also given.