Resonances of thej3Δgstate in the differen

Abstract

Resonances in the differential photodissociation cross section of H2 are studied. Photon excitation from the metastable c II"state occurs around resonances in the j hg state lying in the continuum of the i II~state. The j hg state is coupled to the continuum by the nuclear rotation. Since direct excitation to the continuum can also occur, interference is present, which expresses itself as a change in anisotropy of the photofragments as the photon energy is scanned over a resonance. Fano parameters, linewidths, and anisotropy parameters are obtained from the measured differential cross sections and are treated theoretically as outlined in the preceding paper Siebbeles, Phys. Rev. A 44, 1577 (1991)]. The experimental and calculated results are in good agreement.

Consequences of electronic-state mixing on the dynamics of photodissociation ofH2by barrier tunneling

“…Note the interchange of the labels between the two g and 8 Xg state potential-energy curves with respect to Ref. [1] in accord with the recommendation of Ref. [7].…”

“…The experimental and calculated cross sections in Ref. [1] exhibit discrepancies. The calculated cross sections and anisotropy parameters were obtained by an adiabatic description, only taking into account the~' ll state.…”

“…Recently [1] we reported on the differential cross section for photodissociation of H2 by tunneling through the barrier in the electronic potential of the~' H state; see Fig. 1.…”

“…[1], a fast beam of Hz in several rovibrational levels of the metastable c II"state is created by charge exchange of H2+ on Cs vapor. The The experimental results are those from Ref.…”

Spectral identification of diffuse resonances in H2 above the n = 2 dissociation limit

“…The quantum states of triplet symmetry have been investigated over many decades; we refer to the metastable c 3 u , v = 0 state discovered by Lichten, 1 later used to perform high-resolution laser spectroscopic studies, 2 and the studies on dissociation in the triplet manifold. 3,4 The spin-orbit interaction between levels of singlet and triplet symmetry is very small, to the extent that for a long time the separation between singlet and triplet quantum levels was erroneously deduced. 5 In this investigation on the level structure of singlet symmetries in H 2 the effect of the triplet states can be safely ignored.…”