Electronic Spectra and Electronic Relaxation in Mercury Van Der Waals Complexes Studied in a Supersonic Jet
The van der Waals complexes of mercury (Hg) with rare gases (RG = Ne, Ar, Kr, and Xe) and simple molecules (CH4 and N2) were prepared in a supersonic jet. By the use of laser induced fluorescence excitation technique, potential energy curves and spectroscopic constants of HG-RG complexes were determined for the X̃, Ã, and B̃ electronic states. Potential depths of the X̃ and B̃ states were found to be linearly proportional to the polarizabilities of individual RG atoms. In the case of HgAr and HgKr, metastable Hg(3P0)-RG which is optically forbidden from the ground state complex was synthesized and the laser double resonance on the ã-C̃, ã-D̃ transitions of the complex has revealed the potential curve of the ã state which has double minimum in the case of HgAr. In the Hg-molecule(M) complexes, photo-dissociation reaction accompanied by the electronic relaxation of Hg (3P1 to 3P0) was found to occur under a collision free condition. van der Waals bending motion as well as the rotational motion characteristic to the Hg-M complex seemed to play a crucial role in the reaction.
KeywordsSpectroscopic Constant Potential Depth Collision Complex Ground State Complex Vibrational Spacing
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