VIBRONIC STRUCTURES AND PREDISSOCIATION DYNAMICS OF TRIATOMIC CLUSTER $HgAr_{2}$

TL;DRAbstract

An $HgAr_{2}$ triatomic cluster was investigated by the measurement of laser induced fluorescence spectra of the $\\bar{A}-\\bar{X}$ and $\\bar{B}-\\bar{X}$ transitions and optical-optical double resonance spectra of the $\\bar {E}-\\bar{A}$ transitions. The fundamental wavenumbers were determined to be $\\omega_{1} = 26.1, \\omega_{2} = 11.9,$ and $\\omega_{3} = 28.4 cm^{-1}$ for the $\\bar{A}$ state and $\\omega_{1} = 20.6$ and $\\omega_{2} = 10.1$ $cm^{-1}$ for the $\\bar{B}$ state. A large amplitude motion of one Ar atom with respect to an HgAr ion core was proposed as an characteristic vibrational motion in the lowest Rydberg $\\bar {E}$ state based on the fundamental wavenumbers of $\\omega_{1} = 102$ and $\\omega_{2} = 5$ $cm^{-1}$. The predissociation process in the B state, $HgAr_{2} (\\bar{B}) \\rightarrow HgAr(A)+Ar$, was also investigated. Using the vibrational state distribution of the HgAr fragment in the A state, the dissociation energies of $HgAr_{2}$ to $Hg + Ar + $Ar

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