Study of the LiHg excimer: Blue–green bands

Abstract

We report for the first time the production of the LiHg excimer by a photochemical reaction of excited Li2 molecules with Hg(6s 2 ISO)' Excitation energy was provided by a cw ultraviolet (UV)-argon ion laser operating in single-line and in multi-line mode or by pulsed XeCI excimer laser at 3080 A. We observed bound-free emission of LiHg in the form of diffuse bands peaking at 4450 and at 4670 A. The latter was structured by bound-bound emission lines. Relativistic ab initio calculations for the potential energy curves of LiHg and for the relevant dipole transition moments were performed. Using these results, an interpretation of the observed emission is presented.

Spectral simulation and interpretation of LiZn and LiCd blue-green emission

“…Recently we reported the first observation of blue-green bands of LiZn and LiCd molecules produced by a photochemical reaction of excited Li2(CaH,) molecules with ground state zinc and cadmium atoms respectively [1], [2]. Analogous LiHg bands have been observed by the groups in Pisa and Graz [3].…”

Production of the NaHg Molecule by Reactive Three-Body Collisions following Energy-Transferring Processes of Laser-Excited Na(3 2P) Atoms

“…13 As a reaction vessel, we used a stainless steel crossed heat pipe oven with an inner diameter of 25 mm terminated by four quartz windows. Argon was used as the buffer gas.…”

Bonding in Mercury-Alkali Molecules: Orbital-driven van der Waals Complexes

“…Mercury-alkali compounds are potential candidates for excimer laser action and therefore all HgA systems described in this work have been investigated by experimental means. HgLi and its potential energy curve were studied by molecular beam scattering experiments [ 40 – 43 ], laser spectroscopy [ 44 – 48 ], and quantum chemical calculations [ 19 , 49 ]. Similar investigations were carried out for HgNa (molecular beam scattering experiments [ 50 , 52 , 53 ], pseudopotential calculations [ 19 , 54 ], and relativistic all-electron calculations [ 55 , 56 ]) and HgK (molecular beam scattering experiments, [ 51 , 57 , 58 ] pseudopotential calculations [ 59 ]).…”