Absorption Bands in the Spectra of Mixtures of Metallic Vapors

Physics

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Scientific paper

Evidence of the existence of HgTl molecules in the vapor state.-It is shown by experiment that at a given temperature the amount of thallium in the vapor state is increased by adding mercury vapor. This indicates definitely that thalliummercury molecules are formed. Absorption bands of HgTl molecules.-In a mixture of thallium and mercury vapors a number of bands appear in absorption which are to be attributed to the HgTl molecule. In no case was the resolving power sufficient to show structure. Asymmetric broadening of the atomic Tl lines and of the Cd line 2288 due to Hg vapor has been observed. Two possible explanations are discussed: broadening due to a superimposed molecular band, and broadening due to transfer of kinetic energy by collisions. Absorption bands of InCd molecules.-Absorption bands due to InCd molecules were observed in mixtures of In and Cd vapors at temperatures of 400°, 500° and 800°C. Their short wave-length limits are tabulated. A few showed traces of their structure but the resolving power was not sufficient to make measurements possible.

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