Ultraviolet Absorption Spectra of Transition Metal Atoms in Rare-Gas Matrices

摘要

Absorption spectra were obtained of chromium, manganese, iron, cobalt, copper, nickel, tin and palladium atoms trapped in argon matrices at 4.2 K and of iron and copper in krypton and xenon matrices at 4.2 and 20 K. These spectra were studied in the region from 2200 and 4000 A. The observed transitions were found to correlate with gas phase transitions of the atoms, under the assumption of a matrix and atomic configuration dependent shift of the atomic transitions from the gas phase. Energy shifts of the transitions were inversely proportional to matrix atom size. Atom diffusion and resultant aggregation within the matrix both during the condensation of the solid from the gas phase and during warming was found to be a significant effect. Oscillator strengths calculated from the observed spectra were 10 to 100 times less than gas phase values indicating considerable diffusion during deposition. (Author)