Magnetic circular dichroism study of matrix-isolated iron atoms

Lifetimes of several electronic states of matrix-isolated iron, cobalt, and nickel atoms

“…13 As for Fe atoms in Ar, features in the EXAFS pattern14 are interpreted as indicating metal atoms in substitutional sites. In a very recent visible-UV absorption and MCD study of Fe atoms isolated in inert-gas matrices, which we believe were probably more concentrated than ours, ShakhsEmampour et al 15 conclude that there is no measurable Jahn-Teller effect of the matrix on the ground state of the atom. They conclude further that the Fe atom in Ar exists in two major sites, which they speculate to be substitutional sites in the bulk and surface sites on the microcrystallites of their matrix deposits.…”