Ytterbium Hydride and Ytterbium Deuteride Molecules: ESR and Optical Spectroscopy in Argon Matrices at 4 Degrees K.

摘要

YbH and YbD molecules have been prepared by the reaction of Yb and H(D) atoms during the formation of an argon matrix at 4 K. Yb atom and YbH absorption and emission spectra were observed. The magnetic parameters of YbH were determined from the ESR spectrum of the (2)Sigma molecules (with Yb nuclear spin I = O and I = 1/2). The hyperfine parameters indicate that the spin density is less than 20% on the hydrogen and that the bonding is largely Yb(+)H(-). By comparison of experimental parameters with calculated Yb and Yb(+) data it is deduced that the unpaired electron occupies predominately the 6s(sigma) orbital on Yb+ with smaller contributions of 6p(sigma) (Yb+) and 1s(sigma)(H(-)).