# ELECTRONIC STATES OF MATRIX-ISOLATED NI ATOMS: A MAGNETIC CIRCULAR AND LINEAR DICHROISM STUDY

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 Title: ELECTRONIC STATES OF MATRIX-ISOLATED NI ATOMS: A MAGNETIC CIRCULAR AND LINEAR DICHROISM STUDY Creators: Pyka, J.; Vala, Martin; Eyring, Marc; Rivoal, Jean-Claude; Grisolia, Christian Issue Date: 1985 Abstract: The absorption, magnetic circular dichroism (MCD) and magnetic linear dichroism (MLD) spectra of Ni atoms isolated in an argon matrix (4.2 K) have been measured. By utilizing the complementarity of the predicted MCD and MLD signals for transitions to states of different J values, together with the known gas phase positions and relative intensities, an assignment for all observed bands has been made. All bands in the region 360-270nm originate from atoms in sites whose ground state is $^{3}D_{3}$, whereas bands in the $\sim240-230nm$ region arise from atoms whose matrix ground state is $^{3}F_{4}$. Saturation studies (MLD and MCD) reveal an important quenching of the $^{3}D_{3}$ ground state angular momentum. Calculations including full ground state Zeeman and crystal field (octahedral) interactions provide an excellent fit to the observed curves. The crystal field splitting is much larger than heretofore suspected. URI: http://hdl.handle.net/1811/12225 Other Identifiers: 1985-TB-9