Kenji Ishikawa, Tatsuo Ishijima, et al.
Japanese Journal of Applied Physics
The orange and green arc bands of CaO are shown to arise from Ca + centered (4p,3d)-4s transitions analogous to the CaF A 2Π-X 2Σ+ and B 2Σ +-X 2Σ+ systems. The tremendous complexity of these Ca+O- systems is a consequence of the sixfold degeneracy of the O- p-hole, as compared to the nondegenerate F-(1S). The 0, 0 and 1, 1 bands of a D,d 1.3Δ-a 3Π transition are recorded by intermodulation spectroscopy and assigned (vibration, rotation, absolute parity) by nonstandard techniques. The D 1Δ state is found to lie below the isoconfigurational d 3δ1 state and D∼d spin-orbit perturbation causes the d 3Δ state to become irregular [3Δ2>3Δ 1>3Δ3). Two perturbation effects provide the key to the orbital interpretation of the orange and green arc bands: lambda doubling in a 3Π indicates that a π 4σσ3Σ+ state lies 1500 cm-1 above a 3Π D, d 1.3Δ∼B 1Π perturbations suggest recurrence of this 1500 cm-1 interconfigurational splitting which is the O-pσ/pπ splitting induced by the Ca+ ligand. © 1982 American Institute of Physics.
Kenji Ishikawa, Tatsuo Ishijima, et al.
Japanese Journal of Applied Physics
Sandip Tiwari, Alyce Ginzberg, et al.
IEEE Electron Device Letters
Ronald F. Marks, Richard A. Gottscho, et al.
Physica Scripta
Gottlieb S. Oehrlein, Stephan M. Brandstadter, et al.
Journal of Vacuum Science and Technology B