No abstract

No abstract

The absorption spectrum of the H2 molecule has been studied in the wavelength region 840 to 930 Å with a 6.8 m grazing incidence vacuum spectrograph in combination with the helium continuum. All the possible levels, which lie below the dissociation limit H(12Sg)+H(22Sg,22Pu), of the odd singlet states have been identified in the present investigation. There are strong heterogeneous perturbations between the B′ and the D states, weak heterogeneous perturbations between the B′ and D′ states and a medium strength homogeneous perturbation between the B′ and the B″ states. The perturbation parameters have been estimated in each case. In the present paper, the results of the rotational and vibrational analyses are given for the B′—X, B″—X, D—X, and D′—X bands. The experimental evidence found in the present study suggests that the predissociation in the levels with v≥3 of the D state is of the type b0, according to Mulliken's classification.

A method has been developed for analysis of a series of ellipsometric data taken in situ during deposition. With this method the optical constants n and k and thickness d of growing ion-beam-sputtered films of C, Si, Ni, Nb, Mo, Ru, Rh, Pd, Ag, W, Re, and Au have been determined as a function of deposition time t. The minimum critical thickness d(i) needed for a film to become optically isotropic has been determined from the n, k, d-versus-t curves. Anomalous behavior of these curves appears in the region d less, similar d(c) resulting from a breakdown of the isotropic film model employed. This is shown, by transmission electron micrographs, to have a correlation with a transition region from island/anisotropic to continuous/isotropic.

No abstract