Elevated temperature dependence of the anisotropic visible-to-ultraviolet dielectric function of monoclinic beta-Ga2O3

We report on the temperature dependence of the dielectric tensor elements of $n$-type conductive $\beta$-Ga$_2$O$_3$ from 22$^\circ$C-500$^\circ$C in the spectral range of 1.5~eV--6.4~eV. We present the temperature dependence of the excitonic and band-to-band transition energies and their eigenpolarization vector orientations. We utilize a Bose-Einstein analysis of the temperature dependence of the observed transition energies and reveal electron coupling with average phonon temperature in excellent agreement with the average over all longitudinal phonon plasmon coupled modes reported previously [M. Schubert~\textit{et al.}, Phys. Rev. B \textbf{93}, 125209 (2016)]. We also report a linear temperature dependence of the wavelength independent Cauchy expansion coefficient for the anisotropic below-band-gap monoclinic indices of refraction

Higher-order Stationary Phase Approximations in Semiclassical Scattering

Stationary phase approximations on differential cross section expansion for elastic particle scattering mechanic

Variation in Environmental Risk Perceptions and Information Sources among Three Communities in El Paso

The authors report the results of a pilot study of environmental risk and sources of environmental information in three socio-economically and culturally distinct communities in Texas

Interaction Energies for the H-H (sub 2) and H (sub 2) - H (sub 2) System

Interaction energies for the H-H (sub 2) and H (sub 2) - H (sub 2) systems have been obtained by a semi-empirical perfect-pairing procedure used previously. The results have been compared with interaction energies obtained from other sources and the agreement among the different curves is reasonably good. A brief discussion of the previous applications of this semi-empirical scheme to other systems is included

Interactions Between Oxygen and Nitrogen: O[Single Bond]N, O[Single Bond]N (sub 2), and O (sub 2)[Single Bond]N (sub 2)

Potential energy curves for 0-N interactions corresponding to the X (sup 2) II (sub t/2), X (sup 2) II (sub 3/2), A (sup 2) Eta (sup plus), B (sup 2) II, C (sup 2) II, D (sup 2) Eta (sup plus), E (sup 2) Eta (sup plus), and B prime (sup 2 delta) states of nitric oxide have been calculated from spectroscopic data by the Rydberg- Klein-Rees method. Curves for the (sup 4) II, (sup 2) Eta, (sup 4) Eta, (sup 6) Eta, and (sup 6) II states have been obtained from limited spectroscopic results and from relations derived from approximate quantum-mechanical calculations. Two semi-independent calculations have been made, and are in good agreement with each other. The quantum-mechanical relations also lead to approximate curves for the O[Single Bond]N, and O[Single Bond]N (sub 2) interactions over a limited range. The O (sub 2)[Single Bond]N (sub 2) interaction is consistent with one valid at larger separation distances which has been derived from high-temperature gas viscosity data

Potential Energy Curves for CO

Potential energy curves for the Chi (sup 1) Epsilon (sup plus), alpha (sup 3) II (sub r), alpha prime (sup 3) epsilon (sup plus), d (sup 3) delta, e (sup 3) Epsilon (sup minus), Alpha (sup 1) II, and Beta (sup 1) Epsilon (sup plus), electronic states of the CO molecule have been calculated by the Rydberg-Klein-Rees method. The curve for the A III state will have to bend sharply in the range between 1.9 and 2.1 angstroms or it will have to pass through a maximum to reach the proper dissociation limit

Potential Energy Curves of Hydrogen Fluoride

Potential energy curves for the X(sup 1)sigma+ and V(sup 1)sigma+ states of HF and DF have been calculated by the Rydberg-Klein-Rees method. The results calculated from the different sets of data for HF and DF are found to be in very good agreement. The theoretical results of Karo are compared to the experimental results obtained here

Interactions between Ground State Oxygen Atoms and Molecules: O - O and O (sub2) - O (sub2)

Potential energy curves for O - O interactions corresponding to the X (sup 3) Sigma - g, 1 delta g, 1 Sigma plus g, 3 delta u, A3 Sigma plus u, 1 Sigma - u, and B3 Sigma states of O (sub 2) have been calculated from spectroscopic data by the RydbergKleinRees method. Curves for the remaining twelve states of O (sub 2) dissociating to ground state atoms have been obtained from relations derived from approximate quantummechanical calculations, and checked against the meager experimental information available. Two semiindependent calculations have been made, and are in good agreement with each other. The quantummechanical relations also lead to an approximate O (sub 2) - O (sub 2) interaction, which is consistent with interactions derived from vibrational relaxation times and from hightemperature gas viscosity data