Volume 6, Issue 1, January 1977
Index of content:
6(1977); http://dx.doi.org/10.1063/1.555547View Description Hide Description
A survey, comparison, and critical analysis is presented of data compiled from the scientific literature concerning diffusion in copper alloy systems involving elements in Group VA (As, Bi, N, P, Sb). Here the term ’’copper alloy system’’ is interpreted in the broadcast sense. For example, the review of diffusion in the Cu‐M system reports all diffusion situations which involve both copper and element M, including diffusion of Cu in M or in any binary, ternary, or multicomponent alloy containing M; diffusion of M in Cu or in any alloy containing Cu; and diffusion of any element in any alloy containing both Cu and M. Topics include volume diffusion,grain boundarydiffusion, tracer diffusion, alloy interdiffusion,electromigration, thermomigration, strain‐enhanced diffusion and diffusion in molten metals. An extensive bibliography is presented along with figures, tabular presentation of data, and discussion of results.
6(1977); http://dx.doi.org/10.1063/1.555549View Description Hide Description
Comprehensive tables of the primary thermodynamic properties of superfluid helium‐4, such as the specific heat and entropy, are presented as computed from the Landau quasiparticle model, with the aid of inelastic neutron scattering data. The neutron data are presented by continuous functions of temperature pressure, and wave number and certain excitation properties such as number density, normal and superfluid densities are calculated directly from it. A discussion of the methods used in our computations is included, and comparisons of computed and experimental results are made where applicable. Certain inadequacies of present theoretical methods to describe the thermodynamic properties are reported, and the use of an effective spectrum is introduced to offset some of these difficulties. Considerable experimental effort is also needed to improve the present situation.
6(1977); http://dx.doi.org/10.1063/1.555545View Description Hide Description
Structural and spectroscopic data on CH3OH, CH3OD, CDOD were reviewed. The selected values were utilized to calculate the ideal gas thermodynamicproperties in the temperature range of 0 to 1500 K, using the rigid‐rotor and harmonic‐oscillator model. Experimental data for the standard enthalpy of formation at 298.15 K, the heat capacities, and the third‐law entropies at elevated temperatures are available only for CH3OH vapor phase where intermolecular association occurs. The agreement between the observed thermal data and our calculated values is satisfactory within the experimental uncertainties. Finally, the standard chemical thermodynamic values for ΔH f°, ΔG f°, and log K f were generated in the temperature range of 0 to 1500 K.
6(1977); http://dx.doi.org/10.1063/1.555546View Description Hide Description
This is a critical review and compilation of the observed and predicted spectroscopic data on the molecule N2 and its ions N 2 −, N2 +, N2 2+, and the molecule N3. Each electronic band system is discussed in detail, and tables of band origins and heads are given. In addition to the gas phase electronic, electron and Raman spectra, there are also examined the spectra of condensed molecular nitrogen as well as the pressure‐ and field‐induced infrared and microwave absorption. Dissociation energy of N2, predissociations, and perturbations are discussed. Potential energy curves are given, as well as radiative lifetimes, f‐values, and Franck‐Condon integrals. Molecular constants are listed for the known electronic states. Electronic structure and theoretical calculations are reviewed.
6(1977); http://dx.doi.org/10.1063/1.555548View Description Hide Description