Index of content:
Volume 20, Issue 5, September 1991
20(1991); http://dx.doi.org/10.1063/1.555895View Description Hide Description
Wavelengths and their classification have been compiled for the spectra of the atom and all positive ions of aluminum (Z=13). The selections of data are based on the compilations of energy levels by Martin and Zalubas [1979, J. Phys. Chem. Ref. Data 8, 817–864], with some updating from the more recent literature. Wavelengths (or wavenumbers) calculated from the differences of the energy levels are given along with the observed values for all classified lines; these calculated wavelengths should in general be more accurate than the observed values wherever the two values differ significantly. Calculated wavelengths are also given for a number of lines that have not yet been observed, including some important forbidden transitions. The most complete data are given in separate tables for the different spectra. No limitation has been imposed on the wavelength range of the classified lines, except for the omission of x‐ray transitions in the neutral atom. Two finding lists are also included, one for Ali through Aliii and the other for Aliv through Alxiii.
20(1991); http://dx.doi.org/10.1063/1.555896View Description Hide Description
The energy levels of the krypton atom, in all stages of ionization for which experimental data are available, have been compiled. No data has yet been published for Kr XI through Kr XVIII. For H‐like krypton very accurate calculated level values are compiled. In all, data for 29 spectra are given. Experimental g‐factors are included for Kr I and Kr II. Calculated percentage compositions of levels are given for 12 ions. A value for the ionization energy of each ion, either experimental or theoretical, is included.
20(1991); http://dx.doi.org/10.1063/1.555897View Description Hide Description
A joint project by the authors has resulted in two new thermodynamic property formulations for oxygen. The fundamental equation explicit in Helmholtz energy by Schmidt and Wagner has been used for the calculation of the property tables presented here, and for comparisons of calculated properties to the experimental data. The formulation of Stewart and Jacobsen is used in this paper in comparisons of properties calculated by the two formulations. These comparisons provide the basis for independent assessment of the accuracy of the available data and calculated properties. The procedures used in determining the formulations by Wagner and Schmidt, and by Stewart and Jacobsen were published earlier. The fundamental equation is valid for thermodynamic properties of oxygen from the freezing line to 300 K at pressures to 80 MPa. A separate vapor pressure equation and equations for the saturated liquid and saturated vapor densities and the ideal gas heat capacity are included. Functions for calculating internal energy, enthalpy,entropy, isochoric heat capacity (C v ), isobaric heat capacity (C p ) and velocity of sound are also included. Tables of thermodynamic properties of oxygen are given within the range of validity of the fundamental equation. The fundamental equation reported here may be used to calculate densities with an uncertainty of 0.10 percent, heat capacities within 2.0 percent, and velocity of sound values within 1.0 percent. These uncertainty values are valid for the range outside of the critical region. Comparisons of calculated properties to experimental data are included to verify the accuracy of the formulation.
20(1991); http://dx.doi.org/10.1063/1.555894View Description Hide Description
As part of the activities of the International Association for the Properties of Water and Steam, all reliable sources of experimental data on the thermodynamic properties of ordinary (light) water and steam have been collected and converted to common temperature, pressure, volume, mass and heat scales. The data are grouped by state or phase: ideal‐gas properties;sublimation and melting curves; saturationproperties;properties of liquid water at ambient pressure; thermodynamic properties of the single‐phase state; and those of metastable states. In each category, a subdivision is made by property.Properties include the volume, enthalpy,heat capacities, sound velocity, internal energy and Joule‐Thomson and related coefficients. The total data collection contains approximately 16 000 data points and covers a century of experimental work at temperatures from 253 to 1273 K and pressures up to 1 GPa. This report characterizes the data and gives the literature references. The actual data collection is available in computerized form.