Standard X-ray Diffraction Powder Patterns: Section 5. Data for 80 Substances (open access)

Standard X-ray Diffraction Powder Patterns: Section 5. Data for 80 Substances

Report documenting standard x-ray diffraction powder patterns for various compounds, intended to replace previous data or provide information for new substances. It describes the methods and, for each substance, outlines any previous data as well as information about the sample used and structural data, with a table of diffraction patterns.
Date: August 31, 1967
Creator: Swanson, H. E.; McMurdie, H. F.; Morris, M. C. & Evans, E. H.
System: The UNT Digital Library
Thermodynamic and Related Properties of Parahydrogen From the Triple Point to 100 K at Pressures to 340 Atmospheres (open access)

Thermodynamic and Related Properties of Parahydrogen From the Triple Point to 100 K at Pressures to 340 Atmospheres

From Introduction: "In the present report, therefore, polynomials representing isotherms and isochores are combined with numerical methods of computation for the purpose of improving accuracy, in particular for the derivatives of the P-p-T surface."
Date: August 10, 1965
Creator: Roder, H. M.; Weber, L. A. & Goodwin, R. D.
System: The UNT Digital Library
Tables of Electron Radial Functions and Tangents of Phase Shifts for Light Nuclei (Z=1 through 10) (open access)

Tables of Electron Radial Functions and Tangents of Phase Shifts for Light Nuclei (Z=1 through 10)

From Introduction: "This Monograph, supplemented by ORNL-3207 [9], should eliminate completely the need for use of approximate formulas (e.g. those of Kotani and Ross [10]). The formulation of the problem has been summarized in sec. II. This is followed in sec. III by a discussion of the methods used in numerical calculations. Sec. IV contains a detailed explanation to facilitate the use of present tables."
Date: August 6, 1964
Creator: Bhalla, C. P.
System: The UNT Digital Library
Line Parameters and Computed Spectra for Water Vapor Bands at 2.7 mu (open access)

Line Parameters and Computed Spectra for Water Vapor Bands at 2.7 mu

From Foreword: "This Monograph is one of a series intended to provide fundamental information required for the estimation and interpretation of atmospheric transmittance at infrared frequencies. Part I of this Monograph presents the fundamental properties of the 2.7m water vapor band in terms of line absorptions and the integrated transmittance at any frequency for infinite resolution. Part II presents examples of the "degraded" transmittance for finite resolution, as a function of the spectral slit width, concentration, and pressure with which direct observations may be compared."
Date: August 3, 1964
Creator: Gates, David M.; Calfee, Robert F.; Hansen, David W. & Benedict, W. S.
System: The UNT Digital Library
Electron Optical Studies of Low-Pressure Gases (open access)

Electron Optical Studies of Low-Pressure Gases

From Abstract: "This document is the final report of research carried on in the Electron Physics Section of the National Bureau of Standards during the period from February 1, 1955 to March 1962 in developing an electron optical method for the visualization of low-pressure gas flow."
Date: August 16, 1963
Creator: Marton, L.; Schubert, David C. & Mielczarek, S. R.
System: The UNT Digital Library
Realistic Uncertainties and the Mass Measurement Process: An Illustrated Review (open access)

Realistic Uncertainties and the Mass Measurement Process: An Illustrated Review

From Abstract: "This paper gives a review of the concepts and operations involved in measuring the mass of an object. The importance of viewing measurement as a production process is emphasized and methods of evaluating process parameters are presented."
Date: August 15, 1967
Creator: Pontius, P. E. & Cameron, J. M.
System: The UNT Digital Library
Stabilization of Free Radicals at Low Temperatures: Summary of the NBS Program (open access)

Stabilization of Free Radicals at Low Temperatures: Summary of the NBS Program

From Forward: "Although the first paper in this volume describes the general aspects of the technical management of the program, it is important to emphasize that much of success and productivity of this program stemmed from the sympathetic understanding of its basic viewpoint by both the Department of Defense and the National Bureau of Standards."
Date: August 1, 1960
Creator: Bass, Arnold M. & Broida, H. P.
System: The UNT Digital Library
Systems of Electrical Units (open access)

Systems of Electrical Units

Report issued by the U.S. National Bureau of Standards discussing different systems of electrical units. As stated in the introduction, "the various systems of measurement, with their respective sets of units, used in the literature on electricity and magnetism are described in detail" (p. 1). This report includes tables.
Date: August 1963
Creator: Silsbee, Francis B.
System: The UNT Digital Library
Effects of Finite Lattice Heat Capacity on Spin Lattice Relaxation: Theory and Numerical Analysis (open access)

Effects of Finite Lattice Heat Capacity on Spin Lattice Relaxation: Theory and Numerical Analysis

Report discussing the transient magnetic behavior of a paramagnetic substance, after an initial disturbance, considered theoretically for a variety of situations in which the lattice temperature rises as a result of energy flow from the magnetic (electron spin) system. Next, the opposite extreme is considered - that in which the resonant and remaining modes are totally uncoupled. Finally, there is a consideration of the case of spins coupled only to the resonant phonons, which in turn are coupled to a constant temperature bath, whether this be the helium or the remaining modes.
Date: August 1, 1967
Creator: Peterson, Robert L.
System: The UNT Digital Library
Bibliography on Atomic Transition Probabilities (open access)

Bibliography on Atomic Transition Probabilities

Report presenting a bibliography on atomic transition probabilities. The papers are arranged according to elements and stages of ionization, and the method employed and class of transitions are indicated behind each reference. Only articles on discrete transitions, both permitted and forbidden, are listed. Also included is a supplementary list of papers dealing with transition probabilities from a general point of view, a table showing the availability of numerical material on the individual atoms and ions, and a table of conversion factors.
Date: August 1, 1962
Creator: Glennon, B. M. & Wiese, W. L.
System: The UNT Digital Library
Microwave Impedance Measurements and Standards (open access)

Microwave Impedance Measurements and Standards

Report presenting a survey and discussion of well-known microwave impedance measurement techniques. The discussion includes an introduction which emphasizes basic concepts and reflection coefficient-voltage standing-wave ratio relationships. Sources of error in the various measurement techniques are discussed and methods to reduce errors are presented. Methods using rotating loops and resonance lines are included and a brief discussion of microwave impedance standards is given.
Date: August 12, 1965
Creator: Beatty, Robert W.
System: The UNT Digital Library
Acid-Base Behavior in Aprotic Organica Solvents (open access)

Acid-Base Behavior in Aprotic Organica Solvents

Report presenting the National Bureau of Standards' research program designed to determine and explain acid-base behavior in aprotic organic solvents and to develop methods and reference materials for determining total acid and base content and relative strengths of acids and bases in the media.
Date: August 1968
Creator: Davis, Marion Maclean
System: The UNT Digital Library