Relativistic Many-Body Bound Systems (open access)

Relativistic Many-Body Bound Systems

Report containing "[t]he principles and the mathematical details of a fully relativistic nuclear theory" (p. v). Appendix begins on page 124.
Date: 1975
Creator: Danos, Michael & Gillet, Vincent
System: The UNT Digital Library
Analysis of Optically Excited Mercury Molecules (open access)

Analysis of Optically Excited Mercury Molecules

Report presenting new measurement techniques used to obtain potential curves, f-values, and kinetic behavior for Hg2. The Hg2 molecule is representative of a class of molecules which have dissociative ground states and bound excited states. It can therefore be used as a prototype of this class of molecules which are of interest as potential new laser candidates. Because of the non-bound ground state, standard absorption spectroscopic techniques cannot be used to obtain the necessary information about the excited states.
Date: January 1975
Creator: Drullinger, R. E.; Hessel, M. M. & Smith, E. W.
System: The UNT Digital Library
The Role of Standard Reference Materials in Measurement Systems (open access)

The Role of Standard Reference Materials in Measurement Systems

Report is a guide to Standard Reference Materials (SRM's) and should be useful to all users of SRM's particularly those in countries developing national measurement systems. It is not intended to be an exhaustive description of the NBS-SRM program, but rather a review of the role SRM's play in the measurement system, how SRM's are certified, and what the certification means. To illustrate the use of SRM's, several selected industries are described in which SRM's have made significant contributions.
Date: January 1975
Creator: Cali, J. P.; Mears, T. W.; Michaelis, R. E.; Reed, W. P.; Seward, R. W.; Stanley, C., L. et al.
System: The UNT Digital Library
A Gage Block Measurement Process Using Single Wavelength Interferometry (open access)

A Gage Block Measurement Process Using Single Wavelength Interferometry

Report describing the interferometric measurement process using a laser light source and a Kosters type gage block interferometer. Continuous evaluation and refinement of the process is aided by statistical treatment and control chart techniques. All error sources, both random and systematic, are evaluated and the process is maintained in a state of statistical control.
Date: December 1975
Creator: Beers, John S.
System: The UNT Digital Library
Interactions of High Energy Particles With Nuclei (open access)

Interactions of High Energy Particles With Nuclei

Report discussing elastic scattering and diffractive production processes induced in nuclear targets by high energy projectiles. Special attention is paid to the interaction of high energy hadrons and photons. The common features of all these processes are emphasized throughout the article: The multiple scattering and shadowing processes inside of the target nuclei. An effort is made to develop a unified way of treating nuclear interactions of particles which are either hadrons or exhibit some hadronic components in such interactions.
Date: September 1975
Creator: Czyz, Wieslaw
System: The UNT Digital Library
Thermocouple Reference Tables Based on the IPTS-68: Reference Tables in Degrees Fahrenheit for Thermoelements versus Platinum (Pt-67) (open access)

Thermocouple Reference Tables Based on the IPTS-68: Reference Tables in Degrees Fahrenheit for Thermoelements versus Platinum (Pt-67)

Report presenting tables as a supplement to those given in NBS Monograph 125. Tables were calculated from the power series expansions presented in that Monograph. They are based upon the absolute electrical units and the International Practical Temperature Scale of 1968 (IPTS-68). Reference tables for several thermoelements versus platinum (Pt-67) are given with values of the thermoelectric voltage as a function of temperature in degrees Fahrenheit. Only tables for standard letter-designated thermoelements are included.
Date: March 1975
Creator: Powell, Robert L. & Burns, George W.
System: The UNT Digital Library
Tables of Spectral-Line Intensities: Part 1, Arranged by Elements (open access)

Tables of Spectral-Line Intensities: Part 1, Arranged by Elements

From Abstract: "Comparisons with other other intensity measurements in individual spectra indicate that the National Bureau of Standards spectral-line intensities may have average errors of 20 percent, but first of all they provide uniform quantitative values for the seventy chemical elements commonly determined by spectrochemists. These data are presented by element in part I, and all 39000 observed lines are given in order of wavelength in part II."
Date: May 1975
Creator: Meggers, William F.; Corliss, Charles H. & Scribner, Bourdon F.
System: The UNT Digital Library
Tables of Spectral-Line Intensities: Part 2 - Arranged by Wavelengths (open access)

Tables of Spectral-Line Intensities: Part 2 - Arranged by Wavelengths

From Preface: "This new edition of the NBS Tables of Spectral-Line Intensities incorporates three improvements on the original edition of 1961. In the original edition only about 25 000 of the 39 000 lines in the tables had been classified. In the ensuing thirteen years, about 8500 more lines (chiefly rare-earths) have been classified and the new classifications are here incorporated."
Date: May 1975
Creator: Meggers, William F.; Corliss, Charles H. & Scribner, Bourdon F.
System: The UNT Digital Library
Measurement Assurance Program - A Case Study: Length Measurements. Part 1. Long Gage Blocks (5 in to 20 in) (open access)

Measurement Assurance Program - A Case Study: Length Measurements. Part 1. Long Gage Blocks (5 in to 20 in)

From Abstract and Introduction: "This paper is, in essence, a report on the extension of the techniques first suggested in NBS Monograph 103 "Realistic Uncertainties and the Mass Measurement Process" to the area of length measurement. This paper covers the progress to date on the long gage blocks (from 5 to 20 in the length). The purpose of this purpose is to verify the closure between the "old" process and the "new" process, and to describe the present "points of departure" upon which some of the current assigned length values are based."
Date: November 1975
Creator: Pontius, Paul E.
System: The UNT Digital Library
The Rotary-Vane Attenuator as an Interlaboratory Standard (open access)

The Rotary-Vane Attenuator as an Interlaboratory Standard

From Abstract: "This paper presents a comprehensive report on the measurement and the use of rotary-vane attenuator as an interlaboratory standard."
Date: November 1975
Creator: Larson, Wilbur
System: The UNT Digital Library
Standard X-ray Diffraction Powder Patterns: Section 12. Data for 57 Substances (open access)

Standard X-ray Diffraction Powder Patterns: Section 12. Data for 57 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: February 1975
Creator: McMurdie, Howard F.; Morris, Marlene C.; Evans, Eloise H.; Paretzkin, Boris; de Groot, Johan H.; Hubbard, Camden R. et al.
System: The UNT Digital Library