[skip navigation] NIST Physics Laboratory home page go to NIST home page NIST Physics Laboratory home page Products and Services Physical Reference Data Research Areas / Divisions Contact us Search the Physics Laboratory webspace
Special Publications
Periodic Table of the Elements
A periodic table of the elements, displaying NIST critically-evaluated data on the atomic properties of the elements. Suitable for high-resolution color printing for desk or wall-chart display.
Optical Radiation Measurement
A National Measurement System for Radiometry, Photometry, and Pyrometry Based upon Absolute Detectors. The history of electrical substitution radiometers at NIST is briefly reviewed and the implementation of the latest generation absolute cryogenic radiometer is discussed. It is proposed that NIST customers consider adopting the suggestions made in this technical note to simplify and improve their optical radiation based calibrations.

Diatomic Calculations: Equations & Theory
Procedures are described, in this pedagogical monograph, for making quantum mechanical calculations of rotational energy levels and rotational line intensities in diatomic molecules.

Methane Symmetry Operations
Catalog of explicit symmetry operations for the vibrational, rotational and nuclear spin functions of methane, and the use of these operations in determining symmetry laels and selection rules.

More publications on optical technology

Polarized Light Scattering Models
A C++ object class library (SCATMECH) has been developed to distribute models for polarized light scattering from surfaces. It is the intent of this library to allow researchers in the light-scattering community to fully utilize the models described in several NIST publications.

Atomic Spectroscopy
This article outlines the main concepts of atomic structure, with some emphasis on terminology and notation. Atomic radiation is discussed, and updated tabulations of ionization energies for the neutral atoms and transition probabilities for persistent lines of selected neutral atoms are included.

Bose-Einstein Condensation
Special issue (July-August 1996) of the Journal of Research of the National Institute of Standards and Technology dedicated to reporting recent developments in Bose-Einstein condensation and related issues such as ultracold atomic collision physics.
Searchable Bibliography
NIST Physics Laboratory Staff Publications (1991 to present)
Technical Activities
The most recent Technical Activities report summarizing research projects, measurement method developments, calibration and testing services, and data evaluation activities that were carried out in the Physics Laboratory.
Constants, Units, & Uncertainty
Fundamental physical constants. Article on CODATA values, and introduction to constants for nonexperts.

See also: Chart with selected values of the 2002 CODATA Recommended Values of the Fundamental Physical Constants - SP961 PDF (50 kB)

International System of Units. Publications on SI units, usage, history, and legal rulings:
SP811 HTML or PDF (413 kB)
SP330 HTML Table of Contents and PDF
Guide to the SI, with a legal focus - (Federal Register) PDF (2.3 MB)
SP447 HTML Table of Contents and PDF

Measurement uncertainty. Guidelines for expressing uncertainty:
TN1297 HTML or PDF (136 kB)
A Walk Through Time: Descriptive look at the history of timekeeping from ancient to modern methods, with a brief introduction to NIST Time and Frequency Services.

From Sundials to Atomic Clocks: Understanding Time and Frequency (PDF 26 MB, 306 pages) This full-length book provides a comprehensive, easy-to-understand introduction to the field of time and frequency.

FAQ   and   Glossary of Frequency and Timing.

Technical publications on time and frequency  

NIST: National Institute of Standards and TechnologyNIST Physics Laboratory Home Inquiries or comments: Feedback.
Online: June 1994   -   Last update: April 2008