Analytical Chemistry

Atomic and Molecular Physics

Biometrics

Biotechnology

Chemical and Crystal Structure

Chemical Kinetics

Chemistry

Communications

Construction

Environmental Data

Fire

Fluids

International Trade

Law Enforcement

Materials Properties

Mathematical Databases, Software and Tools

Optical Character Recognition

Physics

Product Design

Surface Data

Text and Video Retrieval

Thermophysical and Thermochemical

Atomic and Molecular Physics

The NIST Standard Reference Data Group has worked together with the world-famous NIST Atomic Physics Program to produce the most comprehensive set of reliable atomic data available anywhere.

The NIST collection of atomic energy levels, transition probabilities, and collision data is widely used by groups for characterizing and modeling all types of gaseous systems, including plasmas, planetary atmospheres, and astrophysical media, and for health physics applications. Databases and publications make these data easy to find and easy to use. The physics online databases have grown into an extensive listing. The NIST Chemistry WebBook now contains electronic and vibrational spectra for over 4000 compounds. The WebBook also contains constants of diatomic molecules.

The SRD Group has also produced several important compilations of molecular data.

Atomic and Molecular Physics Databases

Physical Constants

Atomic Spectroscopic Data

Molecular Spectroscopic Data

X-Ray and Gamma-Ray Data    Note on x-ray attenuation databases