Physics

The NIST Physics Program produces the most comprehensive set of reliable physical reference 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 5000 compounds. The WebBook also contains constants of diatomic molecules.

NIST has also produced several important compilations of molecular data.

The codes in the list below have the following meanings:

Physics Database
SRD 69 NIST Chemistry WebBook, Online, DG, *
SRD 64 NIST Elastic-Electron-Scattering Cross-Section Database, PC, DG, *
SRD 7 NIST Electron and Positron Stopping Powers of Materials, PC, DG, *
SRD 82 NIST Electron Effective-Attenuation-Length Database, PC, DG, *
SRD 71 NIST Electron Inelastic-Mean-Free-Path Database, PC, DG, *
SRD 105 Elemental Data Index, Online, DG, *
SRD 107 Electron-Impact Ionization Cross Section Database, Online, DG, *
SRD 108 Handbook of Basic Atomic Spectroscopic Data, Online, DG, *

SRD 160 FLYCHK Collisional-Radiative Code, Online, DG, *
SRD 158 SAHA Plasma Population Kinetics Database, Online, DG, *
SRD 159 NLTE4 Plasma Population Kinetics Database, Online, DG, *

Atomic Spectroscopic Data
SRD 113 Spectral Data for the Chandra X-ray Observatory, Online, DG, *
SRD 141 Atomic Reference Data for Electronic Structure Calculation, Online, DG, *
SRD 78 Atomic Spectra Database [Version 3.0], Online, DG, *
SRD 109 Atomic Spectral Line Broadening Bibliographic Database, Online, DG, *
SRD 110 Atomic Transition Probability Bibliographic Database, Online, DG, *
SRD 111 Ground Levels and Ionization Energies for the Neutral Atoms, Online, DG, *
SRD 112 Atlas of the Spectrum of Platinum/Neon Hollow-Cathode Lamp, Online, DG, *
SRD 128 X-Ray Transition Energies Database, Online, DG, *

Molecular Spectroscopic Data
SRD 114 Diatomic Spectral Database, Online, DG, *
SRD 115 Hydrocarbon Spectral Database, Online, DG, *
NIST Recommended Rest Frequencies for Observed Interstellar Molecular Microwave Transitions, Online, DG, *
SRD 117 Triatomic Spectral Database, Online, DG, *
SRD 118 Wavenumber Tables for Calibration of Infrared Spectrometers, Online, DG, *
SRD 119 Photoionization of CO2 (ARPES), Online, DG, *

Nuclear Physics
SRD 144 Atomic Weights & Isotopic Composition, Online, DG, *
SRD 120 Radionuclide Half-Life Measurements Online, DG, *

Physical Constants
SRD 121 Fundamental Physical Constants, Online, DG, *
SRD 122 International System of Units (SI), Online, DG, *
Guidelines for Evaluating and Expressing Measurement Uncertainty, Online, DG, *
Searchable Bibliography on the Constants, Online, DG, *

Radiation Dosimetry
SRD 124 Stopping-Power and Range Tables for Electrons, Protons, and Helium Ions, Online, DG, *

X-Ray and Gamma-Ray Data
SRD 125 Bibliography of Photon Total Cross Section, Online, DG, *
Note on x-ray attenuation databases*
SRD 8 XCOM: Photon Cross Sections Database, Online, DG, *
Tables of X-Ray Mass Attenuation Coefficients and Mass Energy Absorption Coefficients, Online, DG, *
X-Ray Form Factor, Attenuation and Scattering Tabulation, Online, DG, *
X-Ray Transition Energies Database, Online, DG, *
SRD 20 NIST X-ray Photoelectron Spectroscopy Database 3.5, Online, DG, *
SRD 20 NIST X-ray Photoelectron Spectroscopy Database 4.0, Online Subscription