Online
Scientific Databases
AnthroKids
- Anthropometric Data of Children displays the results of two studies
on anthropometric data of children.
Atlas
of the Spectrum of a Platinum/Neon Hollow-Cathode Lamp in the Region
1130-4330 Å contains wavelengths and intensities for about
5600 lines in the region 4330 Å. An atlas plot of the spectrum
is given, with the spectral lines marked and their intensities, wavelengths,
and classifications listed.
Atomic
Energy Levels and Wavelengths
References contained in this
database are from Bibliography on Atomic Energy Levels and Spectra,
NBS Special Publication 363 and Supplements, as well as current references
since the last published bibliography collected by the NIST Atomic Spectroscopy
Data Center. These references pertain to atomic structure and spectra
that arise from interactions or excitations involving electrons in the
outer shells of free atoms and atomic ions, or from inner shell excitations
corresponding to frequencies up to the soft x-ray range.
Periodic
Table: Atomic Properties of the Elements A periodic table, containing
NIST critically-evaluated data on atomic properties of the elements
[SP 966] was designed as a NIST handout for use at exhibitions and trade
shows. The publication of the handout coincided with NIST's centennial
celebration in 2001. One side of the handout (shown below) is available
online in two formats (PDF & TIFF), and is suitable for high-resolution
color printing for desk or wall-chart display. [The other side of the
handout (not available online) contains historical information.]
Atomic
Reference Data for Electronic Structure Calculations contains total
energies and orbital eigenvalues for the atoms hydrogen through uranium,
as computed in several standard variants of density-functional theory.
The NIST Atomic
Spectra Database (ASD) contains data for radiative transitions and
energy levels in atoms and atomic ions. Data are included for observed
transitions of 99 elements and energy levels of 52 elements. ASD contains
data on about 900 spectra from about 1 Å (Ångströms) to 200 µm (micrometers),
with about 70,000 energy levels and 91,000 lines, 40,000 of which have
transition probabilities listed. The most current NIST-evaluated data
associated with each transition are integrated under a single listing.
Atomic
Spectral Line Broadening Bibliographic Database contains approximately
800 recent references, all collected after the last published bibliography.
The database contains number data, general information, comments, and
review articles.
Atomic
Transition Probability Bibliographic Database provides 6,113 references
from 1914 through 1999. These papers contain numerical data, comments
and review articles on atomic transition probabilities (oscillator strengths,
line strengths, or radiactive lifetimes).
Atomic
Weights and Isotopic Compositions the atomic weights are available
for elements 1 through 111, and isotopic compositions or abundances
are given when appropriate.
Bibliography
of Photon Total Cross Section (Attenuation Coefficient) Measurements
includes papers reporting absolute measurements of photon (XUV, x-ray,
gamma-ray, bremsstrahlung) total interaction cross sections or attenuation
coefficients for the elements and some compounds.
NIST
Biofuel Database brings together structural, biological, and thermodynamic
data for enzymes that are either in current use or are being considered
for use in the production of biofuels.
The Biological
Macromolecule Crystallization Database and NASA Archive for Protein
Crystal Growth Data (BMCD) contains the conditions reported for the
crystallization of proteins and nucleic acids used in X-ray structure
determinations and archives the results of microgravity macromolecule
crystallization studies.
The Ceramics
WebBook is an gateway to evaluated data, a guide to data centers
and sources and a repository for tools and resources for ceramics.
The NIST Chemical
Kinetics Database includes essentially all reported kinetics results
for thermal gas-phase chemical reactions. The database is designed to
be searched for kinetics data based on the specific reactants involved,
for reactions resulting in specified products, for all the reactions
of a particular species, or for various combinations of these. In addition,
the bibliography can be searched by author name or combination of names.
The database contains in excess of 38,000 separate reaction records
for over 11,700 distinct reactant pairs. These data have been abstracted
from over 12,000 papers with literature coverage through early 2000.
The NIST Chemistry
WebBook, sixth edition contains thermochemical data for over 6500
organic and small inorganic compounds, reaction thermochemistry data
for over 9800 reactions, IR spectra for over 8700 compounds, mass spectra
for over 12,600 compounds, UV/Vis spectra for over 400 compounds, electronic
/ vibrational spectra for over 4100 compounds, constants of diatomic
molecules (spectroscopic data) for over 600 compounds, ion energetics
data for over 16,000 compounds, and thermophysical property data for
33 fluids. There are many avenues for searching the database.
CIS2
Visual Interoperability Testbed translates a CIS2 file (CIMsteel
Integrations Standards) of a steel structure into a 3D interactive model
in the form of a VRML (Virtual Reality Modeling Language) file. The
translator is part of the research in developing a mapping between VRML
prototypes and CIS2.
CKMech
Chemical Kinetics Mechanisms was developed to make available data in
a report entitled Thermochemical and Chemical Kinetic Data for Fluorinated
Hydrocarbons.
The NIST Computational
Chemistry Comparison and Benchmark Database is a collection of experimental
and ab initio thermochemical properties for a selected set of molecules.
Users are provide a benchmark set of molecules for the evaluation of
ab initio computational methods and allow the comparison between different
ab initio computational methods for the prediction of thermochemical
properties.
Dictionary
of Algorithms and Data Structures is a dictionary of algorithms,
algorithmic techniques, data structures, archetypical problems, and
related definitions. Some entries have links to further information
and implementations.
Electron
Interactions with Plasma Processing Gases has data excerpted from
recently published articles in the Journal of Physical and Chemical
Reference Data (JPCRD). Presented here are collision cross section data
and electron transport coefficients for gases, such as CF4
and CHF3, used in the manufacturing of semiconductor devices.
The Elemental
Data Index provides access to the holdings of the NIST Physics Laboratory
online data organized by element. It is intended to simplify the process
of retrieving online scientific data for a specific element.
Engineering
Statistics Handbook details numerous methods to help scientists
and engineers incorporate statistical methods in their work.
Fire
Research Information Services (FRIS) is a resource for fire protection
engineers, scientists, and fire service personal. It includes FIREDOC
which is a complete fire research bibliographic database with 55,000
holdings (published reports, journal articles, conference proceedings,
books, and audiovisual items) of FRIS. Each reference has complete bibliographic
information.
FLYCHK Collisional-Radiative
Code FLYCHK provides a capability to generate atomic level populations
and charge state distributions for low-Z to mid-Z elements under NLTE
conditions.
Frequencies
for Interstellar Molecular Microwave Transitions presents critically
evaluated transition frequencies for the molecular transitions detected
in interstellar and circumstellar clouds.
CODATA
Fundamental Physical Constants, developed in the Physics Laboratory
at NIST, addresses three topics: fundamental physical constants, the
International System of Units (SI), which is the modern metric system,
and expressing the uncertainty of measurement results.
Fundamental
Physical Constants - International System of Units (SI) lists important
definitions related to the modern metric system of measurement.
Fundamental
Physical Constants - Searchable Bibliography on the Constants contains
citations for the most important theoretical and experimental publications
relevant to the fundamental constants and closely related precision
measurements published since the mid 1980s.
Ground
Levels and Ionization Energies for the Neutral Atoms provides data
for ground state electron configurations and ionization energies for
the neutral atoms (Z = 1-104) including references.
The Guide
to Available Mathematical Software studies techniques to provide
scientists and engineers with improved access to reusable computer software
components which are available to them for use in mathematical modeling
and statistical analysis. It provides centralized access to such items
as abstracts, documentation, and source code of software modules that
it catalogs.
Guidelines
for Evaluating and Expressing the Uncertainty of NIST Measurement Results
presents a method of evaluating and expressing uncertainty in measurement
adapted from NIST Technical Note 1297.
NIST
Heat Transmission Properties of Insulating and Building Materials
provides a valuable reference for building designers, material manufacturers,
and researchers in the thermal design of building components and equipment.
NIST has accumulated a valuable and comprehensive collection of thermal
conductivity data from measurements performed with a 200-mm square guarded-hot-plate
apparatus (from 1933 to 1983).
NIST
High Temperature Superconducting Materials Database provides evaluated
thermal, mechanical, and superconducting property data for oxides and
other nonconventional superconductors.
NIST Interactive
Algorithm for Isotopic CO2 Measurements is a web-based tool for
converting carbon dioxide isotope measurements into standardized delta
13-C and delta-18-O values.
The International
Comparisons Database provides information on Appendices B and D
of the Comité International des Poid et Mesures (CIPM) Mutual
Recognition Arrangement (MRA). The official source of the data is the
BIPM key comparison database. The ICDB provides access to results of
comparisons of measurements and standards organized by the consultative
committees of the CIPM and the Regional Metrology Organizations.
The NIST
ITS-90 Thermocouple Database contains the most commonly used tables
of NIST Monograph 175, "Temperature-Electromotive Force Reference Functions
and Tables for the Letter-Designated Thermocouple Types Based on the
ITS-90," by Burns, Kaeser (formerly Scroger), Strouse, Croarkin, and
Guthrie. These reference functions have been adopted as standards by
the American Society for Testing and Materials and the International
Electrotechnical Commission.
The Matrix
Market Database is a visual repository of test data for use in comparative
studies of algorithms for numerical linear algebra, featuring nearly
500 sparse matrices from a variety of applications, as well as matrix
generation tools and services.
NLTE4 Plasma Population Kinetics
Database Welcome to the NIST NLTE-4 Plasma Kinetics Modeling Database!
This database contains benchmark results for simulation of plasma population
kinetics and emission spectra. The data were contributed by the participants
of the 4th Non-LTE Code Comparison Workshop who have unrestricted access
to the database. The only limitation for other users is in hidden labeling
of the output results. Guest users can proceed to the database entry
page without entering userid and password.
Phase
Diagrams and Computational Thermodynamics - Solder Systems predicts
melting temperatures and freezing ranges of lead-free solders which
are used to remove lead-containing components from commercial products.
This database also shows the effects of non-equilibrium solidification.
Also included is a collection of calculated binary and ternary systems
that are relevant to solders.
Polycyclic
Aromatic Hydrocarbon Structure Index, NIST Special Publication 922,
is presented by the Chemical Science and Technology Laboratory as an
aid in the identification of the chemical structures and nomenclature
of 660 common (and not so common) polycyclic aromatic hydrocarbons (PAHs).
NIST Property
Data Summaries for Advanced Materials are topical collections of
property values derived from surveys of published data. Thermal, mechanical,
structural, and chemical properties are included in the collections.
The Protein
Data Bank PDB is the single worldwide repository for the processing
and distribution of 3-D biological macromolecular structure data.
It is currently
managed by a collaboration of - Rutgers University, Univ. of California
- San Diego and NIST.
Radionuclide
Half-Life Measurements presents the half-lives of many radionuclides
measured at NIST. Revised values for the half lives of various "short-lived"
radionuclides arise from improved impurity analysis, incorporation of
additional data from new sources, and reevaluation of old data.
NIST
Recommended Rest Frequencies for Observed Interstellar Molecular Microwave
Transitions -1991 Revision provides critically evaluated transition
frequencies for the molecular transitions detected in interstellar and
circumstellar clouds. The tabulated transitions are recommended for
reference in future astronomical observations in the microwave and millimeter
wavelength regions.
SAHA Plasma Population
Kinetics Database Welcome to the NIST Saha Plasma Kinetics Modeling
Database. This database contains benchmark results for simulation of
plasma population kinetics and emission spectra. The data were contributed
by the participants of the 3rd Non-LTE Code Comparison Workshop who
have unrestricted access to the database. The only limitation for other
users is in hidden labeling of the output results. Guest users can proceed
to the database entry page without entering userid and password.
Short
Tandem Repeat DNA Internet Database is intended to benefit research
and application of short tandem repeat DNA markers for human identity
testing. Facts and sequence information on each STR system, population
data, commonly used multiplex STR systems, PCR primers and conditions
and a review of various technologies for analysis of STR alleles have
been included.
The Statistical
Reference Datasets is also supported by the Standard Reference Data
Program. The purpose of this project is to improve the accuracy of statistical
software by providing reference datasets with certified computational
results that enable the objective evaluation of statistical software.
Stopping-Power
and Range Tables for Electrons, Protons & Helium Ions The databases
ESTAR, PSTAR, and ASTAR calculate stopping-power and range tables for
electrons, protons, or helium ions, according to methods described in
ICRU Reports 37 and 49. Stopping-power and range tables can be calculated
for electrons in any user-specified material and for protons and helium
ions in 74 materials.
NIST Structural
Ceramics Database (WebSCD) provides evaluated materials property
data for a wide range of advanced ceramics known variously as structural
ceramics, engineering ceramics, and fine ceramics.
Tables
of X-Ray Mass Attenuation Coefficients and Mass Energy - Absorption
Coefficients from 1keV to 20 MeV for Elements Z = 1 to 92 and 48 Additional
Substances of Dosimetric Interest include tables covering energies
of the photon (x-ray, gamma ray, bremsstrahlung) from 1 keV to 20 MeV.
Thermodynamics
of Enzyme-Catalyzed Reactions Database contains thermodynamic data
on enzyme-catalyzed reactions that have been recently published in the
Journal of Physical and Chemical Reference Data (JPCRD). For each reaction
the following information is provided: the reference for the data, the
reaction studied, the name of the enzyme used and its Enzyme Commission
number, the method of measurement, the data and an evaluation thereof.
The Database of
the Thermophysical
Properties of Gases Used in the Semiconductor Industry concerns
transport and thermodynamic property data for the gases used in semiconductor
processing. The data are useful for equipment modeling in chemical vapor
deposition (CVD) processes and the data will also provide a rational
basis for the calibration of mass flow controllers (MRCs) used to meter
process gases.
The NIST
Visible Cement Dataset consists of data on cement pastes with ratios
between 0.3 and 0.45 that were prepared and viewed after various hydration
times.
Wavenumber
Calibration Tables from Heterodyne Frequency Measurements contains
the bibliography and atlas as updated through November 1994. The atlas
and wavenumber tables consist of many pages of spectral maps accompanied
by tables of transition wavenumbers and their identity.
XCOM:
Photon Cross Sections Database can be used to calculate photon cross
sections for scattering, photoelectric absorption and pair production,
as well as total attenuation coefficients, for any element, compound
or mixture (Z <= 100) at energies from 1 keV to 100 GeV.
X-Ray
Attenuation and Absorption for Materials of Dosimetic Interest Tables
and graphs of the photon mass attenuation coefficient and the mass energy-absorption
coefficient are presented for all of the elements Z = 1 to 92, and for
48 compounds and mixtures of radiological interest. The tables cover
energies of the photon (x-ray, gamma ray, bremsstrahlung) from 1 keV
to 20 MeV.
X-Ray
Form Factor, Attenuation and Scattering Tables this database collects
tables and graphs of the form factors, the photoabsorption cross section,
and the total attenuation coefficient for any element (Z <=92).
The NIST
X-ray Photoelectron Spectroscopy (XPS) Database gives easy access
to the energies of many photoelectron and Auger-electron spectral lines.
Resulting from a critical evaluation of the published literature, the
database contains over 19,000 line positions, chemical shifts, doublet
splittings, and energy separations of photoelectron and Auger-electron
lines. A highly interactive program allows the user to search by element,
line type, line energy, and many other variables.