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NeXLCore.jl - A library of basic physics for atomic X-ray processes in the Julia language

Data provided by  National Institute of Standards and Technology

NeXLCore.jl represents the basic physics related data and algorithms necessary to interpret and understand X-ray emission.

Tags: x-ray,physics,Energy,mass absorption,Ionization,bremsstrahlung,characteristic,

Modified: 2022-07-29

Views: 0

NIST Computational Chemistry Comparison and Benchmark Database - SRD 101

Data provided by  National Institute of Standards and Technology

The NIST Computational Chemistry Comparison and Benchmark Database is a collection of experimental and ab initio thermochemical properties for a selected set of gas-phase molecules. The goals are to provide a benchmark set of experimental data for the evaluation of ab initio computational methods and allow the comparison between different ab initio computational methods for the prediction of gas-phase thermochemical properties. The data files linked to this record are a subset of the experimental data present in the CCCBDB.

Tags: ab initio,atomization enthalpy,basis functions,benchmark data,benchmarks,bond angle,bond length,cccbdb,chemistry,computational chemistry,dipole moment,electron affinity,hindered rotor,homo lumo gap,ideal gas,integrated heat capacity,isomerization enthalpies,molecular geometry,molecular polarizability,molecular vibrations,physics,point group,quantum chemistry,thermochemical data,thermochemistry,vibration frequencies,vibrational frequencies,vibrational frequency,vibrational zero point energy,zero-point energies,

Modified: 2022-07-29

Views: 0

NIST Electron-Impact Ionization Cross Section Database - SRD 107

Data provided by  National Institute of Standards and Technology

This is a database of total ionization cross sections of atoms and molecules by electron impact. The cross sections were calculated using the Binary-Encounter-Bethe (BEB) model, which combines the Mott cross section with the high-incident energy behavior of the Bethe cross section. Selected experimental data are included. Singly differential cross sections are included for H, He, and H2. Electron-impact excitation cross sections are also included for selected atoms.

Tags: BEB,Bethe,Binary Encounter Bethe,Mott,high T,high temperatures,ionizations,physics,

Modified: 2022-07-29

Views: 0

NIST Observed Interstellar Molecular Microwave Transitions Database - SRD 116

Data provided by  National Institute of Standards and Technology

This database contains critically evaluated transition frequencies for the molecular transitions detected in interstellar and circumstellar clouds reported in the literature through mid-2008. The tabulated transition frequencies are recommended for reference in future astronomical observations in the centimeter and millimeter wavelength regions. The transition frequencies have been selected through a critical examination and analysis of the laboratory spectral data obtained from the literature.

Tags: astronomy,atomic physics,circumstellar clouds,interstellar molecules,microwave spectroscopy,molecular clouds,molecular lines,physics,radio astronomy,rotational spectra,

Modified: 2022-07-29

Views: 0

NIST Photoionization of CO2 (ARPES) Database - SRD 119

Data provided by  National Institute of Standards and Technology

CO2 is studied using dispersed synchrotron radiation in the 650 Å and 840 Å spectral region. The vibrationally resolved photoelectron spectra are analyzed to generate relative vibrational transition amplitudes and the angular asymmetry parameters describing the various transitions observed.

Tags: ARPES,X ray photoelectron spectroscopy,photoelectron spectroscopy,physics,spectra,

Modified: 2022-07-29

Views: 0

NIST Stopping-Power & Range Tables for Electrons, Protons, and Helium Ions - SRD 124

Data provided by  National Institute of Standards and Technology

The databases ESTAR, PSTAR, and ASTAR calculate stopping-power and range tables for electrons, protons, or helium ions. Stopping-power and range tables can be calculated for electrons in any user-specified material and for protons and helium ions in 74 materials.

Tags: Barks correction,ICRUs,International Commission on Radiation Units and Measurements,air,alpha particles,atomic physics,block correction,bremsstrahlung,charged particles,collisions,electronic stopping powers,electrons,energies,nuclear physics,nuclear stopping powers,physics,projected ranges,

Modified: 2022-07-29

Views: 0

NIST X-Ray Transition Energies Database - SRD 128

Data provided by  National Institute of Standards and Technology

This X-ray transition table provides the energies and wavelengths for the K and L transitions connecting energy levels having principal quantum numbers n = 1, 2, 3, and 4. The elements covered include Z = 10, neon to Z = 100, fermium. There are two unique features of this database: (1) all experimental values are on a scale consistent with the International System of measurement (the SI) and the numerical values are determined using constants from the Recommended Values of the Fundamental Physical Constants: 1998 [115] and (2) accurate theoretical estimates are included for all transitions.

Tags: Bearden database,X ray wavelengths,X rays,Atomic Spectroscopy,measured transitions,physics,transition energies,

Modified: 2022-07-29

Views: 0

NIST Atomic Weights and Isotopic Compositions with Relative Atomic Masses

Data provided by  National Institute of Standards and Technology

The atomic weights are available for elements 1 through 118 and isotopic compositions or abundances are given when appropriate. Version 3.0.

Tags: Commission on Atomic Weights and Isotopic Abundances,International Union for Pure and Applied Chemistry,SIAM,atomic mass evaluation,Atomic Weights,Elemental Data,elements,mass spectrometry,measurements,physics,relative atomic masses,representative isotopic compositions,statistical evaluation of isotopic abundances,subcommittee for isotopic abundance,

Modified: 2022-07-29

Views: 0

NIST/EPA/NIH Mass Spectral Library with Search Program - SRD 1a

Data provided by  National Institute of Standards and Technology

This database is the product of a multi-year, comprehensive evaluation and expansion of the world's most widely used mass spectral reference library.

Tags: HAPS,chemical analysis,chemical structures,gas chromatography,hazardous air pollutants,mass spectra,mass spectrometry,masses,physics,spectra,structural data,structures,

Modified: 2022-07-29

Views: 0

NIST Thermophysical Properties of Hydrocarbon Mixtures Database- SRD 4

Data provided by  National Institute of Standards and Technology

SUPERTRAPP is an interactive computer program for predicting thermodynamic and transport properties of pure fluids and fluid mixtures containing up to 20 components. The components are selected from a database of 210 components, mostly hydrocarbons. SUPERTRAPP performs phase equilibria calculations and gives the thermophysical properties of all phases and the feed.

Tags: Lennard Jones,butenes,chemical engineering,chemistry,equations of state,flash calculations,fluids,gaseous,gases,hydrocarbons,liquidus,mixtures,natural gases,petrochemicals,phase equilibria,physics,supercritical fluids,thermo chemistry,thermo physical,thermochemical data,thermodynamic data,thermodynamic properties,thermodynamics,thermophysics,transport properties,transport property data,

Modified: 2022-07-29

Views: 0