The classification codes are three-letter abbreviations, the first letter indicating the general group of processes to which a process belongs (e.g. E for electron-heavy particle interactions). In the examples, A, B and C refer to an arbitrary atom and n an arbitrary integer greater than 1.
|EAE||Auger Electron Ejection||
Electron-impact induced Auger electron ejection
|e- + A → A**+ + 2e-; A**+ → A*2+ + e-|
Differential electron-scattering cross sections, usually as a function of energy and angle.
The emission of electromagnetic radiation by a charged particle as it is decelerated through Coulomb interactions with other charges; "free-free" radiation in the context of plasma physics.
|e- + A → e- + A + hν|
|e- + AB → A + B-|
|e- + A+ → A**|
Electron-impact dissociative excitation
|e- + AB → A* + B + e-|
Electron-impact dissociative ionization
|e- + AB → A+ + B + 2e-|
|EDP||Depolarization, Change of Polarization||
Electron-impact change of polarization, including depolarization
Electron-impact dissociative recombination
|e- + AB+ → A + B|
|e- + AB → A + B + e-|
|e- + A- → A + 2e-|
Generic inelastic collisional processes in which a scattered electron gains energy from the target particle.
|e- + A* → e- + A|
Scattering of an electron with no change in energy.
|e- + A → e- + A|
|e- + A → e- + A*|
|EEX||Change of Excitation||
Electron-impact change of excitation. Deprecated: Use EEX: Excitation or EDX: De-excitation instead.
|e- + A* → e- + A**|
|EFL||Fluorescence (Optical Emission)||
Total optical emission following electron-impact events
General electron-impact processes that do not fall into any more specific category.
Transport cross sections: momentum, viscosity and higher-order.
Electron impact ionization
|e- + A → A+ + 2e-|
Electron-impact induced formation of a (positive, negative) ion pair
|e- + AB+ → A+ + B-|
|ELB||Line Broadening, Shapes and Shifts||
Data relating to the line shapes and positions of radiative transitions
Electron-impact ionization to a charge state greater than +1
|e- + A → An+ + (n+1)e-|
Electron impact momentum transfer
|ENI||Negative Ion Formation||
Electron-impact formation of negative ion (attachment)
|e- + A → A-|
|e- + An+ → A(n-1)+|
Electron-impact dielectronic recombination
|e- + A+ → A** → A* + hν|
Electron-ion recombination involving a third body other than an electron
|e- + A+ + B → A + B|
Electron-impact recombination with radiative emission
|e- + A+ → A + hν|
Electron-impact three-body recombination
|e- + e- + A+ → A + e-|
Electron-impact rovibrational excitation
|e- + AB → e- + AB (v=*; J=*)|
Electron-impact change of spin state
|e- + [S]A → e- + [S']A|
Total electron scattering cross sections
Electron-impact collision with unknown products. Deprecated: use EGN (General) instead.
Electron-impact electronic excitation
|e- + AB → e- + AB*|
Electron-impact rotational excitation
|e- + AB → e- + AB (J=*)|
Electron-impact vibrational excitation
|e- + AB → e- + AB (v=*)|
Photon scattering ( angular diffusion)
|PAE||Auger Electron Ejection||
Photon-induced Auger electron ejection
|A + hν → A**+ + e-; A**+ → A*2+ + e-|
Inelastic scattering of a photon by a charged particle that decreases the photon energy.
|PDP||Depolarization, Change of Polarization||
Photon-induced change of polarization, including depolarization
Photodissociation of a molecule
|hν + AB → A + B|
Absorption of a photon inducing the removal of an electron from an anion to form a neutral species.
|hν + A- → A + e-|
|PEA||Effective Absorption, Total Diffusion||
Effective Absorption, Total Diffusion of photons
Photon elastic diffusion processes (Thomson scattering, Rayleigh scattering)
Scattering of a photon with no change in energy.
|hν + A → hν + A|
Photon absorption leading to excitation
|hν + A → A*|
Acceleration of a charged particle by a photon absorption process mediated by an electron-particle Coulomb interaction; "free-free absorption" in the context of plasma physics.
|e- + A + hν → A + e-|
|A* → A + hν|
|PGF||General Electromagnetic Field||
Miscellaneous effects induced by an electromagnetic field
General photon-particle interaction processes which do not fall into any more specific category
|hν + A → A+ + e-|
Photon-induced formation of a (positive, negative) ion pair
|AB + hν → A+ + B-|
Absorption of more than one photon, leaving to excited and/or charged products
|nhν + A → A+/A*/A*+|
Non-linear radiative effects
Radiative decay (not necessarily fluorescence)
|A* → A + hν|
Photon-induced rovibrational excitation
|BC + hν → BC (v=*; J=*)|
Spectral line-splitting caused by an external electric field
True Absorption of a photon
|PTF||Interaction with Time-Varying Fields||
General interactions with time-varying fields
|PTS||Total Absorption, Total Scattering||
Total photon absorption or scattering cross sections.
Photon-induced electronic excitation
|BC + hν → BC*|
Photon-induced rotational excitation
|BC + hν → BC (J=*)|
Photon-induced vibrational excitation
|BC + hν → BC (v=*)|
Spectral line-splitting caused by a static magnetic field
Heavy-particle collision leading to association (i.e. bond formation)
|A + B → AB|
Heavy particle impact associative ionization
|A + B → AB+ + e-|
Heavy particle impact radiative ionization
|A + B → AB + hν|
Heavy-particle differential scattering cross sections, usually as a function of energy and angle.
Heavy-particle impact leading to charge-transfer.
|A+ + B → A + B+; A- + B → A + B-|
|HDC||Dissociative Charge Transfer||
Heavy-particle dissociative charge transfer
|A+ + BC → A + B+ + C|
Heavy particle impact dissociative excitation
|A + BC → A* + B + C; A + BC → A + B + C*|
Heavy particle impact dissociative ionization
|A + BC → A+ + B + C; A + BC → A + B+ + C|
Heavy particle impact dissociative neutralisation
|AB- + C+ → A + B + C|
Heavy-particle impact leading to dissociation (bond-breaking)
|A + BC → A + B + C|
Heavy-particle collisions leading to electronic detachment.
|A + B- → A + B + e-|
Heavy-particle impact leading to de-excitation (decrease of total internal energy).
|A* + B → A + B|
|HEL||Inelastic Energy Losses||
Heavy-particle collisions leading to inelastic energy loss.
Scattering of heavy particles with no change in energy.
|A + B → A + B|
Heavy-particle collisions with energy transfer between the particles.
Heavy-particle impact leading to excitation (increase of total internal energy).
|A + B → A* + B|
Heavy particle collisional excitation followed by radiative decay.
|A + B → A* + B; A* → A + hν|
General heavy-particle collisional processes which do not fall into any more specific category
Heavy particle transport cross sections: momentum, viscosity and higher-order.
Heavy-particle collisions leading to ionization
|A + B → A + B+ + e-|
Interaction potentials between heavy particles.
Heavy-particle interchange reactions
|A + BC → AB + C|
|HLB||Line Broadening, Shapes and Shifts||
Data relating to line shapes and positions determined by heavy-particle collisions.
Heavy particle impact ionization with a charge state change greater than +1
|A + B → An+ + (n+1)e- + B|
|HMN||Mutual Ion-Ion Neutralization||
Neutralization of heavy-particle ions.
|A+ + B- → A + B|
Heavy particle momentum transfer
Ionization through collision of an internally-excited heavy-particle with another heavy particle.
|A* + B → A + B+ + e-|
Heavy-particle collisions with recombination
Heavy particle impact rovibrational excitation
|A + BC → A + BC (v=*; J=*)|
Ionization of the projectile in a heavy-particle collision.
|A + B → A+ + B + e-|
Heavy-particle electron transfer
|A- + B → A + B-|
Transfer of an electron from an atom to an ion, followed by further ionization.
|A + B+ → A2+ + B + e-|
Total heavy particle scattering cross sections
Heavy-particle collisions/reactions with unknown products.
|A + B → ?|
Heavy particle impact electronic excitation
|A + BC → A + BC*|
Heavy particle impact fine-level excitation
|A + B → A + B (J=*)|
Heavy particle impact hyperfine-level excitation
|e- + AB → e- + AB (F=*)|
Heavy particle impact rotational excitation
|A + BC → A + BC (J=*)|
Transfer of internal excitation in a heavy-particle collision.
|A* + B → A + B*|
Heavy particle impact vibrational excitation
|A + BC → A + BC (v=*)|
Autodetachment in atoms and molecules
Autoionization processes in atoms and molecules.
Dynamic polarizability of atoms and molecules
Autodissociation in atoms and molecules
|SEW||Energy Levels and Wavelengths||
Energy levels and transition frequencies / wavelengths of atoms and molecules.
Forbidden transitions in atoms and molecules
General spectral processes and structural properties that do not fall into any more specific category
Hyperfine structure of atoms and molecules
Interatomic Potentials as they relate to the spectral or structural properties of atoms or molecules.
Isoelectronic sequences of atoms
Ionization potentials of atoms and molecules.
Infrared spectra of atoms and molecules
|SLS||Line Broadening, Shapes and Shifts||
Data relating to line shapes and positions with a focus on spectroscopy or atomic/molecular structure.
Magnetic moments (dipolar, quadrupolar, etc.) of atoms and molecules.
|SPM||Polarizabilities, Electric Moments||
Polarizabilities and electric moments (dipolar, quadrupolar, etc.) of atoms and molecules.
QED effects in atoms and molecules
Raman spectroscopy of atoms and molecules.
Relaxation processes in atoms and molecules.
Rotational spectra of molecules
Rydberg states of atoms and molecules.
|SSM||Potential Curves and Structure of Molecules||
Potential energy curves/surfaces and molecular structure data.
|STP||Transition Probabilities and Oscillator Strengths||
Transition probabilities (Einstein A-factors), oscillator strengths and line intensities of radiative transitions in atoms and molecules.
UV spectra of atoms and molecules from ~10 nm (extreme ultraviolet) to ~400 nm (near ultraviolet).
Vibrational spectra of molecules
Visible spectra of atoms and molecules
X-Ray spectra of atoms and molecules
Adsorption on a surface
Backscattering from a surface
|MCP||Charge State Population||
Charge state population of condensed materials.
Chemical reactions at a surface
Chemical sputtering of surfaces.
Desorption from a surface.
Deposition on a surface.
|MEL||Energy Loss and Stopping Power||
Energy loss and stopping power of materials with respect to a flux of particles.
|MEP||Excited State Population||
Excited state population of condensed materials.
Erosion of a surface (over a longer timescale than sputtering)
General particle-matter interaction processes that do not fall into any more specific category.
|MIR||Particle-Impact Induced Radiation||
Radiation induced by particle impact on surfaces.
Multiple scattering of particles within a material.
|MNE||Neutralization, Ionization, Dissociation||
Neutralization, ionization or dissociation at a surface.
|MPE||Photoelectric Ejection of Electrons||
Ejection of electrons due to incoming radiation (the photoelectric effect).
Permeation of particles through a solid
Data relating to the particle transmission through a material.
Physical sputtering of surfaces.
Re-emission of accommodated particles at a surface
Reflection of particles from a surface.
|MRH||Reflection of Heavy Particles from Surfaces||
Reflection of heavy particles from surfaces
|MRL||Reflection of Electrons from Surfaces||
Reflection of electrons from surfaces
Radiation-enhanced sublimation of solids.
Surface damage of a surface due to impinging particles over a short timescale.
|MSE||Secondary Electron Emission||
Secondary electron emission from a surface.
Interactions at surfaces.
Sputtering of surface material by impinging particles
Trapping and detrapping of accommodated particles in a solid.
Transmutation of nuclei in solid material by impact of subatomic particles.
|MVP||Vapour Formation and Properties||
Formation and properties of vapour in front of a surface; in the context of plasma physics, vapour shielding phenomena.
|DEH||Electron-Heavy Particle Interactions||
Data compilations concerning electron-heavy particle interactions.
General data compilations that do not fall into any more specific category.
|DHH||Heavy Particle-Heavy Particle Interactions||
Data compilations concerning heavy particle-heavy particle interactions.
|DPF||Photon-Particle and Field-Particle Interactions||
Data compilations concerning photon-particle and field-particle interactions.
Data compilations concerning particle-matter interactions.
|DSS||Structure and Spectra||
Data compilations concerning atomic and molecular structure and spectra.
Data compilations concerning transport properties.
|BEH||Electron-Heavy Particle Interactions||
Bibliographic data resources concerning electron-heavy particle interactions.
General bibliographic data resources that do not fall into any more specific category.
|BHH||Heavy Particle-Heavy Particle Interactions||
Bibliographic data resources concerning heavy particle-heavy particle interactions.
|BPF||Photon-Particle and Field-Particle Interactions||
Bibliographic data resources concerning photon-particle and field-particle interactions.
|BSS||Structure and Spectra||
Bibliographic data resources concerning atomic and molecular structure and spectra.
Bibliographic data resources concerning transport properties.
|COM||Composite Process with Multiple Channels||
Process occuring through multiple channels with no uniquely-defined products. For example, the summed cross section of ionization and charge-exchange.
|A + B → An+|