Describes a number of elementary particles, if such a description is essential for a particular process. An example can be provided by photoionization.
If a particle is needed in some of the processes, then it must have a speciesID (SpeciesIDType) identifier to enable referencing it. The attribute name of the type is mandatory. It is defined as a restriction of String, that may take following values:
- photon
- electron
- muon
- positron
- neutron
- alpha
- cosmic
Name cosmic may be used for collisions with cosmic ray particles, where the nature of a particle is not important, but what matters is it’s energy.
Other particle names may be added in future versions, based on schema users requests.
ParticleProperties XML element may contain some static properties of the particle:
- ParticleCharge integer element,
- ParticleMass element of DataType,
- ParticleSpin (type AngularMomentumType), and
- ParticlePolarization element (type AngularMomentumProjectionType).