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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

process, physical process go
a sustained phenomenon or one marked by gradual changes through a series of states

action, activity, natural process, natural action go
a process existing in or produced by nature (rather than by the intent of human beings)

release go
a process that liberates or discharges something

emission
the release of electrons from parent atoms

noun.process

6 Subcategories

photoemission go
an emission of photoelectrons (especially from a metallic surface)
field emission go
the emission of electrons that are stripped from parent atoms by a high electric field
photoelectric emission go
the release or absorption of quanta above a certain energy level
radiation, radioactivity go
the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
secondary emission go
the emission of electrons from a surface that is bombarded by higher energy primary electrons
thermionic emission, thermal emission go
the emission of electrons from very hot substances