G21K HANDLING OF PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
Introduced: September 1968
Last revised: July 1974
Classification Context
- Section:
- PHYSICS
- Class:
- NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- Subclass:
- HANDLING OF PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
Description
G21K covers apparatus and methods for handling particles and ionizing radiation that do not fall within more specialized nuclear physics or engineering classes, including irradiation devices and microscopy systems using gamma rays or X-rays. This subclass encompasses equipment for directing, controlling, and applying particle beams and radiation sources in industrial, medical, and research applications, as well as microscopes that utilize high-energy photons for imaging. Typical technologies include radiation shielding systems, beam transport apparatus, irradiation chambers, and gamma/X-ray microscopy instruments. Excluded from this class are nuclear reactors (G21B), nuclear fuel processing (G21C), and nuclear power plant safety systems (G21D), which are covered by more specific nuclear engineering divisions.
Scope Notes
Glossary: Ionising radiation ‘Ionising radiation’ consists of particles or electromagnetic waves that are sufficiently energetic to detach electrons from atoms or molecules, thus ionising them. Particle particles ‘Particle’ means a molecular, atomic or sub-atomic particle
Related Keywords
5 direct subcodes
Child Classifications
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- G21K 1/00 Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
- G21K 3/00 Ionising radiation filters, e.g. X-ray filters
- G21K 4/00 Conversion screens for the conversion of the spatial distribution of particles or ionising radiation into visible images, e.g. fluoroscopic screens
- G21K 5/00 Irradiation devices
- G21K 7/00 Gamma ray or X-ray microscopes