| G | SK | PHYSICS |
| G21 | USK | NUCLEONICS |
| G21 | KL | NUCLEAR PHYSICS; NUCLEAR ENGINEERING |
| G21H | UKL | OBTAINING ENERGY FROM RADIOACTIVE SOURCES; APPLICATIONS OF RADIATION FROM RADIOACTIVE SOURCES; UTILISING COSMIC RADIATION (measurement of nuclear or X-radiation G01T; fusion reactors G21B; nuclear reactors G21C; semiconductor devices sensitive to electromagnetic or corpuscular radiation H01L 31/00) |
| G21H 1/00 | HGR | Arrangements for obtaining electrical energy from radioactive sources, e.g. from radioactive isotopes |
| G21H 1/02 | UGR1 | | . | Cells charged directly by beta radiation |
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| G21H 1/04 | UGR1 | | . | Cells using secondary emission induced by alpha radiation, beta radiation, or gamma radiation (discharge tubes H01J 40/00 , H01J 47/00) |
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| G21H 1/06 | UGR1 | | . | Cells wherein radiation is applied to the junction of different semiconductor materials |
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| G21H 1/08 | UGR1 | | . | Cells in which radiation ionises a gas in the presence of a junction of two dissimilar metals, i.e. contact potential-difference cells (discharge tubes H01J) |
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| G21H 1/10 | UGR1 | | . | Cells in which radiation heats a thermoelectric junction or a thermionic converter (discharge tubes functioning as thermionic generators H01J 45/00; thermoelectric devices comprising a junction of dissimilar materials H01L 35/00) [2] |
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| G21H 1/12 | UGR1 | | . | Cells using conversion of the radiation into light combined with subsequent photoelectric conversion into electric energy |
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| G21H 3/00 | HGR | Arrangements for direct conversion of radiation energy from radioactive sources into forms of energy other than electric energy, e.g. light (lasers H01S 3/00) |
| G21H 3/02 | UGR1 | | . | in which material is excited to luminesce by the radiation (lamps in which a gas filling or screen or coating is excited to luminesce by radioactive material structurally associated with the lamp H01J 65/00) |
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| G21H 5/00 | HGR | Applications of radiation from radioactive sources or arrangements therefor (producing mutation in plants A01H 1/06; preservation of dairy products A23C; preservation of foodstuffs A23L 3/26; for therapeutic purposes A61N 5/10; in chemical, physical or physicochemical processes in general B01J 19/08; in electrostatic separation B03C 3/38; for after-treatment of coatings applied as liquids or other fluent materials B05D 3/06; for action between electric vehicles and tracked apparatus B61L 1/10 , B61L 3/06; introducing isotopes into organic compounds C07B 59/00; for preparation of organic chemical compounds C07 , C08 , e.g. C08F 2/46; for treating macromolecular substances or articles made therefrom B29C 71/04 , C08J 3/28 , C08J 7/18; for cracking of hydrocarbon oils C10G 15/00 , C10G 32/04; for reforming naphtha C10G 35/16; preservation or ageing of products obtained from fermentation processes C12H 1/06 , C12H 1/16; for bleaching fibres D06L 3/04; measuring G01; irradiation devices, gamma- or X-ray microscopes G21K; in discharge tubes H01J; apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere, H01T 23/00; for carrying-off electrostatic charges H05F 3/06) |
| G21H 5/02 | UGR1 | |
| G21H 7/00 | HGR | Use of effects of cosmic radiation |