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The following table shows radiation quantities in SI and non-SI units: Ionizing radiation related quantities view  ‧  talk  ‧   edit Quantity Unit Symbol Derivation Year SI equivalence Activity ( A ) becquerel Bq s−1 1974 SI unit curie Ci 3.7 × 1010 s−1 1953 3.7 × 1010 Bq rutherford Rd 106 s−1 1946 1,000,000 Bq Exposure ( X ) coulomb per kilogram C/kg C⋅kg−1 of air 1974 SI unit röntgen R esu / 0.001293 g of air 1928 2.58 × 10−4 C/kg Absorbed dose ( D ) gray Gy J⋅kg−1 1974 SI unit erg per gram erg/g erg⋅g−1 1950 1.0 × 10−4 Gy rad rad 100 erg⋅g−1 1953 0.010 Gy Equivalent dose ( H ) sievert Sv J⋅kg−1 × W R 1977 SI unit röntgen equivalent man rem 100 erg⋅g−1 x W R 1971 0.010 Sv Effective dose ( E ) sievert Sv J⋅kg−1 × W R x W T 1977 SI unit röntgen equivalent man rem 100 erg⋅g−1 x W R x W T 1971 0.010 Sv The measure of the ionizing effect of gamma and X-rays in dry air is called the exposure, for w...

Nuclear physics Nucleus  · Nucleons (p, n)  · Nuclear matter  · Nuclear force  · Nuclear structure  · Nuclear reaction Models of the nucleus Liquid drop  · Nuclear shell model  · Interacting boson model  · Ab initio Nuclides' classification Isotopes – equal Z Isobars – equal A Isotones – equal N Isodiaphers – equal N  −  Z      Isomers – equal all the above Mirror nuclei – Z ↔ N Stable  · Magic  · Even/odd  · Halo (Borromean) Nuclear stability Binding energy  · p–n ratio  · Drip line  · Island of stability  · Valley of stability  · Stable nuclide Radioactive decay Alpha α  · Beta β (2β, β+)  · K/L capture  · Isomeric (Gamma γ  · Internal conversion)  · Spontaneous fission  · Cluster decay  · Neutron emission  · Proton emission Decay energy  · Decay chain  · Decay product  · Radiogenic nuclide Nuclear fission Spontaneous  · Products (pair breaking)  · Photofission Capturing processes electron (2×)  · neutron (s  · r)  · proton (p  · rp...