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Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. The fission process often produces gamma photons, and releases a very large amount of energy even by the energetic standards of radioactive decay.
Nuclear fission was discovered on 19 December 1938 in Berlin by German chemists Otto Hahn and Fritz Strassmann. Physicists Lise Meitner and her nephew Otto Robert Frisch explained it theoretically in January 1939. Frisch named the process "fission" by analogy with biological fission of living cells. In their second publication on nuclear fission in February 1939, Hahn and Strassmann predicted the existence and liberation of additional neutrons during the fission process, opening up the possibility of a nuclear chain reaction.
Engraver: Mario Rossello
Obverse
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Depicts a part of the coat of arms of San Marico, the country name above, the motto below. REPUBBLICA DI SAN MARINO |
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Reverse
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Depicts a symbolic view of nuclear fission, the issue year above, the denomination below, and the engraver's name on the left. 1986 |
Edge |
50 Lire
Technological Revolution
Nuclear Fission
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KM# 192
Technological Revolution
Nuclear Fission
Characteristics
Type | Commemorative Issue (Circulating) |
Material | Stainless Steel |
Weight | 6.25 g |
Diameter | 24.8 mm |
Thickness | - |
Shape | round |
Alignment | Coin |
Mint |
Italian State Mint and Polygraphic Institute (IPZS)
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