Радиохемија — разлика између измена
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Ред 4:
Радиоактивни распад је случајан процес у којем [[атомско језгро]] из нестабилног прелази у стабилно или стабилније стање уз емисију честица или [[електромагнетно зрачење|електромагнетног зрачења]].
== Историја ==
<!--1895 William Roentgen discovers X-rays (1901 Nobel Prize in Physics).
1896 Henry Becquerel discovers natural radioactivity of uranium (1903 Nobel Prize in physics).
1898 Pierre and Marie Curie discover polonium and radium (1903 Nobel Prize in physics).
1911 George Hevesy uses radioactive lead as a tracer to proof left-over food being recycled into his meals (the Father of Nuclear Medicine).
1923 George Hevesy demonstrates the distribution of radioactive lead in growing bean plants (1943 Nobel Prize in chemistry).
1931 Earnest Lawrence at the University of California, Berkeley invents the cyclotron.
1934 Irene and Frederic Joliot- Curie produce the first artificial radioisotopes (1934 Nobel Prize in physics).
1935 Earnest Lawrence produces radioactive isotopes of sodium by using his new cyclotron. Over the next few years he manufactures another 17 biologically useful radioisotopes.
1939 Joseph Hamilton uses iodine-131 for diagnostic purposes in patients.
1942 The first nuclear reactor is constructed and operated at Oak Ridge National Laboratory (the Manhattan Project).
1946 Radioisotopes produced from the above nuclear reactor become available for research.
1951 Benedict Cassen at the University of California, Los Angeles invents the scintiscanner for the measurement of radioiodine in the body (the first step toward PET).
1958 Hal Anger develops the Anger Camera, which permitted visualization of radiotracer distribution in biological systems.
1975 A former Golden Gloves boxer Michael Phelps and Edward Hoffman in Ter-Pogossian's laboratory develop PETT (Positron Emission Transaxial Tomography). -->
==Врсте радиоактивног распада==
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