Ch29_part1

Ch29_part1 - Chapter 29, part 1 PHY213 Milestones in the...

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Chapter 29, part 1 PHY213 1 Chapter 29 Nuclear Physics Milestones in the Development of Nuclear Physics s 1896 – the birth of nuclear physics s Becquerel discovered radioactivity in uranium compounds s Rutherford showed the radiation had three types s Alpha (He nuclei) s Beta (electrons) s Gamma (high-energy photons) More Milestones s 1911 Rutherford, Geiger and Marsden performed scattering experiments s Established the point mass nature of the nucleus s Nuclear force was a new type of force s 1919 Rutherford and coworkers first observed nuclear reactions in which naturally occurring alpha particles bombarded nitrogen nuclei to produce oxygen Milestones, final s 1932 Cockcroft and Walton first used artificially accelerated protons to produce nuclear reactions s 1932 Chadwick discovered the neutron s 1933 the Curies discovered artificial radioactivity s 1938 Hahn and Strassman discovered nuclear fission s 1942 Fermi and collaborators achieved the first controlled nuclear fission reactor
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Chapter 29, part 1 PHY213 2 Some Properties of Nuclei s All nuclei are composed of protons and neutrons s Exception is ordinary hydrogen with just a proton s The atomic number , Z, equals the number of protons in the nucleus s The neutron number , N, is the number of neutrons in the nucleus s The mass number , A, is the number of nucleons (neutrons+protons) in the nucleus s A = Z + N s Nucleon is a generic term used to refer to either a proton or a neutron s The mass number is not the same as the mass
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This note was uploaded on 08/25/2009 for the course PHY 213 taught by Professor Cao during the Summer '08 term at Kentucky.

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Ch29_part1 - Chapter 29, part 1 PHY213 Milestones in the...

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