class35 - Exam 3 on Tuesday April 13 Topics: Chapters 1-7...

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Exam 3 on Tuesday April 13 Topics: Chapters 1-7 with some emphasis on newer materials. You absolutely need to understand how to solve Schrödinger’s eqn. and what solutions mean physically. Format: Same as Exam 2 (bubble) Application of Quantum Tunneling: Radioactive decay George Gamow: 1928 Radioactive decay (Quantum tunneling – George Gamow) Nucleus is unstable ejects alpha particle (2 netrons, 2 protons) Typically found for large atoms with lots of protons and neutrons. Polonium-210 84 protons, Neutron ( no charge ) Proton ( positive charge ) 126 neutrons Nucleus has lots of protons and lots of neutrons. Two forces acting in nucleus: - Coulomb force .. Protons really close together, so very big repulsion from coulomb force - Nuclear force (attraction between nuclear particles is very strong if very close together) ± called the STRONG Force. Radioactive decay Polonium-210 84 protons, 126 neutrons Proton ( positive charge ) Neutron ( no charge ) In alpha-decay, an alpha-particle is emitted from the nucleus. Lead-206 82 protons, 124 neutrons This raises the ratio of neutrons to protons ± makes for a more stable atom. (Neutrons are neutral.
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This note was uploaded on 08/24/2010 for the course PHYS 2130 taught by Professor Staff during the Spring '08 term at Colorado.

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class35 - Exam 3 on Tuesday April 13 Topics: Chapters 1-7...

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