Nuclear Reaction
Hello All of E-c students from myanmar. Learning is as follow; Chapter 7—Nuclear Reactions 7-3 At high enough excitation energies, a nucleus can undergo a series of normal modes of collective oscillations called giant resonances. The nucleus rings like a bell at distinct frequencies with all the nucleons participating and sharing the excitation energy. Fusion reactions are the combining of two nuclei to form a more massive nucleus. Many fusion reactions release large amounts of energy. An example is the combining of two isotopes of hydrogen (tritium and deuterium) to form helium and a neutron plus a large amount of kinetic energy in the reaction products: 3H + 2H Æ 4He + n + 17.6 MeV. This reaction as a potential electric power source is discussed in Chapter 14. Another example of fusion is the reaction set that powers the Sun and other low-mass stars: 1H + 1H Æ 2H + e+ + ne, 2H + 1H Æ 3He + g, 3He + 3He Æ 4He +1H + 1H. The net energy output from this chain is 26.7 MeV for each helium-...