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Nuclear physics is a branch of physics that looks at the constituents and interactions of atomic nuclei. Applications of nuclear physics include nuclear power generation and nuclear weapons technology. Nuclear physics also provides applications in nuclear medicine, magnetic resonance imaging, ion implantation and radio carbon dating. Particle physics is often associated with nuclear physics.

Historically, nuclear physics and atomic physics were distinct disciplines. In 1896 Henri Becquerel discovered radioactivity. At the beginning of the 20th century, J.J. Thomson founded the plum pudding model. This model displayed the atom as a large positively charged ball with small negatively charged electrons embedded inside of it.

After the plum pudding model’s discovery, scientists found three types of radiation emanating from atoms, alpha, beta and gamma radiation. It was found that the beta decay spectrum was continuous rather than discrete. Electrons were being ejected from the atom with a range of energies rather than a discrete amount of energies that was observed in gamma and alpha decays. This indicated that energy was not conserved in these decays.

Modern nuclear physics looks at nuclei under extreme conditions such as high spin and excitation energy. Experiments on these nuclei’s can create artificially induced fusion and nucleon transfer reactions. These artificially induced reactions are very useful modern technologies.

Categories within Nuclear

Nuclear Reactions

Postings: 115

A nuclear reaction is the process of two or more nuclei colliding to produce one or more nuclide that are different from the nuclei's at the beginning of the process.

Nuclear Reaction Energy Problem

Energy is released during a nuclear reaction due to a conversion between mass and energy. Mass is not conserved; the initial and final amounts are different. If a total of 1 gram of mass is "missing," how much energy has been released?

Detailed Explanation to Kinetic Energy

Scenario: A neutron in a nuclear reactor makes an elastic head-on collision with the nucleus of a uranium atom initially at rest. (a) What fraction of the neutron's kinetic energy is transferred to the uranium nucleus? (The mass of the uranium nucleus is about 238 times the mass of the neutron.) (b) If the initial kinetic

Temperature of water

In a nuclear submarine power plant, the temperature of the water in the reactor is above 100C. How is this possible? I believe it has to do with the cooling process of boiling water, but would like a little guidance. Thank you for your help!