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Incoming links: Neutron physics
Ilya Frank Created 2026-10-24 Updated 2026-11-05
Ilya Frank worked on the experiments and theoretical interpretation of Cherenkov radiation. With Igor Tamm, he explained in 1937 why radiation from a sufficiently fast charged particle adds coherently in a medium. The emission direction is linked to the particle's speed and the refractive index, so an observed optical pattern can carry particle-identification information. His later work also established a substantial programme in neutron physics.[ref]
Ilya Mikhailovich Frank: first FLNP JINR director, laureate of Nobel Prize by Joint Institute for Nuclear Research. Participation in the liquid-irradiation work, 1937 theory and later neutron-physics programme
A physicist.[ref]
https://www.nobelprize.org/prizes/physics/1958/frank/biographical/. Independent professional profile
Portrait of Ilya Frank
. Nobel Foundation. Public domain in Sweden per Commons PD-Sweden photo tag; separate U.S. status tag not present on inspected File. Source usage terms, via Wikimedia Commons. Source.
Neutron physics 2026-11-05
Neutron physics studies the production, interaction, transport and detection of neutrons. A neutron has no net electric charge, so it does not experience the long-range Coulomb repulsion that impedes charged particles approaching a positively charged atomic nucleus. Its nuclear interactions nevertheless depend strongly on energy and target isotope.
Elastic scattering can slow neutrons in a neutron moderator, capture can change a nucleus, and suitable reactions can initiate nuclear fission. Neutron magnetic moments also couple to magnetic structure, enabling magnetic neutron diffraction. A measured attenuation therefore combines different reaction channels and must not be interpreted as one universal absorption probability.
Nuclear engineering Created 2026-10-20 Updated 2026-11-05
Nuclear engineering designs and studies systems that use nuclear reactions or manage materials with radioactivity. Its subjects include nuclear reactors, radiation detection, radiation shielding, nuclear fuel, the behaviour of structural materials under irradiation, and radioactive waste management.
A nuclear power plant shows why several areas of engineering must work together. Nuclear fission releases energy; a coolant transports the resulting heat; a heat engine converts part of that heat to mechanical work; an electrical generator produces electrical energy. In a pressurized water reactor, a heat exchanger transfers heat from the pressurized reactor coolant to a separate circuit that produces steam. Thus neutron physics, heat transfer, fluid mechanics and materials science constrain the same design.[ref]