1) Topic in particle physics
Found on
https://www.crosswordclues.com/clue/isospin
In particle physics, isospin (isotopic spin, isobaric spin) is a quantum number related to the strong interaction. Particles that are affected equally by the strong force but have different charges (e.g. protons and neutrons) can be treated as being different states of the same particle with isospin values related to the number of charge states. A...
Found on
http://en.wikipedia.org/wiki/Isospin
property that is characteristic of families of related subatomic particles differing principally in the values of their electric charge. The families ... [1 related articles]
Found on
http://www.britannica.com/eb/a-z/i/45
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