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isospin

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isospin

 or isobaric spin or isotopic spin

Property characteristic of families of related subatomic particles differing mainly in the values of their electric charge. The families are known as isospin multiplets. The components of atomic nuclei, the neutron and the proton, form an isospin doublet since they differ only in electric charge and subsidiary properties. They are considered different versions of the same object, called a nucleon. The isospin of a nucleon has a value of ¹⁄₂.


isospin [′ī·sə‚spin]
(nuclear physics)


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What's more, your everyday gluon has something called negative intrinsic parity and zero isospin.
Among the topics are no-core shell model and reactions, direct reactions with exotic nuclei, isoscaling and symmetry energy in dynamical fragment formation, "pasta" phases in dense stars, and isospin effects on fragmentation mechanisms.
In the case of the strong interaction, the gauge symmetry is the isospin symmetry--the strong interactions are invariant under rotations in the isospin space).
 
 
 
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