英语词汇“isotopic spin”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

b. Of, pertaining to, or designating isospin; originally and chiefly in isotopic spin = isospin n.

ΘΚΠ

the world > matter > physics > atomic physics > particle physics > [adjective] > relating to isospin

isotopic1937

1937 E. Wigner in Physical Rev. 51 106/2 W. Heisenberg..considered protons and neutrons as different states of the same particle. Heisenberg introduced a variable τ which we shall call the isotopic spin, the value −1 of this variable can be assigned to the proton state of the particle, the value +1 to the neutron state.

1937 E. Wigner in Physical Rev. 51 107/1 The Pauli principle requires that the wave function Ψ(r₁s₁τ₁, r₂s₂τ₂,…, r_ns_nτ_n) be antisymmetric with respect to the simultaneous interchange of Cartesian, spin and isotopic spin variables of any pair of heavy particles. This fact is quite analogous to the similar statement for ordinary spin.

1937 E. Wigner in Physical Rev. 51 117/1 Terms with different ζ components of the isotopic spin have the same energy in approximation 2. These are, of course, terms of different isobaric nuclei, and a total isotopic spin T will be a term with the same binding energy for all nuclei with isotopic numbers from − T to T.

1953 M. Gell-Mann in Physical Rev. 92 833/2 Let us suppose that the new unstable particles are fermions with integral isotopic spin and bosons with half~integral isotopic spin. For example, the V₁ particles may form an isotopic triplet, consisting of V₁⁺, V₁⁰, and V₁⁻. The τ⁺ and V₄⁰ may form an isotopic doublet, which we may call τ⁺ and τ⁰.

1963 K. W. Ford World of Elem. Particles viii. 235 For a group of nucleons, a rotation of the total isotopic-spin vector in I space corresponds to changing from one nucleus to another without changing the total number of nucleons.

1963 K. W. Ford World of Elem. Particles viii. 235 New particles..were found to come in closely linked groups, like proton and neutron. There were three pions which formed a triplet and could be described as three states of a single pion with one unit of isotopic spin.

1965 Listener 2 Sept. 332/1 Abstract quantities known as ‘isotopic spin’ and ‘hyper~charge’.

1969 D. H. Wilkinson Isospin i. 3 It is clear that Wigner gave the isotopic spin that name because it is a vector whose z-projection, ½(N − Z), distinguished one isotope from another along an isobaric multiplet. In fact Wigner often called T_z itself the isotopic spin and T ‘the total isotopic spin quantum number’. Others felt that a stronger case could be made to call the new quantum number the isobaric spin because its magnitude was constant along an isobaric multiplet.

单词	isotopic spin
释义	> as lemmas isotopic spin b. Of, pertaining to, or designating isospin; originally and chiefly in isotopic spin = isospin n. ΘΚΠ the world > matter > physics > atomic physics > particle physics > [adjective] > relating to isospin isotopic1937 1937 E. Wigner in Physical Rev. 51 106/2 W. Heisenberg..considered protons and neutrons as different states of the same particle. Heisenberg introduced a variable τ which we shall call the isotopic spin, the value −1 of this variable can be assigned to the proton state of the particle, the value +1 to the neutron state. 1937 E. Wigner in Physical Rev. 51 107/1 The Pauli principle requires that the wave function Ψ(r₁s₁τ₁, r₂s₂τ₂,…, r_ns_nτ_n) be antisymmetric with respect to the simultaneous interchange of Cartesian, spin and isotopic spin variables of any pair of heavy particles. This fact is quite analogous to the similar statement for ordinary spin. 1937 E. Wigner in Physical Rev. 51 117/1 Terms with different ζ components of the isotopic spin have the same energy in approximation 2. These are, of course, terms of different isobaric nuclei, and a total isotopic spin T will be a term with the same binding energy for all nuclei with isotopic numbers from − T to T. 1953 M. Gell-Mann in Physical Rev. 92 833/2 Let us suppose that the new unstable particles are fermions with integral isotopic spin and bosons with half~integral isotopic spin. For example, the V₁ particles may form an isotopic triplet, consisting of V₁⁺, V₁⁰, and V₁⁻. The τ⁺ and V₄⁰ may form an isotopic doublet, which we may call τ⁺ and τ⁰. 1963 K. W. Ford World of Elem. Particles viii. 235 For a group of nucleons, a rotation of the total isotopic-spin vector in I space corresponds to changing from one nucleus to another without changing the total number of nucleons. 1963 K. W. Ford World of Elem. Particles viii. 235 New particles..were found to come in closely linked groups, like proton and neutron. There were three pions which formed a triplet and could be described as three states of a single pion with one unit of isotopic spin. 1965 Listener 2 Sept. 332/1 Abstract quantities known as ‘isotopic spin’ and ‘hyper~charge’. 1969 D. H. Wilkinson Isospin i. 3 It is clear that Wigner gave the isotopic spin that name because it is a vector whose z-projection, ½(N − Z), distinguished one isotope from another along an isobaric multiplet. In fact Wigner often called T_z itself the isotopic spin and T ‘the total isotopic spin quantum number’. Others felt that a stronger case could be made to call the new quantum number the isobaric spin because its magnitude was constant along an isobaric multiplet. extracted from isotopicadj. < as lemmas
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