Nuclear magneton - Kakujishi

Japanese: 核磁子 - カクジシ
Nuclear magneton - Kakujishi
The basic unit of magnetic moment of atomic nuclei and elementary particles. If the elementary charge is e, the Planck constant is h, and the rest mass of the proton is m p , then the nuclear magneton μ N is eh/4πm p = 5.051× 10-27 J/T (Joules/Tesla), which is approximately 1/1850 the size of the Bohr magneton of an electron. The magnetic moments of protons and neutrons should be 1 and 0, respectively, using the nuclear magneton as a unit, but in reality the magnetic moment of the proton is 2.79 times the nuclear magneton, and that of the neutron is -1.91 times. These are called anomalous magnetic moments that arise due to the internal structure of protons and neutrons. Nuclear Bohr magneton.

Source: About Shogakukan Digital Daijisen Information | Legend

Japanese:
原子核や素粒子の磁気モーメントの基本単位。電気素量e、プランク定数h、陽子の静止質量mpとすると、核磁子μNは、eh/4πmp=5.051×10-27J/T(ジュール/テスラ)となり、電子のボーア磁子の約1850分の1の大きさをもつ。陽子、中性子の磁気モーメントは核磁子を単位として、それぞれ、1、0の値をもつはずだが、実際には陽子の磁気モーメントは核磁子の2.79倍、中性子は-1.91倍となる。これらは陽子や中性子が内部構造をもつために生じる異常磁気モーメントとよばれる。核ボーア磁子。

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