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\section{H nuclear moment}  {{}_1}^1H, {}^{1}_{1}H  Reference https://www.physicsforums.com/threads/latex-isotopes-how-to-align-left-indices.602428/,  the predominant stable isotope of hydrogen, has a nuclear spin $I = 1/2$ and a nuclear magnetic moment $\mu = 2.79278$ \cite{Fuller_1976}.