An international physics journal covering the several methods and phenomena related to the splitting of atomic and nuclear energy levels due to the influence of magnetic fields and electric field gradients. Nuclear magnetic resonance, Mössbauer Effect, and perturbed angular correlation of emitted radiation were the spectroscopic techniques on which researchers reported. We provided a Principal Editorial role from 1980 to 1989.] {ISSN 0304-3843(print), 1572-9540 (online)}

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