Magnetic dipole moment of the doubly-closed-shell plus one proton nucleus ^{49}sc |
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Authors: | T Ohtsubo N J Stone J R Stone I S Towner C R Bingham C Gaulard U Köster S Muto J Nikolov K Nishimura G S Simpson G Soti M Veskovic W B Walters F Wauters |
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Institution: | Department of Physics, Niigata University, Niigata 950-2181, Japan. |
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Abstract: | The nucleus ^{49}Sc, having a single f_{7/2} proton outside doubly magic ^{48}Ca (Z=20, N=28), is one of the very few isotopes which makes possible testing of the fundamental theory of nuclear magnetism. The magnetic moment has been measured by online β NMR of nuclei oriented at milli-Kelvin temperatures to be (+)5.616(25) μ_{N}. The result is discussed in terms of a detailed theory of the structure of the magnetic moment operator, showing excellent agreement with calculated departure from the f_{7/2} Schmidt limit extreme single-particle value. The measurement completes the sequence of moments of Sc isotopes with even numbers of f_{7/2} neutrons: the first such isotopic chain between two major shells for which a full set of moment measurements exists. The result further completes the isotonic sequence of ground-state moments of nuclei with an odd number of f_{7/2} protons coupled to a closed subshell of f_{7/2} neutrons. Comparison with a recent shell-model calculation of the latter sequence is made. |
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