Elsevier

Nuclear Physics A

Volume 285, Issue 1, 18 July 1977, Pages 156-166
Nuclear Physics A

Magnetic moments of the 12+ isomeric states in 194, 196, 198Pb

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Abstract

The g-factor of the 12+ isomeric state in lead isotopes with A = 194, 196, 198 was measured using the time-differential perturbed angular distribution method (TDPAD). The values obtained are respectively g(194) = −0.158(6); g(196) = −0.157(7); g(198) = −0.144(11). A more precise determination of the 12+ level half-life is also made. The g-factprs of these nuclear states, which are described with v(i132)−2 as the main configuration, are surprisingly constant over a large mass range (between A = 206 and 194). A core polarization analysis explains this trend: the polarization induced on neutrons in i132 orbit decreases with the mass number A (blocking effect), but a compensation is provided by the other spin-orbit partners f72-f52 and P32-P12.

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    Research Institute for Physics Stockholm, Sweden.

    ††

    Université Libre de Bruxelles, Belgique.

    ††

    Université Libre de Bruxelles, Belgique.

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