Core polarization for M2 transitions in odd-A tin isotopes |
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Authors: | AI Vdovin Ch Stoyanov W Andrejtscheff |
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Institution: | Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, USSR;Bulgarian Academy of Sciences, Institute of Nuclear Research and Nuclear Energy, 1184 Sofia, Bulgaria |
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Abstract: | The reduced M2 transition probabilities in the odd-A isotopes 109–121Sn are found to reveal a specific behaviour. B(M2) values are calculated in the framework of the quasiparticlephonon model. The coupling of a quasineutron with the 2+, 3? and 2? one-phonon core excitation is taken into account. Inclusion of all one-phonon 2? states up to 24 MeV in the wave functions of the excited states reduces the theoretical B(M2) values by 3–4 times as compared to the single-particle values. The specific B(M2) dependence on the mass number appears to be due to the pairing effect. |
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