Tuesday, July 9, 2013

1307.2044 (J. Li et al.)

Relativistic description of magnetic moments in nuclei with doubly
closed shells plus or minus one nucleon

J. Li, J. X. Wei, J. N. Hu, P. Ring, J. Meng
Using the relativistic point-coupling model with density functional PC-PK1, the magnetic moments of the nuclei $^{207}$Pb, $^{209}$Pb, $^{207}$Tl and $^{209}$Bi with a $jj$ closed-shell core $^{208}$Pb are studied on the basis of relativistic mean field (RMF) theory. The corresponding time-odd fields, the one-pion exchange currents, and the first- and second-order corrections are taken into account. The present relativistic results reproduce the data well. The relative deviation between theory and experiment for these four nuclei is 6.1% for the relativistic calculations and somewhat smaller than the value of 13.2% found in earlier non-relativistic investigations. It turns out that the $\pi$ meson is important for the description of magnetic moments, first by means of one-pion exchange currents and second by the residual interaction provided by the $\pi$ exchange.
View original: http://arxiv.org/abs/1307.2044

No comments:

Post a Comment