Using the information on the nuclear structure of exotic neutron-rich halo nucleus $^{ 11}$Be, we evaluate the parity violating anapole moment in its ground state. The resulting value $\kappa(^{ 11}$Be)$=0.17$ is fifteen times bigger than the typical value of the anapole moment of a normal nucleus of the same mass, and in fact exceeds by few times anapole moments of any known neutron-odd nuclei (e.g., kappa(^{ 11}Be) > 2|\kappa(^{ 207}Pb)|. It is also few times bigger than the neutral current contribution to the lepton-nucleus interaction.
Categories: nucl-th nucl-ex physics.atom-ph