Eur. Phys. J. A 13, 177-180 (2002)
Relativistic many-body theory with radioactive ion beams: Surface pion condensation
H. TokiResearch Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka, 567-0047, Japan
(Received: 1 May 2001 / Revised version: 30 June 2001)
Abstract
We critically review the present relativistic mean-field
theory from the viewpoint of missing pions. We introduce the
interesting experimental data on pionic states taken at RCNP.
These data seem to suggest the occurrence of pion condensation in
the nuclear surface. Qualitative discussion is made on the
consequence of surface pion condensation on Gamow-Teller
transitions and spin response functions and others. The
radioactive ion beams are the tools of studying the unstable
nuclei, which have extended nuclear surfaces. We shall start with
radioactive ion beams the nuclear surface science, which includes
the surface pion condensation as the important ingredient in
addition to spin-orbit splitting and surface pairing.
21.10.-k - Properties of nuclei; nuclear energy levels.
21.10.Hw - Spin, parity, and isobaric spin.
21.30.Fe - Forces in hadronic systems and effective interactions.
21.60.Jz - Hartree-Fock and random-phase approximations.
© Società Italiana di Fisica, Springer-Verlag 2002
