Relativistic chiral mean field model for finite nuclei

✍ Scribed by Yoko Ogawa; Hiroshi Toki

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 405 KB
• Volume: 860
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2011.04.015

✦ Synopsis

We present a method for proper treatment of pion-exchange interaction in the nuclear many-body problem in a relativistic chiral mean field (RCMF) model. The pionic correlation is expressed in 2-particle 2-hole (2p-2h) states in addition to the standard mean field state, to describe the full strength of pionic correlations. The effect of the short-range repulsion is included by way of the unitary correlation operator method (UCOM) for the central part of the pion-exchange interaction. We apply the RCMF model to 12 C and 16 O. The convergence of pionic energy contributions is realized with pionic quantum number J π up to 10 -for 12 C and 11 + for 16 O. The pion-exchange interaction gives the dominant contribution to the binding energy. The pion plays an important role in the formation of the jj -magic shell effect by way of the Pauli-blocking mechanism of the pion-exchange interaction. The lower pionic quantum numbers J π 3 + are the dominant components of the nuclear surface structure.