JAEA-Conf 2011-002 - 日本原子力研究開発機構

3. Nuclear Theory Laboratory
JAEA-Conf 2011-002
The laboratory is within the Theoretical and Mathematical Physics Division. The main
topics of scientific interest of the 15 members of the Nuclear Theory Laboratory include:
nucleon-nucleon correlation effects on nuclear structure and reactions
symmetries in nuclear physics
algebraic methods in nuclear theory
exotic nuclei and few-body systems
advanced studies of many-fermion systems.
In the period 2004-2008 the laboratory members have published 65 papers in journals
abroad (Physical Review C, Physics Letters B, Journal of Physics G, Physical Review Letters,
Physics of Atomic Nuclei, International Journal of Modern Physics E, International Journal of
Quantum Chemistry, Progress of Theoretical Chemistry and Physics, European Physical
Journal A and others), 9 papers in Bulgarian journals, 26 papers in conference proceedings
abroad and 45 papers in conference proceedings in Bulgaria. In the same period the obtained
results were partly supported by Contracts -905, -1416, -1501, -1502 and DO 02-285
with the National Science Fund. The laboratory keeps very active international collaborations
with GSI (Darmstadt) (Project ELISe), University of Giessen, N.C.S.R. “Demokritos”,
University of Tübingen, the Royal Society in London, University of Oxford, CSIC and
Complutense University of Madrid, University of Seville, Kyushu University, INFN, Italy
(Perugia), University of Pavia, University ot Torino, University of Naples, CNRS, Paris,
JINR, Dubna, University of Thessaloniki and University of Lousiana.
In the next two figures some results of investigations, namely devoted to neutron skin
emergence in exotic nuclei [1] and superscaling phenomenon of inclusive lepton scattering [2]
are presented. The differences between the rms of neutrons and protons rnp=rn-rp are plotted
in Fig. 1. On the left panel our results for Sn isotopes are shown and compared to relativistic
mean-field (RMF) results and to experimental data. As it can be seen the experimental data
are located between the predictions of both theoretical approaches and in general, there is
agreement with experiment within the error bars. On the right panels we see the predictions
for rnp in the cases of Ni and Kr isotopes, where there are no data. As it can be seen, the
RMF results for the difference rnp systematically overestimate the Skyrme HF results. The
reason for this is related to the difference in the nuclear symmetry energy and, consequently,
to the different neutron equation of state which has been extensively studied in recent years.
Fig. 1