PT Journal
AU Boso, Aea
   Gadea, A
   Huyuk, T
TI Neutron Skin Effects in Mirror Energy Differences: The Case of Mg-23-Na-23
SO Physical Review Letters
JI Phys. Rev. Lett.
PY 2018
BP 032502
EP 5pp
VL 121
IS 3
DI 10.1103/PhysRevLett.121.032502
LA English
AB Energy differences between analogue states in the T = 1/2 Mg-23-Na-23 mirror nuclei have been measured along the rotational yrast bands. This allows us to search for effects arising from isospin-symmetrybreaking interactions (ISB) and/or shape changes. Data are interpreted in the shell model framework following the method successfully applied to nuclei in the f(7/2) shell. It is shown that the introduction of a schematic ISB interaction of the same type of that used in the f(7/2) shell is needed to reproduce the data. An alternative novel description, applied here for the first time, relies on the use of an effective interaction deduced from a realistic charge-dependent chiral nucleon-nucleon potential. This analysis provides two important results: (i) The mirror energy differences give direct insight into the nuclear skin; (ii) the skin changes along the rotational bands are strongly correlated with the difference between the neutron and proton occupations of the s(1/2) "halo" orbit.
ER