Nuclear structure study with core excitations in Ni region: for   $fpg_{9/2}$ space
  Shell model calculations for Ni, Cu and Zn isotopes by modifying $fpg$ interaction due to Sorlin {\it et. al.,} [Phys. Rev. Lett. 88, 092501 (2002)] have been reported. In the present work 28 two body matrix elements of the earlier interaction have been modified. Present interaction is able to explain new experimental results for this region. 
P.C. Srivastava
nucl-th