PT Journal
AU Ljungvall, Jea
   Gadea, A
TI Onset of collectivity in neutron-rich Fe isotopes: Toward a new island of inversion?
SO Physical Review C
JI Phys. Rev. C
PY 2010
BP 061301
EP 4pp
VL 81
IS 6
DI 10.1103/PhysRevC.81.061301
LA English
AB The lifetimes of the first excited 2(+) states in Fe-62 and Fe-64 have been measured for the first time using the recoil-distance Doppler shift method after multinucleon transfer reactions in inverse kinematics. A sudden increase of collectivity from Fe-62 to Fe-64 is observed. The experimental results are compared with new large-scale shell-model calculations and Hartree-Fock-Bogolyubov-based configuration-mixing calculations using the Gogny D1S interaction. The results give a deeper understanding of the mechanism leading to an onset of collectivity near Ni-68, which is compared with the situation in the so-called island of inversion around Mg-32.
ER