Physical Review C, Nuclear physics
Author:
Keywords:
61Fe 9/2+ isomer, fusion-evaporation reactions, isomer g-factor, yrast decay schemes, projectile fragmentation, exotic nuclei, TDPAD, heavy-ion, neutron, polarization, deformation, nuclides, isotopes, fe-57, Science & Technology, Physical Sciences, Physics, Nuclear, Physics, YRAST DECAY SCHEMES, NEUTRON, POLARIZATION, DEFORMATION, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, 5106 Nuclear and plasma physics
Abstract:
This paper demonstrates the feasibility of quadrupole moment measurements on isomeric levels populated in projectile fragmentation reactions. The neutron-rich Fe-61(9/2(+)) [E-*= 861 keV, T-1/2= 239(5) ns] isomer was produced and spin aligned by the intermediate energy fragmentation of a Ni-64 beam and implanted in a Cd single crystal. Its spectroscopic quadrupole moment Q(s)=41(6) e fm(2) agrees with mean-field based calculations using the finite-range Gogny force, suggesting a moderately deformed shape characterized by an intrinsic charge quadrupole moment Q(0)=-85 e fm(2) or Q(0)=+115 e fm(2). The present measurement paves the way for future determinations of isomeric quadrupole moments in more exotic nuclei.