Isomeric levels of nuclei near N = 40

The neutron rich nuclei near N = 40 and Z $<$ 28 challenge our theoretical understanding of shell structure in this region.~ As protons are removed from the f$_{7/2}$ single-particle state, rapid changes in collectivity are observed and attributed to the influence of the neutron g$_{9/2}$ intruder orbital. Even the removal of two protons between $^{68}$Ni and $^{66}$Fe gives rise to a large drop by 1460 keV for the energy of the first excited 2$^{+}$ state from which an increase in collectivity has been inferred. The gamma-ray decay of isomeric states near N = 40 were studied at the NSCL to investigate nuclear structure in this region.~ We report the low level structures that were confirmed for $^{64}$Mn and newly proposed for $^{66}$Mn and $^{64}$V.