  Shell model calculations have been done for interpreting two representative
isomeric states in neutron rich $^{132}Sn$ region using SMN and SMPN
Hamiltonians. They are, (i) 2.91 min isomer in $^{138}Cs$ and (ii) the 0.57
$\mu s$ isomer in $^{136}$Sb nuclei. The results are compared with those
obtained with KH5082 and CW5082 Hamiltonians. How the results clearly
distinguish the most appropriate interaction has been discussed.
