  A so-called "two-step reaction scheme", in which neutron-rich rare isotopes
obtained from ISOL are post-accelerated and bombarded on a second target, is
employed to estimate the production yields of exotic rare isotopes. The
production yields of neutron-rich rare isotope fragments induced by 200 MeV/u
$^{132}$Sn beams bombarded on a $^{9}$Be target are estimated with Monte Carlo
code, GEANT4. To substantiate the use of GEANT4 for this study, benchmark
calculations are done for 80 MeV/u $^{59}$Co, 95 MeV/u $^{72}$Zn, 500 MeV/u
$^{92}$Mo, and 950 MeV/u $^{132}$Sn beams on the $^{9}$Be target. It is found
that $^{132}$Sn beams can produce neutron-rich rare isotopes with 45 $\leq$ Z
$\leq$ 50 more effectively than $^{238}$U beams at the same energy per nucleon.
