The breakup reaction of neutron rich nucleus 17 N on 197 Au and 9 Be targets has been measured at RIBLL (Radioactive Ion Beam Line at Lanzhou). The product yields and the cross sections of charged particles in pair at forward angles were measured with the 14 unit detector array. The detection efficiency of the detector system was corrected by using Monte Carlo method. The breakup cross sections show that the ratio of the breakup cross section on 197 Au to 9 Be is 4—5. The cross se...