KO starting database : ORA-03113: end-of-file on communication channel

HEllo,
 I rename database  with nid, I change the name in spfile to new name of database, but when i start it failed :

 > startup
Total System Global Area 7482626048 bytes
Fixed Size                  2242912 bytes
Variable Size            1610614432 bytes
Database Buffers         5855248384 bytes
Redo Buffers               14520320 bytes
ORA-03113: end-of-file on communication channel
Process ID: 8373
Session ID: 673 Serial number:



in alert log file  :


        USER (ospid: 8512): terminating the instance
        System state dump requested by (instance=1, osid=8512), summary=[abnormal instance termination].
        System State dumped to trace file /u01/app/diag/rdbms/xxxx/xxxxxx/trace/xxxx_diag_8438.trc
        Dumping diagnostic data in directory=[cdmp_20131007182141], requested by (instance=1, osid=8512), summary=[abnormal instance termination].