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GAMESS可以算CASSCF的振子强度,看手册$transt部分。
一个例子:
$CONTRL
SCFTYP=NONE RUNTYP=transitn cityp=guga NOSYM=1
MULT=1 ISPHER=1 COORD=UNIQUE
$END
$SYSTEM TIMLIM=6000 MEMDDI=500 MWORDS=100 $END
$DRT1 GROUP=C1 FORS=.TRUE. nfzc=*core orbitals* NDOC=*doubly occupied MOs in the reference* NVAL=*empty MOs in the reference* $END
$GUGDIA ITERMX=600 NSTATE=4 $END
$transt nfzc=*core orbitals* nocc=*occupied orbitals* iroots(1)=4 nstate=10 $end
$BASIS GBASIS=*** EXTFIL=.TRUE. $END
$GUESS
GUESS=MOREAD NORB=***
$END
$DATA
***some comments***
C1
***coordinate***
$END
$VEC1
***OPTIMIZED MCSCF MO-S***
$END
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