ADAS Subroutine photo2

      SUBROUTINE PHOTO2(PION,PREC,PSTIM,CREC,ZZ,TE,TP,N1,L1,LT1,E1,V1,
     1KPION,KPREC,KPSTIM,CUT,IOPT,C1,C2,C3)
C---------------------------------------------------------------------
C
C	********** FORTRAN 77 ROUTINE : PHOTO2 **********
C
C	PURPOSE : EVALUATES PHOTO IONISATION, STIMULATED
C		  AND RADIATIVE RECOMBINATION RATES.
C
C	NOTE    : THE INTEGRALS INVOLVING THE BOUND-FREE
C		  GAUNT FACTOR ARE EVALUATED USING A
C		  COMBINATION OF LAGUERRE AND GUASSIAN
C		  QUADRATURE.
C
C	HISTORY : ROUTINE WAS ORIGINALLY WRITTEN BY
C		  H.P.SUMMERS.
C
C	CONTACT : HARVEY ANDERSON
C		  UNIVERSITY OF STRATHCLYDE
C		  ANDERSON@PHYS.STRATH.AC.UK
C
C	DATE    : 5/2/98
C
C---------------------------------------------------------------------
C
C   CHANGE TO PHOTO2 ON 17/11/83 AND GPRT=GPRT1=0
       IMPLICIT REAL*8(A-H,O-Z)
      INTEGER             IOPT,        KPION,       KPREC,       KPSTIM
      INTEGER             L1,          LT1,         N1
      REAL*8              C1(5,5,3),   C2(5,5,3),   C3(5,5,3),   CREC
      REAL*8              CUT,         E1,          PION,        PREC
      REAL*8              PSTIM,       TE,          TP,          V1
      REAL*8              ZZ