ADAS Subroutine bxstkc

      SUBROUTINE BXSTKC( NDLEV  , NDMET  ,
     &                   NORD   , NMET   ,
     &                   IORDR  , IMETR  ,
     &                   CC     , STCK   ,
     &                   CRED
     &                 )
C-----------------------------------------------------------------------
C
C  ****************** FORTRAN77 SUBROUTINE: BXSTKC *********************
C
C  PURPOSE: TO STACK UP IN  'CRED'  THE TRANSITION RATE BETWEEN METASTA-
C           BLE LEVELS FOR A GIVEN TEMPERATURE STABLE LEVEL FOR A GIVEN
C           TEMPERATURE AND DENSITY.
C
C  CALLING PROGRAM:  ADAS205/ADAS206
C
C  SUBROUTINE:
C
C  INPUT :  (I*4)  NDLEV   = MAXIMUM NUMBER OF ENERGY LEVELS ALLOWED
C  INPUT :  (I*4)  NDMET   = MAXIMUM NUMBER OF METASTABLE LEVELS ALLOWED
C
C  INPUT :  (I*4)  NORD    = NUMBER OF ORDINARY EXCITED LEVELS
C  INPUT :  (I*4)  NMET    = NUMBER OF METASTABLE LEVELS
C
C  INPUT :  (I*4)  IMETR() = INDEX OF METASTABLE IN COMPLETE LEVEL LIST
C                            (ARRAY SIZE = 'NDMET' )
C  INPUT :  (I*4)  IORDR() =INDEX OF ORDINARY EXCITED LEVELS IN COMPLETE
C                            LEVEL LIST.
C                            (ARRAY SIZE = 'NDLEV' )
C
C  INPUT :  (R*8)  CC(,)   = RATE MATRIX COVERING ALL TRANSITIONS
C                            (UNITS: SEC-1)
C                            VALUES FOR GIVEN TEMPERATURE AND DENSITY.
C                            1st DIMENSION: ENERGY LEVEL INDEX
C                            2nd DIMENSION: ENERGY LEVEL INDEX
C  INPUT :  (R*4)  STCK(,) = POPULATION MATRIX COVERING ALL NON-METAST-
C                            ABLE/ORDINARY EXCITED LEVELS AS FUNCTION
C                            OF METASTABLE INDEX.
C                            VALUES FOR GIVEN TEMPERATURE AND DENSITY.
C                            1st DIMENSION: ORDINARY EXCITED LEVEL INDEX
C                            2nd DIMENSION: METASTABLE LEVEL INDEX
C
C  OUTPUT:  (R*8)  CRED(,) = MATRIX  OF  TRANSITION   RATES   BETWEEN
C                            METASTABLE LEVELS.
C                            (UNITS: SEC-1)
C                            VALUES FOR GIVEN TEMPERATURE AND DENSITY.
C                            1st DIMENSION: METASTABLE LEVEL INDEX
C                            2nd DIMENSION: METASTABLE LEVEL INDEX
C
C           (I*4)  IM1     = METASTABLE LEVEL ARRAY INDEX
C           (I*4)  IM2     = METASTABLE LEVEL ARRAY INDEX
C           (I*4)  IS      = ORDINARY EXCITED LEVEL INDEX
C
C
C ROUTINES: NONE
C
C NOTE:
C           CRED(IM1,IM2) = ( the transition rate from IM2 to IM1 )
C                                              +
C                           SUM( (the transistion rate from ordinary
C                                 level IS to IM1)  x (the population
C                                 in metastable level IM2 that excite
C                                 to oridinary level IS) )
C
C                           ABOVE SUM IS OVER ALL ORDINARY LEVELS.
C
C
C AUTHOR:  PAUL E. BRIDEN (TESSELLA SUPPORT SERVICES PLC)
C          K1/0/81
C          JET EXT. 4569
C
C DATE:    09/10/90
C
C UPDATE:  20/05/93 - P BRIDEN: STCK ARRAY CHANGED FROM REAL*8 -> REAL*4
C
C-----------------------------------------------------------------------
C
C-----------------------------------------------------------------------
      INTEGER             IMETR(NDMET),             IORDR(NDLEV)
      INTEGER             NDLEV,       NDMET,       NMET,        NORD
      REAL*8              CC(NDLEV,NDLEV),          CRED(NDMET,NDMET)
      REAL                STCK(NDLEV,NDMET)