| 1 | SUBROUTINE TARINT
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| 2 |
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| 3 | C-----------------------------------------------------------------------
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| 4 | C TAR(GET) INT(ERACTIONS)
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| 5 | C
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| 6 | C ROUTINE DETERMINES HOW MANY INTERACTIONS OCCUR IN TARGET
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| 7 | C THIS SUBROUTINE IS CALLED FROM HDPM
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| 8 | C-----------------------------------------------------------------------
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| 9 |
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| 10 | IMPLICIT DOUBLE PRECISION (A-H,O-Z)
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| 11 | *KEEP,DPMFLG.
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| 12 | COMMON /DPMFLG/ NFLAIN,NFLDIF,NFLPI0,NFLCHE,NFLPIF,NFRAGM
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| 13 | INTEGER NFLAIN,NFLDIF,NFLPI0,NFLCHE,NFLPIF,NFRAGM
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| 14 | *KEEP,GNUPR.
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| 15 | COMMON /GNUPR/ SE14,SE16,SE40
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| 16 | DOUBLE PRECISION SE14(3,14),SE16(3,16),SE40(3,40)
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| 17 | *KEEP,INTER.
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| 18 | COMMON /INTER/ AVCH,AVCH3,DC0,DLOG,DMLOG,ECMDIF,ECMDPM,ELAB,
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| 19 | * FNEUT,FNEUT2,GNU,PLAB,POSC2,POSC3,POSN2,POSN3,
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| 20 | * RC3TO2,S,SEUGF,SEUGP,SLOG,SLOGSQ,SMLOG,
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| 21 | * WIDC2,WIDC3,WIDN2,WIDN3,YCM,YY0,ZN,
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| 22 | * IDIF,ITAR
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| 23 | DOUBLE PRECISION AVCH,AVCH3,DC0,DLOG,DMLOG,ECMDIF,ECMDPM,ELAB,
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| 24 | * FNEUT,FNEUT2,GNU,PLAB,POSC2,POSC3,POSN2,POSN3,
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| 25 | * RC3TO2,S,SEUGF,SEUGP,SLOG,SLOGSQ,SMLOG,
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| 26 | * WIDC2,WIDC3,WIDN2,WIDN3,YCM,YY0,ZN
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| 27 | INTEGER IDIF,ITAR
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| 28 | *KEEP,PARPAR.
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| 29 | COMMON /PARPAR/ CURPAR,SECPAR,PRMPAR,OUTPAR,C,
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| 30 | * E00,E00PN,PTOT0,PTOT0N,THICKH,ITYPE,LEVL
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| 31 | DOUBLE PRECISION CURPAR(14),SECPAR(14),PRMPAR(14),OUTPAR(14),
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| 32 | * C(50),E00,E00PN,PTOT0,PTOT0N,THICKH
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| 33 | INTEGER ITYPE,LEVL
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| 34 | *KEEP,RANDPA.
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| 35 | COMMON /RANDPA/ FAC,U1,U2,RD,NSEQ,ISEED,KNOR
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| 36 | DOUBLE PRECISION FAC,U1,U2
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| 37 | REAL RD(3000)
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| 38 | INTEGER ISEED(103,10),NSEQ
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| 39 | LOGICAL KNOR
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| 40 | *KEEP,REST.
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| 41 | COMMON /REST/ CONTNE,TAR,LT
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| 42 | DOUBLE PRECISION CONTNE(3),TAR
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| 43 | INTEGER LT
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| 44 | *KEEP,RUNPAR.
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| 45 | COMMON /RUNPAR/ FIXHEI,THICK0,HILOECM,HILOELB,
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| 46 | * STEPFC,NRRUN,NSHOW,PATAPE,MONIIN,
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| 47 | * MONIOU,MDEBUG,NUCNUC,
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| 48 | * CETAPE,
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| 49 | * SHOWNO,ISHW,NOPART,NRECS,NBLKS,MAXPRT,NDEBDL,
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| 50 | * N1STTR,MDBASE,
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| 51 | * DEBDEL,DEBUG,FDECAY,FEGS,FIRSTI,FIXINC,FIXTAR,
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| 52 | * FIX1I,FMUADD,FNKG,FPRINT,FDBASE
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| 53 | * ,GHEISH,GHESIG
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| 54 | COMMON /RUNPAC/ DSN,HOST,USER
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| 55 | DOUBLE PRECISION FIXHEI,THICK0,HILOECM,HILOELB
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| 56 | REAL STEPFC
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| 57 | INTEGER NRRUN,NSHOW,PATAPE,MONIIN,MONIOU,MDEBUG,NUCNUC,
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| 58 | * SHOWNO,ISHW,NOPART,NRECS,NBLKS,MAXPRT,NDEBDL,
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| 59 | * N1STTR,MDBASE
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| 60 | INTEGER CETAPE
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| 61 | CHARACTER*79 DSN
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| 62 | CHARACTER*20 HOST,USER
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| 63 |
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| 64 | LOGICAL DEBDEL,DEBUG,FDECAY,FEGS,FIRSTI,FIXINC,FIXTAR,
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| 65 | * FIX1I,FMUADD,FNKG,FPRINT,FDBASE
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| 66 | * ,GHEISH,GHESIG
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| 67 | *KEEP,SIGM.
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| 68 | COMMON /SIGM/ SIGMA,SIGANN,SIGAIR,FRACTN,FRCTNO
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| 69 | DOUBLE PRECISION SIGMA,SIGANN,SIGAIR,FRACTN,FRCTNO
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| 70 | *KEND.
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| 71 |
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| 72 | C-----------------------------------------------------------------------
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| 73 |
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| 74 | IF ( DEBUG ) WRITE(MDEBUG,*) 'TARINT: ITYPE,TAR,NFLAIN',
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| 75 | * ITYPE,SNGL(TAR),NFLAIN
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| 76 |
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| 77 | C NFLAIN EQUAL 0 : NUMBER OF INTERACTIONS IN TARGET CHOSEN RANDOMLY
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| 78 | IF ( NFLAIN .EQ. 0 ) THEN
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| 79 | C SIGMA IS ALREADY CALCULATED IN BOX2
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| 80 | DELSIG = SIGMA - 45.D0
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| 81 | DSIGSQ = DELSIG**2
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| 82 |
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| 83 | C CHOOSE RANDOM NUMBER
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| 84 | CALL RMMAR( RD,1,1 )
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| 85 | IF ( DEBUG ) WRITE(MDEBUG,*)'TARINT: DELSIG,DSIGSQ,RD(1),TAR=',
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| 86 | * SNGL(DELSIG),SNGL(DSIGSQ),RD(1),SNGL(TAR)
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| 87 |
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| 88 | C DO INTERACTION WITH CHOSEN TARGET ( N, O, AR )
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| 89 | PROB = 0.D0
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| 90 | C TREAT INTERACTION WITH NITROGEN TARGET
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| 91 | IF ( TAR .EQ. 14.D0 ) THEN
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| 92 | C SUM OF PROBABILITIES FOR COLLISION WITH NITROGEN TARGET
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| 93 | DO 6151 JL = 1,14
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| 94 | PROB = PROB +
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| 95 | * SE14(1,JL) + SE14(2,JL)*DELSIG + SE14(3,JL)*DSIGSQ
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| 96 | IF ( RD(1) .LE. PROB ) GOTO 7332
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| 97 | 6151 CONTINUE
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| 98 |
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| 99 | C TREAT INTERACTION WITH OXYGEN TARGET
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| 100 | ELSEIF ( TAR .EQ. 16.D0 ) THEN
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| 101 | C SUM OF PROBABILITIES FOR COLLISION WITH OXYGEN TARGET
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| 102 | DO 6152 JL = 1,16
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| 103 | PROB = PROB +
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| 104 | * SE16(1,JL) + SE16(2,JL)*DELSIG + SE16(3,JL)*DSIGSQ
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| 105 | IF ( RD(1) .LE. PROB ) GOTO 7332
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| 106 | 6152 CONTINUE
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| 107 |
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| 108 | C TREAT INTERACTION WITH ARGON TARGET
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| 109 | ELSEIF ( TAR .EQ. 40.D0 ) THEN
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| 110 | C SUM OF PROBABILITIES FOR COLLISION WITH ARGON TARGET
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| 111 | DO 6153 JL = 1,40
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| 112 | PROB = PROB +
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| 113 | * SE40(1,JL) + SE40(2,JL)*DELSIG + SE40(3,JL)*DSIGSQ
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| 114 | IF ( RD(1) .LE. PROB ) GOTO 7332
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| 115 | 6153 CONTINUE
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| 116 | ELSE
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| 117 | WRITE(MONIOU,*) 'TARINT: UNKNOWN TARGET = ',SNGL(TAR)
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| 118 | ENDIF
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| 119 | JL = 1
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| 120 |
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| 121 | C NUMBER OF COLLISIONS IN TARGET
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| 122 | 7332 CONTINUE
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| 123 | GNU = DBLE(JL)
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| 124 |
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| 125 | ELSE
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| 126 | C NFLAIN EQUAL 1 : AVERAGE NUMBER OF INTERACTIONS IN TARGET IS TAKEN
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| 127 | C NEW PARAMETRIZATION OF J.N.CAPDEVIELLE (MARCH 93)
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| 128 | GNU = (0.4826D0 + 3.522D-2 * SLOG) * TAR**0.31D0
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| 129 | ENDIF
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| 130 | IF ( DEBUG ) WRITE(MDEBUG,*)
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| 131 | * 'TARINT: # COLLISIONS IN TARGET=',SNGL(GNU)
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| 132 |
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| 133 | RETURN
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| 134 | END
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