1 | SUBROUTINE BREMS
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2 | C VERSION 4.00 -- 26 JAN 1986/1900
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3 | C******************************************************************
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4 | C FOR ELECTRON ENERGY GREATER THAN 5.0 MEV, THE BETHE-HEITLER
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5 | C CROSS SECTION IS EMPLOYED.
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6 | C******************************************************************
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7 | DOUBLE PRECISION PEIE,PESG,PESE
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8 | COMMON/BREMPR/DL1(6),DL2(6),DL3(6),DL4(6),DL5(6),DL6(6),DELCM, ALP
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9 | *HI(2),BPAR(2),DELPOS(2),PWR2I(50)
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10 | *KEEP,RANDPA.
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11 | COMMON /RANDPA/ FAC,U1,U2,RD,NSEQ,ISEED,KNOR
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12 | DOUBLE PRECISION FAC,U1,U2
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13 | REAL RD(3000)
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14 | INTEGER ISEED(103,10),NSEQ
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15 | LOGICAL KNOR
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16 | *KEEP,RUNPAR.
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17 | COMMON /RUNPAR/ FIXHEI,THICK0,HILOECM,HILOELB,
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18 | * STEPFC,NRRUN,NSHOW,PATAPE,MONIIN,
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19 | * MONIOU,MDEBUG,NUCNUC,
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20 | * CETAPE,
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21 | * SHOWNO,ISHW,NOPART,NRECS,NBLKS,MAXPRT,NDEBDL,
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22 | * N1STTR,MDBASE,
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23 | * DEBDEL,DEBUG,FDECAY,FEGS,FIRSTI,FIXINC,FIXTAR,
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24 | * FIX1I,FMUADD,FNKG,FPRINT,FDBASE
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25 | * ,GHEISH,GHESIG
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26 | COMMON /RUNPAC/ DSN,HOST,USER
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27 | DOUBLE PRECISION FIXHEI,THICK0,HILOECM,HILOELB
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28 | REAL STEPFC
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29 | INTEGER NRRUN,NSHOW,PATAPE,MONIIN,MONIOU,MDEBUG,NUCNUC,
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30 | * SHOWNO,ISHW,NOPART,NRECS,NBLKS,MAXPRT,NDEBDL,
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31 | * N1STTR,MDBASE
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32 | INTEGER CETAPE
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33 | CHARACTER*79 DSN
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34 | CHARACTER*20 HOST,USER
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35 |
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36 | LOGICAL DEBDEL,DEBUG,FDECAY,FEGS,FIRSTI,FIXINC,FIXTAR,
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37 | * FIX1I,FMUADD,FNKG,FPRINT,FDBASE
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38 | * ,GHEISH,GHESIG
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39 | *KEEP,STACKE.
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40 | COMMON/STACKE/ E,TIME,X,Y,Z,U,V,W,DNEAR,IQ,IGEN,IR,IOBS,LPCTE,NP
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41 | DOUBLE PRECISION E(60),TIME(60)
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42 | REAL X(60),Y(60),Z(60),U(60),V(60),W(60),DNEAR(60)
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43 | INTEGER IQ(60),IGEN(60),IR(60),IOBS(60),LPCTE(60),NP
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44 | *KEND.
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45 | COMMON/THRESH/RMT2,RMSQ,ESCD2,AP,API,AE,UP,UE,TE,THMOLL
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46 | COMMON/UPHIOT/THETA,SINTHE,COSTHE,SINPHI, COSPHI,PI,TWOPI,PI5D2
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47 | DOUBLE PRECISION PZERO,PRM,PRMT2,RMI,VC
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48 | COMMON/USEFUL/PZERO,PRM,PRMT2,RMI,VC,RM,MEDIUM,MEDOLD,IBLOBE,ICALL
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49 | COMMON/ACLOCK/NCLOCK,JCLOCK
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50 | DATA AI2LN2/0.7213475/
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51 | C_____IF (NCLOCK.GT.JCLOCK) THEN
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52 | C______WRITE(MDEBUG,* )' BREMS: NP=',NP,' IR=',IR(NP),' IOBS=',IOBS(NP)
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53 | C______CALL AUSGB2
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54 | C_____END IF
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55 | PEIE=E(NP)
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56 | EIE=PEIE
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57 | NP=NP+1
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58 | IF (EIE.LT.50.0) THEN
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59 | LVX=1
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60 | LVL0=0
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61 | ELSE
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62 | LVX=2
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63 | LVL0=3
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64 | END IF
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65 | ABREMS=REAL(IFIX(1.44269*ALOG(EIE*API)))
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66 | 351 CONTINUE
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67 | CALL RMMAR(RNNO06,1,2)
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68 | IF (0.5.LT.((ABREMS*ALPHI(LVX)+0.5)*RNNO06)) THEN
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69 | CALL RMMAR(RD,2,2)
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70 | RNNO07=RD(1)
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71 | RNNO08=RD(2)
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72 | IDISTR=ABREMS*RNNO07
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73 | P=PWR2I(IDISTR+1)
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74 | LVL=LVL0+1
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75 | IF (RNNO08.GE.AI2LN2) THEN
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76 | 361 CONTINUE
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77 | CALL RMMAR(RD,3,2)
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78 | RNNO09=RD(1)
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79 | RNNO10=RD(2)
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80 | RNNO11=RD(3)
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81 | H=MAX(RNNO10,RNNO11)
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82 | BR=1.0-0.5*H
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83 | IF((BR*RNNO09.LE.0.5))GO TO362
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84 | GO TO 361
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85 | 362 CONTINUE
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86 | ELSE
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87 | CALL RMMAR(RNNO12,1,2)
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88 | BR=RNNO12*0.5
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89 | END IF
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90 | BR=BR*P
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91 | ELSE
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92 | CALL RMMAR(RD,2,2)
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93 | RNNO13=RD(1)
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94 | RNNO14=RD(2)
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95 | BR=MAX(RNNO13,RNNO14)
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96 | LVL=LVL0+2
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97 | END IF
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98 | ESG=EIE*BR
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99 | IF((ESG.LT.AP))GO TO351
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100 | PESG=ESG
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101 | PESE=PEIE-PESG
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102 | ESE=PESE
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103 | IF((ESE.LT.RM))GO TO351
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104 | DEL = BR/ESE
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105 | IF((DEL.GE.DELPOS(LVX)))GO TO351
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106 | DELTA = DELCM*DEL
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107 | IF (DELTA.LT.1.0) THEN
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108 | REJF=DL1(LVL)+DELTA*(DL2(LVL)+DELTA*DL3(LVL))
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109 | ELSE
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110 | REJF=DL4(LVL)+DL5(LVL)*LOG(DELTA+DL6(LVL))
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111 | END IF
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112 | CALL RMMAR(RNSCRN,1,2)
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113 | IF((RNSCRN.LE.REJF))GO TO352
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114 | GO TO 351
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115 | 352 CONTINUE
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116 | THETA=RM/EIE
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117 | CALL UPHI(1,3)
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118 | IF (ESG.LE.ESE) THEN
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119 | IQ(NP)=1
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120 | E(NP)=PESG
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121 | E(NP-1)=PESE
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122 | ELSE
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123 | IQ(NP)=IQ(NP-1)
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124 | IQ(NP-1)=1
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125 | E(NP)=PESE
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126 | E(NP-1)=PESG
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127 | T=U(NP)
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128 | U(NP)=U(NP-1)
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129 | U(NP-1)=T
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130 | T=V(NP)
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131 | V(NP)=V(NP-1)
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132 | V(NP-1)=T
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133 | T=W(NP)
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134 | W(NP)=W(NP-1)
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135 | W(NP-1)=T
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136 | END IF
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137 | RETURN
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138 | END
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