| 1 | SUBROUTINE MOLLER
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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 DISCRETE MOLLER SCATTERING (A CALL TO THIS ROUTINE) HAS BEEN
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| 5 | C ARBITRARILY DEFINED AND CALCULATED TO MEAN MOLLER SCATTERINGS
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| 6 | C WHICH IMPART TO THE SECONDARY ELECTRON SUFFICIENT ENERGY THAT
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| 7 | C IT BE TRANSPORTED DISCRETELY. THE THRESHOLD TO TRANSPORT AN
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| 8 | C ELECTRON DISCRETELY IS A TOTAL ENERGY OF AE OR A KINETIC ENERGY
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| 9 | C OF TE=AE-RM. SINCE THE KINETIC ENERGY TRANSFER IS ALWAYS, BY
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| 10 | C DEFINITION, LESS THAN HALF OF THE INCIDENT KINETIC ENERGY, THIS
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| 11 | C IMPLIES THAT THE INCIDENT ENERGY, EIE, MUST BE LARGER THAN
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| 12 | C THMOLL=TE*2+RM. THE REST OF THE COLLISION CONTRIBUTION IS
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| 13 | C SUBTRACTED CONTINUOUSLY FROM THE ELECTRON AS IONIZATION
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| 14 | C LOSS DURING TRANSPORT.
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| 15 | C******************************************************************
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| 16 | DOUBLE PRECISION PEIE,PEKSE2,PESE1,PESE2
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| 17 | DOUBLE PRECISION PEKIN,H1,DCOSTH,PEKINI
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| 18 | *KEEP,RANDPA.
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| 19 | COMMON /RANDPA/ FAC,U1,U2,RD,NSEQ,ISEED,KNOR
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| 20 | DOUBLE PRECISION FAC,U1,U2
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| 21 | REAL RD(3000)
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| 22 | INTEGER ISEED(103,10),NSEQ
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| 23 | LOGICAL KNOR
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| 24 | *KEEP,RUNPAR.
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| 25 | COMMON /RUNPAR/ FIXHEI,THICK0,HILOECM,HILOELB,
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| 26 | * STEPFC,NRRUN,NSHOW,PATAPE,MONIIN,
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| 27 | * MONIOU,MDEBUG,NUCNUC,
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| 28 | * CETAPE,
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| 29 | * SHOWNO,ISHW,NOPART,NRECS,NBLKS,MAXPRT,NDEBDL,
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| 30 | * N1STTR,MDBASE,
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| 31 | * DEBDEL,DEBUG,FDECAY,FEGS,FIRSTI,FIXINC,FIXTAR,
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| 32 | * FIX1I,FMUADD,FNKG,FPRINT,FDBASE
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| 33 | * ,GHEISH,GHESIG
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| 34 | COMMON /RUNPAC/ DSN,HOST,USER
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| 35 | DOUBLE PRECISION FIXHEI,THICK0,HILOECM,HILOELB
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| 36 | REAL STEPFC
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| 37 | INTEGER NRRUN,NSHOW,PATAPE,MONIIN,MONIOU,MDEBUG,NUCNUC,
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| 38 | * SHOWNO,ISHW,NOPART,NRECS,NBLKS,MAXPRT,NDEBDL,
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| 39 | * N1STTR,MDBASE
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| 40 | INTEGER CETAPE
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| 41 | CHARACTER*79 DSN
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| 42 | CHARACTER*20 HOST,USER
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| 43 |
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| 44 | LOGICAL DEBDEL,DEBUG,FDECAY,FEGS,FIRSTI,FIXINC,FIXTAR,
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| 45 | * FIX1I,FMUADD,FNKG,FPRINT,FDBASE
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| 46 | * ,GHEISH,GHESIG
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| 47 | *KEEP,STACKE.
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| 48 | COMMON/STACKE/ E,TIME,X,Y,Z,U,V,W,DNEAR,IQ,IGEN,IR,IOBS,LPCTE,NP
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| 49 | DOUBLE PRECISION E(60),TIME(60)
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| 50 | REAL X(60),Y(60),Z(60),U(60),V(60),W(60),DNEAR(60)
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| 51 | INTEGER IQ(60),IGEN(60),IR(60),IOBS(60),LPCTE(60),NP
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| 52 | *KEND.
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| 53 | COMMON/THRESH/RMT2,RMSQ,ESCD2,AP,API,AE,UP,UE,TE,THMOLL
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| 54 | COMMON/UPHIOT/THETA,SINTHE,COSTHE,SINPHI, COSPHI,PI,TWOPI,PI5D2
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| 55 | DOUBLE PRECISION PZERO,PRM,PRMT2,RMI,VC
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| 56 | COMMON/USEFUL/PZERO,PRM,PRMT2,RMI,VC,RM,MEDIUM,MEDOLD,IBLOBE,ICALL
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| 57 | COMMON/ACLOCK/NCLOCK,JCLOCK
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| 58 | C_____IF (NCLOCK.GT.JCLOCK) THEN
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| 59 | C______WRITE(MDEBUG,* )' MOLLER:NP=',NP,' IR=',IR(NP),' IOBS=',IOBS(NP)
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| 60 | C______CALL AUSGB2
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| 61 | C_____END IF
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| 62 | PEIE=E(NP)
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| 63 | EIE=PEIE
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| 64 | PEKIN=PEIE-PRM
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| 65 | EKIN=PEKIN
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| 66 | PEKINI=1./PEKIN
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| 67 | EKINI=PEKINI
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| 68 | T0=EKIN*RMI
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| 69 | E0=T0+1.0
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| 70 | EXTRAE = EIE - THMOLL
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| 71 | E02=E0*E0
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| 72 | BETAI2=E02/(E02-1.0)
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| 73 | EP0=TE*EKINI
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| 74 | G1=(1.-2.*EP0)*BETAI2
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| 75 | G2=T0*T0*(1./E02)
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| 76 | G3=(2.*T0+1.)*(1./E02)
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| 77 | 931 CONTINUE
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| 78 | CALL RMMAR(RD,2,2)
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| 79 | RNNO27=RD(1)
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| 80 | RNNO28=RD(2)
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| 81 | BR = TE/(EKIN-EXTRAE*RNNO27)
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| 82 | R=BR/(1.-BR)
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| 83 | REJF4=G1*(1.+G2*BR*BR+R*(R-G3))
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| 84 | IF((RNNO28.LE.REJF4))GO TO932
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| 85 | GO TO 931
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| 86 | 932 CONTINUE
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| 87 | PEKSE2=BR*EKIN
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| 88 | PESE1=PEIE-PEKSE2
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| 89 | PESE2=PEKSE2+PRM
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| 90 | E(NP)=PESE1
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| 91 | E(NP+1)=PESE2
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| 92 | H1=(PEIE+PRM)*PEKINI
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| 93 | DCOSTH=MIN(H1*(PESE1-PRM)/(PESE1+PRM),1.D0)
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| 94 | SINTHE=SQRT(1.D0-DCOSTH)
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| 95 | COSTHE=SQRT(DCOSTH)
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| 96 | CALL UPHI(2,1)
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| 97 | NP=NP+1
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| 98 | IQ(NP)=3
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| 99 | DCOSTH=MIN(H1*(PESE2-PRM)/(PESE2+PRM),1.D0)
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| 100 | SINTHE=-SQRT(1.D0-DCOSTH)
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| 101 | COSTHE=SQRT(DCOSTH)
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| 102 | CALL UPHI(3,2)
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| 103 | RETURN
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| 104 | END
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