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hijcsc.f
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hijcsc.f
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C
C*******************************************************************
C This subroutine performs elastic scatterings and possible
C elastic cascading within their own nuclei
c*******************************************************************
SUBROUTINE HIJCSC(JP,JT)
DIMENSION PSC1(5),PSC2(5)
COMMON/HIJCRDN/YP(3,300),YT(3,300)
SAVE /HIJCRDN/
COMMON/HIPARNT/HIPR1(100),IHPR2(50),HINT1(100),IHNT2(50)
SAVE /HIPARNT/
COMMON/RANSEED/NSEED
SAVE /RANSEED/
COMMON/HISTRNG/NFP(300,15),PP(300,15),NFT(300,15),PT(300,15)
SAVE /HISTRNG/
IF(JP.EQ.0 .OR. JT.EQ.0) GO TO 25
DO 10 I=1,5
PSC1(I)=PP(JP,I)
PSC2(I)=PT(JT,I)
10 CONTINUE
CALL HIJELS(PSC1,PSC2)
DPP1=PSC1(1)-PP(JP,1)
DPP2=PSC1(2)-PP(JP,2)
DPT1=PSC2(1)-PT(JT,1)
DPT2=PSC2(2)-PT(JT,2)
PP(JP,6)=PP(JP,6)+DPP1/2.0
PP(JP,7)=PP(JP,7)+DPP2/2.0
PP(JP,8)=PP(JP,8)+DPP1/2.0
PP(JP,9)=PP(JP,9)+DPP2/2.0
PT(JT,6)=PT(JT,6)+DPT1/2.0
PT(JT,7)=PT(JT,7)+DPT2/2.0
PT(JT,8)=PT(JT,8)+DPT1/2.0
PT(JT,9)=PT(JT,9)+DPT2/2.0
DO 20 I=1,4
PP(JP,I)=PSC1(I)
PT(JT,I)=PSC2(I)
20 CONTINUE
NFP(JP,5)=MAX(1,NFP(JP,5))
NFT(JT,5)=MAX(1,NFT(JT,5))
C ********Perform elastic scattering between JP and JT
RETURN
C ********The following is for possible elastic cascade
c
25 IF(JP.EQ.0) GO TO 45
PABS=SQRT(PP(JP,1)**2+PP(JP,2)**2+PP(JP,3)**2)
BX=PP(JP,1)/PABS
BY=PP(JP,2)/PABS
BZ=PP(JP,3)/PABS
DO 40 I=1,IHNT2(1)
IF(I.EQ.JP) GO TO 40
DX=YP(1,I)-YP(1,JP)
DY=YP(2,I)-YP(2,JP)
DZ=YP(3,I)-YP(3,JP)
DIS=DX*BX+DY*BY+DZ*BZ
IF(DIS.LE.0) GO TO 40
BB=DX**2+DY**2+DZ**2-DIS**2
R2=BB*HIPR1(40)/HIPR1(31)/0.1
C ********mb=0.1*fm, YP is in fm,HIPR1(31) is in mb
GS=1.0-EXP(-(HIPR1(30)+HINT1(11))/HIPR1(31)/2.0
& *ROMG(R2))**2
GS0=1.0-EXP(-(HIPR1(30)+HINT1(11))/HIPR1(31)/2.0
& *ROMG(0.0))**2
IF(ATL_RAN(NSEED).GT.GS/GS0) GO TO 40
DO 30 K=1,5
PSC1(K)=PP(JP,K)
PSC2(K)=PP(I,K)
30 CONTINUE
CALL HIJELS(PSC1,PSC2)
DPP1=PSC1(1)-PP(JP,1)
DPP2=PSC1(2)-PP(JP,2)
DPT1=PSC2(1)-PP(I,1)
DPT2=PSC2(2)-PP(I,2)
PP(JP,6)=PP(JP,6)+DPP1/2.0
PP(JP,7)=PP(JP,7)+DPP2/2.0
PP(JP,8)=PP(JP,8)+DPP1/2.0
PP(JP,9)=PP(JP,9)+DPP2/2.0
PP(I,6)=PP(I,6)+DPT1/2.0
PP(I,7)=PP(I,7)+DPT2/2.0
PP(I,8)=PP(I,8)+DPT1/2.0
PP(I,9)=PP(I,9)+DPT2/2.0
DO 35 K=1,5
PP(JP,K)=PSC1(K)
PP(I,K)=PSC2(K)
35 CONTINUE
NFP(I,5)=MAX(1,NFP(I,5))
GO TO 45
40 CONTINUE
45 IF(JT.EQ.0) GO TO 80
50 PABS=SQRT(PT(JT,1)**2+PT(JT,2)**2+PT(JT,3)**2)
BX=PT(JT,1)/PABS
BY=PT(JT,2)/PABS
BZ=PT(JT,3)/PABS
DO 70 I=1,IHNT2(3)
IF(I.EQ.JT) GO TO 70
DX=YT(1,I)-YT(1,JT)
DY=YT(2,I)-YT(2,JT)
DZ=YT(3,I)-YT(3,JT)
DIS=DX*BX+DY*BY+DZ*BZ
IF(DIS.LE.0) GO TO 70
BB=DX**2+DY**2+DZ**2-DIS**2
R2=BB*HIPR1(40)/HIPR1(31)/0.1
C ********mb=0.1*fm, YP is in fm,HIPR1(31) is in mb
GS=(1.0-EXP(-(HIPR1(30)+HINT1(11))/HIPR1(31)/2.0
& *ROMG(R2)))**2
GS0=(1.0-EXP(-(HIPR1(30)+HINT1(11))/HIPR1(31)/2.0
& *ROMG(0.0)))**2
IF(ATL_RAN(NSEED).GT.GS/GS0) GO TO 70
DO 60 K=1,5
PSC1(K)=PT(JT,K)
PSC2(K)=PT(I,K)
60 CONTINUE
CALL HIJELS(PSC1,PSC2)
DPP1=PSC1(1)-PT(JT,1)
DPP2=PSC1(2)-PT(JT,2)
DPT1=PSC2(1)-PT(I,1)
DPT2=PSC2(2)-PT(I,2)
PT(JT,6)=PT(JT,6)+DPP1/2.0
PT(JT,7)=PT(JT,7)+DPP2/2.0
PT(JT,8)=PT(JT,8)+DPP1/2.0
PT(JT,9)=PT(JT,9)+DPP2/2.0
PT(I,6)=PT(I,6)+DPT1/2.0
PT(I,7)=PT(I,7)+DPT2/2.0
PT(I,8)=PT(I,8)+DPT1/2.0
PT(I,9)=PT(I,9)+DPT2/2.0
DO 65 K=1,5
PT(JT,K)=PSC1(K)
PT(I,K)=PSC2(K)
65 CONTINUE
NFT(I,5)=MAX(1,NFT(I,5))
GO TO 80
70 CONTINUE
80 RETURN
END