[u/mrichter/AliRoot.git] / GEANT321 / gheisha / casp.F

*
* $Id$
*
* $Log$
* Revision 1.1.1.1  1995/10/24 10:21:00  cernlib
* Geant
*
*
#include "geant321/pilot.h"
*CMZ :  3.21/02 29/03/94  15.41.39  by  S.Giani
*-- Author :
      SUBROUTINE CASP(K,INT,NFL)
C
C *** CASCADE OF PROTON ***
C *** NVE 04-MAY-1988 CERN GENEVA ***
C
C ORIGIN : H.FESEFELDT (13-SEP-1987)
C
C P  UNDERGOES INTERACTION WITH NUCLEON WITHIN NUCLEUS.
C CHECK IF ENERGETICALLY POSSIBLE TO PRODUCE PIONS/KAONS.
C IF NOT ASSUME NUCLEAR EXCITATION OCCURS AND INPUT PARTICLE
C IS DEGRADED IN ENERGY.    NO OTHER PARTICLES PRODUCED.
C IF REACTION IS POSSIBLE FIND CORRECT NUMBER OF PIONS/PROTONS/
C NEUTRONS PRODUCED USING AN INTERPOLATION TO MULTIPLICITY DATA.
C REPLACE SOME PIONS OR PROTONS/NEUTRONS BY KAONS OR STRANGE BARYONS
C ACCORDING TO AVERAGE MULTIPLICITY PER INELASTIC REACTIONS.
C
#include "geant321/mxgkgh.inc"
#include "geant321/s_consts.inc"
#include "geant321/s_curpar.inc"
#include "geant321/s_result.inc"
#include "geant321/s_prntfl.inc"
#include "geant321/s_kginit.inc"
#include "geant321/limits.inc"
C
      REAL N
      DIMENSION PMUL(2,1200),ANORM(2,60),SUPP(10),CECH(10),B(2)
      DIMENSION RNDM(1)
      SAVE PMUL,ANORM
      DATA SUPP/0.,0.4,0.55,0.65,0.75,0.82,0.86,0.90,0.94,0.98/
      DATA CECH/0.50,0.45,0.40,0.35,0.30,0.25,0.06,0.04,0.005,0./
      DATA B/0.70,0.35/,C/1.25/
C
C --- INITIALIZATION INDICATED BY KGINIT(10) ---
      IF (KGINIT(10) .NE. 0) GO TO 10
      KGINIT(10)=1
C
C --- INITIALIZE PMUL AND ANORM ARRAYS ---
      DO 9000 J=1,1200
      DO 9001 I=1,2
      PMUL(I,J)=0.0
      IF (J .LE. 60) ANORM(I,J)=0.0
 9001 CONTINUE
 9000 CONTINUE
C
C** COMPUTE NORMALIZATION CONSTANTS
C** FOR P AS TARGET
C
      L=0
      DO 1 NP1=1,20
      NP=NP1-1
      NMM1=NP1-2
      IF(NMM1.LE.1) NMM1=1
      DO 1 NM1=NMM1,NP1
      NM=NM1-1
      DO 1 NZ1=1,20
      NZ=NZ1-1
      L=L+1
      IF(L.GT.1200) GOTO 1
      NPROT=2-NP+NM
      NNEUT=2-NPROT
      NT=NP+NM+NZ
      IF(NT.LE.0.OR.NT.GT.60) GOTO 1
      PMUL(1,L)=PMLTPC(NP,NM,NZ,NT,B(1),C)
      NPROTF=NFAC(NPROT)
      NNEUTF=NFAC(NNEUT)
      PMUL(1,L)=PMUL(1,L)/(NPROTF*NNEUTF)
      ANORM(1,NT)=ANORM(1,NT)+PMUL(1,L)
    1 CONTINUE
C** FOR N AS TARGET
      L=0
      DO 2 NP1=1,20
      NP=NP1-1
      NMM1=NP1-1
      IF(NMM1.LE.1) NMM1=1
      NPP1=NP1+1
      DO 2 NM1=NMM1,NPP1
      NM=NM1-1
      DO 2 NZ1=1,20
      NZ=NZ1-1
      L=L+1
      IF(L.GT.1200) GOTO 2
      NPROT=1-NP+NM
      NNEUT=2-NPROT
      NT=NP+NM+NZ
      IF(NT.LE.0.OR.NT.GT.60) GOTO 2
      PMUL(2,L)=PMLTPC(NP,NM,NZ,NT,B(2),C)
      NPROTF=NFAC(NPROT)
      NNEUTF=NFAC(NNEUT)
      PMUL(2,L)=PMUL(2,L)/(NPROTF*NNEUTF)
      ANORM(2,NT)=ANORM(2,NT)+PMUL(2,L)
    2 CONTINUE
      DO 3 I=1,60
      IF(ANORM(1,I).GT.0.) ANORM(1,I)=1./ANORM(1,I)
      IF(ANORM(2,I).GT.0.) ANORM(2,I)=1./ANORM(2,I)
    3 CONTINUE
      IF(.NOT.NPRT(10)) GOTO 10
      WRITE(NEWBCD,2001)
      DO 4 NFL=1,2
      WRITE(NEWBCD,2002) NFL
      WRITE(NEWBCD,2003) (ANORM(NFL,I),I=1,60)
      WRITE(NEWBCD,2003) (PMUL(NFL,I),I=1,1200)
    4 CONTINUE
C** CHOOSE PROTON OR NEUTRON AS TARGET
   10 NFL=2
      CALL GRNDM(RNDM,1)
      IF(RNDM(1).LT.ZNO2/ATNO2) NFL=1
      TARMAS=RMASS(14)
      IF (NFL .EQ. 2) TARMAS=RMASS(16)
      S=AMASQ+TARMAS**2+2.0*TARMAS*EN
      RS=SQRT(S)
      ENP(8)=AMASQ+TARMAS**2+2.0*TARMAS*ENP(6)
      ENP(9)=SQRT(ENP(8))
      EAB=RS-TARMAS-RMASS(14)
C**  ELASTIC SCATTERING
      NCECH=0
      NP=0
      NM=0
      NZ=0
      N=0.
      IF(INT.EQ.2) GOTO 20
C** INTRODUCE CHARGE EXCHANGE REACTION PN --> NP
      IF(NFL.EQ.1) GOTO 100
      IPLAB=IFIX(P*2.5)+1
      IF(IPLAB.GT.10) IPLAB=10
      CALL GRNDM(RNDM,1)
      IF(RNDM(1).GT.CECH(IPLAB)/ATNO2**0.42) GOTO 100
      NCECH=1
      GOTO 100
C**  CHECK IF ENERGETICALLY POSSIBLE TO PRODUCE ONE EXTRA PION IN REACT.
  20  IF (EAB .LE. RMASS(7)) GOTO 55
C**  SUPPRESSION OF HIGH MULTIPLICITY EVENTS AT LOW MOMENTUM
      IEAB=IFIX(EAB*5.)+1
      IF(IEAB.GT.10) GOTO 22
      CALL GRNDM(RNDM,1)
      IF(RNDM(1).LT.SUPP(IEAB)) GOTO 22
      N=1.
      GOTO (23,24),NFL
 23   CONTINUE
      TEST=-(1+B(1))**2/(2.0*C**2)
      IF (TEST .LT. EXPXL) TEST=EXPXL
      IF (TEST .GT. EXPXU) TEST=EXPXU
      W0=EXP(TEST)/2.0
      WP=EXP(TEST)
      CALL GRNDM(RNDM,1)
      RAN=RNDM(1)
      NP=0
      NM=0
      NZ=1
      IF(RAN.LT.W0/(W0+WP)) GOTO 100
      NP=1
      NM=0
      NZ=0
      GOTO 100
 24   CONTINUE
      TEST=-(1+B(2))**2/(2.0*C**2)
      IF (TEST .LT. EXPXL) TEST=EXPXL
      IF (TEST .GT. EXPXU) TEST=EXPXU
      W0=EXP(TEST)
      WP=EXP(TEST)/2.0
      TEST=-(-1+B(2))**2/(2.0*C**2)
      IF (TEST .LT. EXPXL) TEST=EXPXL
      IF (TEST .GT. EXPXU) TEST=EXPXU
      WM=EXP(TEST)/2.0
      WT=W0+WP+WM
      WP=W0+WP
      CALL GRNDM(RNDM,1)
      RAN=RNDM(1)
      NP=0
      NM=0
      NZ=1
      IF(RAN.LT.W0/WT) GOTO 100
      NP=1
      NM=0
      NZ=0
      IF(RAN.LT.WP/WT) GOTO 100
      NP=0
      NM=1
      NZ=0
      GOTO 100
C
   22 ALEAB=LOG(EAB)
C** NO. OF TOTAL PARTICLES VS SQRT(S)-2*MP
      N=3.62567+0.665843*ALEAB+0.336514*ALEAB*ALEAB
     * +0.117712*ALEAB*ALEAB*ALEAB+0.0136912*ALEAB*ALEAB*ALEAB*ALEAB
      N=N-2.
C** NORMALIZATION CONSTANT FOR  KNO-DISTRIBUTION
      ANPN=0.
      DO 21 NT=1,60
      TEST=-(PI/4.0)*(NT/N)**2
      IF (TEST .LT. EXPXL) TEST=EXPXL
      IF (TEST .GT. EXPXU) TEST=EXPXU
      DUM1=PI*NT/(2.0*N*N)
      DUM2=ABS(DUM1)
      DUM3=EXP(TEST)
      ADDNVE=0.0
      IF (DUM2 .GE. 1.0) ADDNVE=DUM1*DUM3
      IF ((DUM2 .LT. 1.0) .AND. (DUM3 .GE. 1.0E-10)) ADDNVE=DUM1*DUM3
      ANPN=ANPN+ADDNVE
   21 CONTINUE
      ANPN=1./ANPN
C** P OR N AS TARGET
      CALL GRNDM(RNDM,1)
      RAN=RNDM(1)
      EXCS=0.
      GOTO (30,40),NFL
C** FOR P AS TARGET
   30 L=0
      DO 31 NP1=1,20
      NP=NP1-1
      NMM1=NP1-2
      IF(NMM1.LE.1) NMM1=1
      DO 31 NM1=NMM1,NP1
      NM=NM1-1
      DO 31 NZ1=1,20
      NZ=NZ1-1
      L=L+1
      IF(L.GT.1200) GOTO 31
      NT=NP+NM+NZ
      IF(NT.LE.0.OR.NT.GT.60) GOTO 31
      TEST=-(PI/4.0)*(NT/N)**2
      IF (TEST .LT. EXPXL) TEST=EXPXL
      IF (TEST .GT. EXPXU) TEST=EXPXU
      DUM1=ANPN*PI*NT*PMUL(1,L)*ANORM(1,NT)/(2.0*N*N)
      DUM2=ABS(DUM1)
      DUM3=EXP(TEST)
      ADDNVE=0.0
      IF (DUM2 .GE. 1.0) ADDNVE=DUM1*DUM3
      IF ((DUM2 .LT. 1.0) .AND. (DUM3 .GE. 1.0E-10)) ADDNVE=DUM1*DUM3
      EXCS=EXCS+ADDNVE
      IF(RAN.LT.EXCS) GOTO 100
   31 CONTINUE
      GOTO 80
C** FOR N AS TARGET
   40 L=0
      DO 41 NP1=1,20
      NP=NP1-1
      NMM1=NP1-1
      IF(NMM1.LE.1) NMM1=1
      NPP1=NP1+1
      DO 41 NM1=NMM1,NPP1
      NM=NM1-1
      DO 41 NZ1=1,20
      NZ=NZ1-1
      L=L+1
      IF(L.GT.1200) GOTO 41
      NT=NP+NM+NZ
      IF(NT.LE.0.OR.NT.GT.60) GOTO 41
      TEST=-(PI/4.0)*(NT/N)**2
      IF (TEST .LT. EXPXL) TEST=EXPXL
      IF (TEST .GT. EXPXU) TEST=EXPXU
      DUM1=ANPN*PI*NT*PMUL(2,L)*ANORM(2,NT)/(2.0*N*N)
      DUM2=ABS(DUM1)
      DUM3=EXP(TEST)
      ADDNVE=0.0
      IF (DUM2 .GE. 1.0) ADDNVE=DUM1*DUM3
      IF ((DUM2 .LT. 1.0) .AND. (DUM3 .GE. 1.0E-10)) ADDNVE=DUM1*DUM3
      EXCS=EXCS+ADDNVE
      IF(RAN.LT.EXCS) GOTO 100
   41 CONTINUE
      GOTO 80
   50 IF(NPRT(4))
     *WRITE(NEWBCD,1003) EAB,N,NFL,NP,NM,NZ
      CALL STPAIR
      IF(INT.EQ.1) CALL TWOB(14,NFL,N)
      IF(INT.EQ.2) CALL GENXPT(14,NFL,N)
      GO TO 9999
   55 IF(NPRT(4))
     *WRITE(NEWBCD,1001)
      GOTO 53
C** EXCLUSIVE REACTION NOT FOUND,ASSUME ELASTIC SCATTERING
   80 IF(NPRT(4))
     *WRITE(NEWBCD,1004) RS,N
   53 INT=1
      NP=0
      NM=0
      NZ=0
  100 DO 101 I=1,60
  101 IPA(I)=0
      IF(INT.LE.0) GOTO 131
      NPROT=2-NP+NM+(1-NFL)
      NNEUT=2-NPROT
      GOTO (102,112),NFL
  102 GOTO (103,104),INT
  103 IPA(1)=14
      IPA(2)=14
      NT=2
      GOTO 130
  104 IF(NNEUT.EQ.1) GOTO 105
      IF(NNEUT.EQ.2) GOTO 106
      IPA(1)=14
      IPA(2)=14
      GOTO 120
  105 IPA(1)=14
      IPA(2)=16
      CALL GRNDM(RNDM,1)
      IF(RNDM(1).LT.0.5) GOTO 120
      IPA(1)=16
      IPA(2)=14
      GOTO 120
  106 IPA(1)=16
      IPA(2)=16
      GOTO 120
  112 GOTO (113,114),INT
  113 IPA(1)=14
      IPA(2)=16
      NT=2
      IF(NCECH.EQ.0) GOTO 130
      IPA(1)=16
      IPA(2)=14
      GOTO 130
  114 IF(NNEUT.EQ.1) GOTO 115
      IF(NNEUT.EQ.2) GOTO 116
      IPA(1)=14
      IPA(2)=14
      GOTO 120
  115 IPA(1)=16
      IPA(2)=14
      CALL GRNDM(RNDM,1)
      IF(RNDM(1).LT.0.33) GOTO 120
      IPA(1)=14
      IPA(2)=16
      GOTO 120
  116 IPA(1)=16
      IPA(2)=16
  120 NT=2
      IF(NP.EQ.0) GOTO 122
      DO 121 I=1,NP
      NT=NT+1
  121 IPA(NT)=7
  122 IF(NM.EQ.0) GOTO 124
      DO 123 I=1,NM
      NT=NT+1
  123 IPA(NT)=9
  124 IF(NZ.EQ.0) GOTO 130
      DO 125 I=1,NZ
      NT=NT+1
  125 IPA(NT)=8
  130 IF(NPRT(4))
     *WRITE(NEWBCD,2004) NT,(IPA(I),I=1,20)
      GOTO 50
  131 IF(NPRT(4))
     *WRITE(NEWBCD,2005)
C
1001  FORMAT('0*CASP* CASCADE ENERGETICALLY NOT POSSIBLE',
     $ ' CONTINUE WITH QUASI-ELASTIC SCATTERING')
1003  FORMAT(' *CASP* PROTON-INDUCED CASCADE,',
     $ ' AVAIL. ENERGY',2X,F8.4,
     $ 2X,'<NTOT>',2X,F8.4,2X,'FROM',4(2X,I3),2X,'PARTICLES')
1004  FORMAT(' *CASP* PROTON-INDUCED CASCADE,',
     $ ' EXCLUSIVE REACTION NOT FOUND',
     $ ' TRY ELASTIC SCATTERING  AVAIL. ENERGY',2X,F8.4,2X,
     $ ' <NTOT>',2X,F8.4)
2001  FORMAT('0*CASP* TABLES FOR MULT. DATA PROTON INDUCED REACTION',
     $ ' FOR DEFINITION OF NUMBERS SEE FORTRAN CODING')
2002  FORMAT(' *CASP* TARGET PARTICLE FLAG',2X,I5)
2003  FORMAT(1H ,10E12.4)
2004  FORMAT(' *CASP* ',I3,2X,'PARTICLES , MASS INDEX ARRAY',2X,20I4)
2005  FORMAT(' *CASP* NO PARTICLES PRODUCED')
C
 9999 CONTINUE
      END
Commit	Line	Data
fe4da5cc	1	*
	2	* $Id$
	3	*
	4	* $Log$
	5	* Revision 1.1.1.1 1995/10/24 10:21:00 cernlib
	6	* Geant
	7	*
	8	*
	9	#include "geant321/pilot.h"
	10	*CMZ : 3.21/02 29/03/94 15.41.39 by S.Giani
	11	*-- Author :
	12	SUBROUTINE CASP(K,INT,NFL)
	13	C
	14	C * CASCADE OF PROTON *
	15	C * NVE 04-MAY-1988 CERN GENEVA *
	16	C
	17	C ORIGIN : H.FESEFELDT (13-SEP-1987)
	18	C
	19	C P UNDERGOES INTERACTION WITH NUCLEON WITHIN NUCLEUS.
	20	C CHECK IF ENERGETICALLY POSSIBLE TO PRODUCE PIONS/KAONS.
	21	C IF NOT ASSUME NUCLEAR EXCITATION OCCURS AND INPUT PARTICLE
	22	C IS DEGRADED IN ENERGY. NO OTHER PARTICLES PRODUCED.
	23	C IF REACTION IS POSSIBLE FIND CORRECT NUMBER OF PIONS/PROTONS/
	24	C NEUTRONS PRODUCED USING AN INTERPOLATION TO MULTIPLICITY DATA.
	25	C REPLACE SOME PIONS OR PROTONS/NEUTRONS BY KAONS OR STRANGE BARYONS
	26	C ACCORDING TO AVERAGE MULTIPLICITY PER INELASTIC REACTIONS.
	27	C
	28	#include "geant321/mxgkgh.inc"
	29	#include "geant321/s_consts.inc"
	30	#include "geant321/s_curpar.inc"
	31	#include "geant321/s_result.inc"
	32	#include "geant321/s_prntfl.inc"
	33	#include "geant321/s_kginit.inc"
	34	#include "geant321/limits.inc"
	35	C
	36	REAL N
	37	DIMENSION PMUL(2,1200),ANORM(2,60),SUPP(10),CECH(10),B(2)
	38	DIMENSION RNDM(1)
	39	SAVE PMUL,ANORM
	40	DATA SUPP/0.,0.4,0.55,0.65,0.75,0.82,0.86,0.90,0.94,0.98/
	41	DATA CECH/0.50,0.45,0.40,0.35,0.30,0.25,0.06,0.04,0.005,0./
	42	DATA B/0.70,0.35/,C/1.25/
	43	C
	44	C --- INITIALIZATION INDICATED BY KGINIT(10) ---
	45	IF (KGINIT(10) .NE. 0) GO TO 10
	46	KGINIT(10)=1
	47	C
	48	C --- INITIALIZE PMUL AND ANORM ARRAYS ---
	49	DO 9000 J=1,1200
	50	DO 9001 I=1,2
	51	PMUL(I,J)=0.0
	52	IF (J .LE. 60) ANORM(I,J)=0.0
	53	9001 CONTINUE
	54	9000 CONTINUE
	55	C
	56	C** COMPUTE NORMALIZATION CONSTANTS
	57	C** FOR P AS TARGET
	58	C
	59	L=0
	60	DO 1 NP1=1,20
	61	NP=NP1-1
	62	NMM1=NP1-2
	63	IF(NMM1.LE.1) NMM1=1
	64	DO 1 NM1=NMM1,NP1
65	NM=NM1-1
66	DO 1 NZ1=1,20
67	NZ=NZ1-1
68	L=L+1
69	IF(L.GT.1200) GOTO 1
70	NPROT=2-NP+NM
71	NNEUT=2-NPROT
72	NT=NP+NM+NZ
73	IF(NT.LE.0.OR.NT.GT.60) GOTO 1
74	PMUL(1,L)=PMLTPC(NP,NM,NZ,NT,B(1),C)
75	NPROTF=NFAC(NPROT)
76	NNEUTF=NFAC(NNEUT)
77	PMUL(1,L)=PMUL(1,L)/(NPROTF*NNEUTF)
78	ANORM(1,NT)=ANORM(1,NT)+PMUL(1,L)
79	1 CONTINUE
80	C** FOR N AS TARGET
81	L=0
82	DO 2 NP1=1,20
83	NP=NP1-1
84	NMM1=NP1-1
85	IF(NMM1.LE.1) NMM1=1
86	NPP1=NP1+1
87	DO 2 NM1=NMM1,NPP1
88	NM=NM1-1
89	DO 2 NZ1=1,20
90	NZ=NZ1-1
91	L=L+1
92	IF(L.GT.1200) GOTO 2
93	NPROT=1-NP+NM
94	NNEUT=2-NPROT
95	NT=NP+NM+NZ
96	IF(NT.LE.0.OR.NT.GT.60) GOTO 2
97	PMUL(2,L)=PMLTPC(NP,NM,NZ,NT,B(2),C)
98	NPROTF=NFAC(NPROT)
99	NNEUTF=NFAC(NNEUT)
100	PMUL(2,L)=PMUL(2,L)/(NPROTF*NNEUTF)
101	ANORM(2,NT)=ANORM(2,NT)+PMUL(2,L)
102	2 CONTINUE
103	DO 3 I=1,60
104	IF(ANORM(1,I).GT.0.) ANORM(1,I)=1./ANORM(1,I)
105	IF(ANORM(2,I).GT.0.) ANORM(2,I)=1./ANORM(2,I)
106	3 CONTINUE
107	IF(.NOT.NPRT(10)) GOTO 10
108	WRITE(NEWBCD,2001)
109	DO 4 NFL=1,2
110	WRITE(NEWBCD,2002) NFL
111	WRITE(NEWBCD,2003) (ANORM(NFL,I),I=1,60)
112	WRITE(NEWBCD,2003) (PMUL(NFL,I),I=1,1200)
113	4 CONTINUE
114	C** CHOOSE PROTON OR NEUTRON AS TARGET
115	10 NFL=2
116	CALL GRNDM(RNDM,1)
117	IF(RNDM(1).LT.ZNO2/ATNO2) NFL=1
118	TARMAS=RMASS(14)
119	IF (NFL .EQ. 2) TARMAS=RMASS(16)
120	S=AMASQ+TARMAS*2+2.0TARMAS*EN
121	RS=SQRT(S)
122	ENP(8)=AMASQ+TARMAS*2+2.0TARMAS*ENP(6)
123	ENP(9)=SQRT(ENP(8))
124	EAB=RS-TARMAS-RMASS(14)
125	C** ELASTIC SCATTERING
126	NCECH=0
127	NP=0
128	NM=0
129	NZ=0
130	N=0.
131	IF(INT.EQ.2) GOTO 20
132	C** INTRODUCE CHARGE EXCHANGE REACTION PN --> NP
133	IF(NFL.EQ.1) GOTO 100
134	IPLAB=IFIX(P*2.5)+1
135	IF(IPLAB.GT.10) IPLAB=10
136	CALL GRNDM(RNDM,1)
137	IF(RNDM(1).GT.CECH(IPLAB)/ATNO2**0.42) GOTO 100
138	NCECH=1
139	GOTO 100
140	C** CHECK IF ENERGETICALLY POSSIBLE TO PRODUCE ONE EXTRA PION IN REACT.
141	20 IF (EAB .LE. RMASS(7)) GOTO 55
142	C** SUPPRESSION OF HIGH MULTIPLICITY EVENTS AT LOW MOMENTUM
143	IEAB=IFIX(EAB*5.)+1
144	IF(IEAB.GT.10) GOTO 22
145	CALL GRNDM(RNDM,1)
146	IF(RNDM(1).LT.SUPP(IEAB)) GOTO 22
147	N=1.
148	GOTO (23,24),NFL
149	23 CONTINUE
150	TEST=-(1+B(1))*2/(2.0C**2)
151	IF (TEST .LT. EXPXL) TEST=EXPXL
152	IF (TEST .GT. EXPXU) TEST=EXPXU
153	W0=EXP(TEST)/2.0
154	WP=EXP(TEST)
155	CALL GRNDM(RNDM,1)
156	RAN=RNDM(1)
157	NP=0
158	NM=0
159	NZ=1
160	IF(RAN.LT.W0/(W0+WP)) GOTO 100
161	NP=1
162	NM=0
163	NZ=0
164	GOTO 100
165	24 CONTINUE
166	TEST=-(1+B(2))*2/(2.0C**2)
167	IF (TEST .LT. EXPXL) TEST=EXPXL
168	IF (TEST .GT. EXPXU) TEST=EXPXU
169	W0=EXP(TEST)
170	WP=EXP(TEST)/2.0
171	TEST=-(-1+B(2))*2/(2.0C**2)
172	IF (TEST .LT. EXPXL) TEST=EXPXL
173	IF (TEST .GT. EXPXU) TEST=EXPXU
174	WM=EXP(TEST)/2.0
175	WT=W0+WP+WM
176	WP=W0+WP
177	CALL GRNDM(RNDM,1)
178	RAN=RNDM(1)
179	NP=0
180	NM=0
181	NZ=1
182	IF(RAN.LT.W0/WT) GOTO 100
183	NP=1
184	NM=0
185	NZ=0
186	IF(RAN.LT.WP/WT) GOTO 100
187	NP=0
188	NM=1
189	NZ=0
190	GOTO 100
191	C
192	22 ALEAB=LOG(EAB)
193	C** NO. OF TOTAL PARTICLES VS SQRT(S)-2*MP
194	N=3.62567+0.665843ALEAB+0.336514ALEAB*ALEAB
195	* +0.117712ALEABALEABALEAB+0.0136912ALEABALEABALEAB*ALEAB
196	N=N-2.
197	C** NORMALIZATION CONSTANT FOR KNO-DISTRIBUTION
198	ANPN=0.
199	DO 21 NT=1,60
200	TEST=-(PI/4.0)(NT/N)*2
201	IF (TEST .LT. EXPXL) TEST=EXPXL
202	IF (TEST .GT. EXPXU) TEST=EXPXU
203	DUM1=PINT/(2.0N*N)
204	DUM2=ABS(DUM1)
205	DUM3=EXP(TEST)
206	ADDNVE=0.0
207	IF (DUM2 .GE. 1.0) ADDNVE=DUM1*DUM3
208	IF ((DUM2 .LT. 1.0) .AND. (DUM3 .GE. 1.0E-10)) ADDNVE=DUM1*DUM3
209	ANPN=ANPN+ADDNVE
210	21 CONTINUE
211	ANPN=1./ANPN
212	C** P OR N AS TARGET
213	CALL GRNDM(RNDM,1)
214	RAN=RNDM(1)
215	EXCS=0.
216	GOTO (30,40),NFL
217	C** FOR P AS TARGET
218	30 L=0
219	DO 31 NP1=1,20
220	NP=NP1-1
221	NMM1=NP1-2
222	IF(NMM1.LE.1) NMM1=1
223	DO 31 NM1=NMM1,NP1
224	NM=NM1-1
225	DO 31 NZ1=1,20
226	NZ=NZ1-1
227	L=L+1
228	IF(L.GT.1200) GOTO 31
229	NT=NP+NM+NZ
230	IF(NT.LE.0.OR.NT.GT.60) GOTO 31
231	TEST=-(PI/4.0)(NT/N)*2
232	IF (TEST .LT. EXPXL) TEST=EXPXL
233	IF (TEST .GT. EXPXU) TEST=EXPXU
234	DUM1=ANPNPINTPMUL(1,L)ANORM(1,NT)/(2.0NN)
235	DUM2=ABS(DUM1)
236	DUM3=EXP(TEST)
237	ADDNVE=0.0
238	IF (DUM2 .GE. 1.0) ADDNVE=DUM1*DUM3
239	IF ((DUM2 .LT. 1.0) .AND. (DUM3 .GE. 1.0E-10)) ADDNVE=DUM1*DUM3
240	EXCS=EXCS+ADDNVE
241	IF(RAN.LT.EXCS) GOTO 100
242	31 CONTINUE
243	GOTO 80
244	C** FOR N AS TARGET
245	40 L=0
246	DO 41 NP1=1,20
247	NP=NP1-1
248	NMM1=NP1-1
249	IF(NMM1.LE.1) NMM1=1
250	NPP1=NP1+1
251	DO 41 NM1=NMM1,NPP1
252	NM=NM1-1
253	DO 41 NZ1=1,20
254	NZ=NZ1-1
255	L=L+1
256	IF(L.GT.1200) GOTO 41
257	NT=NP+NM+NZ
258	IF(NT.LE.0.OR.NT.GT.60) GOTO 41
259	TEST=-(PI/4.0)(NT/N)*2
260	IF (TEST .LT. EXPXL) TEST=EXPXL
261	IF (TEST .GT. EXPXU) TEST=EXPXU
262	DUM1=ANPNPINTPMUL(2,L)ANORM(2,NT)/(2.0NN)
263	DUM2=ABS(DUM1)
264	DUM3=EXP(TEST)
265	ADDNVE=0.0
266	IF (DUM2 .GE. 1.0) ADDNVE=DUM1*DUM3
267	IF ((DUM2 .LT. 1.0) .AND. (DUM3 .GE. 1.0E-10)) ADDNVE=DUM1*DUM3
268	EXCS=EXCS+ADDNVE
269	IF(RAN.LT.EXCS) GOTO 100
270	41 CONTINUE
271	GOTO 80
272	50 IF(NPRT(4))
273	*WRITE(NEWBCD,1003) EAB,N,NFL,NP,NM,NZ
274	CALL STPAIR
275	IF(INT.EQ.1) CALL TWOB(14,NFL,N)
276	IF(INT.EQ.2) CALL GENXPT(14,NFL,N)
277	GO TO 9999
278	55 IF(NPRT(4))
279	*WRITE(NEWBCD,1001)
280	GOTO 53
281	C** EXCLUSIVE REACTION NOT FOUND,ASSUME ELASTIC SCATTERING
282	80 IF(NPRT(4))
283	*WRITE(NEWBCD,1004) RS,N
284	53 INT=1
285	NP=0
286	NM=0
287	NZ=0
288	100 DO 101 I=1,60
289	101 IPA(I)=0
290	IF(INT.LE.0) GOTO 131
291	NPROT=2-NP+NM+(1-NFL)
292	NNEUT=2-NPROT
293	GOTO (102,112),NFL
294	102 GOTO (103,104),INT
295	103 IPA(1)=14
296	IPA(2)=14
297	NT=2
298	GOTO 130
299	104 IF(NNEUT.EQ.1) GOTO 105
300	IF(NNEUT.EQ.2) GOTO 106
301	IPA(1)=14
302	IPA(2)=14
303	GOTO 120
304	105 IPA(1)=14
305	IPA(2)=16
306	CALL GRNDM(RNDM,1)
307	IF(RNDM(1).LT.0.5) GOTO 120
308	IPA(1)=16
309	IPA(2)=14
310	GOTO 120
311	106 IPA(1)=16
312	IPA(2)=16
313	GOTO 120
314	112 GOTO (113,114),INT
315	113 IPA(1)=14
316	IPA(2)=16
317	NT=2
318	IF(NCECH.EQ.0) GOTO 130
319	IPA(1)=16
320	IPA(2)=14
321	GOTO 130
322	114 IF(NNEUT.EQ.1) GOTO 115
323	IF(NNEUT.EQ.2) GOTO 116
324	IPA(1)=14
325	IPA(2)=14
326	GOTO 120
327	115 IPA(1)=16
328	IPA(2)=14
329	CALL GRNDM(RNDM,1)
330	IF(RNDM(1).LT.0.33) GOTO 120
331	IPA(1)=14
332	IPA(2)=16
333	GOTO 120
334	116 IPA(1)=16
335	IPA(2)=16
336	120 NT=2
337	IF(NP.EQ.0) GOTO 122
338	DO 121 I=1,NP
339	NT=NT+1
340	121 IPA(NT)=7
341	122 IF(NM.EQ.0) GOTO 124
342	DO 123 I=1,NM
343	NT=NT+1
344	123 IPA(NT)=9
345	124 IF(NZ.EQ.0) GOTO 130
346	DO 125 I=1,NZ
347	NT=NT+1
348	125 IPA(NT)=8
349	130 IF(NPRT(4))
350	*WRITE(NEWBCD,2004) NT,(IPA(I),I=1,20)
351	GOTO 50
352	131 IF(NPRT(4))
353	*WRITE(NEWBCD,2005)
354	C
355	1001 FORMAT('0CASP CASCADE ENERGETICALLY NOT POSSIBLE',
356	$ ' CONTINUE WITH QUASI-ELASTIC SCATTERING')
357	1003 FORMAT(' CASP PROTON-INDUCED CASCADE,',
358	$ ' AVAIL. ENERGY',2X,F8.4,
359	$ 2X,'<NTOT>',2X,F8.4,2X,'FROM',4(2X,I3),2X,'PARTICLES')
360	1004 FORMAT(' CASP PROTON-INDUCED CASCADE,',
361	$ ' EXCLUSIVE REACTION NOT FOUND',
362	$ ' TRY ELASTIC SCATTERING AVAIL. ENERGY',2X,F8.4,2X,
363	$ ' <NTOT>',2X,F8.4)
364	2001 FORMAT('0CASP TABLES FOR MULT. DATA PROTON INDUCED REACTION',
365	$ ' FOR DEFINITION OF NUMBERS SEE FORTRAN CODING')
366	2002 FORMAT(' CASP TARGET PARTICLE FLAG',2X,I5)
367	2003 FORMAT(1H ,10E12.4)
368	2004 FORMAT(' CASP ',I3,2X,'PARTICLES , MASS INDEX ARRAY',2X,20I4)
369	2005 FORMAT(' CASP NO PARTICLES PRODUCED')
370	C
371	9999 CONTINUE
372	END