5 * Revision 1.1.1.1 1995/10/24 10:21:01 cernlib
9 #include "geant321/pilot.h"
10 *CMZ : 3.21/02 29/03/94 15.41.39 by S.Giani
12 SUBROUTINE CASPB(K,INT,NFL)
14 C *** CASCADE OF ANTI PROTON ***
15 C *** NVE 04-MAY-1988 CERN GENEVA ***
17 C ORIGIN : H.FESEFELDT (13-SEP-1987)
19 C PB 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.
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"
37 DIMENSION PMUL1(2,1200),PMUL2(2,400),ANORM1(2,60),ANORM2(2,60),
38 $ SUPP(10),CECH(20),ANHL(29),B(2)
40 SAVE PMUL1,ANORM1,PMUL2,ANORM2
41 DATA SUPP/0.,0.4,0.55,0.65,0.75,0.82,0.86,0.90,0.94,0.98/
42 DATA CECH/0.14,0.17,0.18,0.18,0.18,0.17,0.17,0.16,0.155,0.145,
43 * 0.11,0.082,0.065,0.050,0.041,0.035,0.028,0.024,0.010
45 DATA ANHL/1.00,1.00,1.00,1.00,1.0,1.00,1.0,1.00,1.00,0.90
46 * ,0.6,0.52,0.47,0.44,0.41,0.39,0.37,0.35,0.34,0.24
47 * ,0.19,0.15,0.12,0.10,0.09,0.07,0.06,0.05,0./
48 DATA B/0.7,0.7/,C/1.25/
50 C --- INITIALIZATION INDICATED BY KGINIT(11) ---
51 IF (KGINIT(11) .NE. 0) GO TO 10
54 C --- INITIALIZE PMUL AND ANORM ARRAYS ---
58 IF (J .LE. 400) PMUL2(I,J)=0.0
59 IF (J .LE. 60) ANORM1(I,J)=0.0
60 IF (J .LE. 60) ANORM2(I,J)=0.0
64 C** COMPUTE NORMALIZATION CONSTANTS
80 IF(NT.LE.0.OR.NT.GT.60) GOTO 1
81 PMUL1(1,L)=PMLTPC(NP,NM,NZ,NT,B(1),C)
82 ANORM1(1,NT)=ANORM1(1,NT)+PMUL1(1,L)
96 IF(NT.LE.0.OR.NT.GT.60) GOTO 2
97 PMUL1(2,L)=PMLTPC(NP,NM,NZ,NT,B(2),C)
98 ANORM1(2,NT)=ANORM1(2,NT)+PMUL1(2,L)
101 IF(ANORM1(1,I).GT.0.) ANORM1(1,I)=1./ANORM1(1,I)
102 IF(ANORM1(2,I).GT.0.) ANORM1(2,I)=1./ANORM1(2,I)
104 IF(.NOT.NPRT(10)) GOTO 9
107 WRITE(NEWBCD,2002) NFL
108 WRITE(NEWBCD,2003) (ANORM1(NFL,I),I=1,60)
109 WRITE(NEWBCD,2003) (PMUL1(NFL,I),I=1,1200)
111 C** DO THE SAME FOR ANNIHILATION CHANNELS
123 IF(NT.LE.1.OR.NT.GT.60) GOTO 5
124 PMUL2(1,L)=PMLTPC(NP,NM,NZ,NT,B(1),C)
125 ANORM2(1,NT)=ANORM2(1,NT)+PMUL2(1,L)
137 IF(NT.LE.1.OR.NT.GT.60) GOTO 6
138 PMUL2(2,L)=PMLTPC(NP,NM,NZ,NT,B(2),C)
139 ANORM2(2,NT)=ANORM2(2,NT)+PMUL2(2,L)
142 IF(ANORM2(1,I).GT.0.) ANORM2(1,I)=1./ANORM2(1,I)
143 IF(ANORM2(2,I).GT.0.) ANORM2(2,I)=1./ANORM2(2,I)
145 IF(.NOT.NPRT(10)) GOTO 10
148 WRITE(NEWBCD,3002) NFL
149 WRITE(NEWBCD,3003) (ANORM2(NFL,I),I=1,60)
150 WRITE(NEWBCD,3003) (PMUL2(NFL,I),I=1,400)
152 C** CHOOSE PROTON OR NEUTRON AS TARGET
155 IF(RNDM(1).LT.ZNO2/ATNO2) NFL=1
157 IF (NFL .EQ. 2) TARMAS=RMASS(16)
158 S=AMASQ+TARMAS**2+2.0*TARMAS*EN
160 ENP(8)=AMASQ+TARMAS**2+2.0*TARMAS*ENP(6)
162 EAB=RS-TARMAS-ABS(RMASS(15))
163 C** ELASTIC SCATTERING
170 C** INTRODUCE CHARGE EXCHANGE REACTION PB P --> NB N
171 IF(NFL.EQ.2) GOTO 100
173 IF(IPLAB.GT.10) IPLAB=IFIX(P)+10
174 IF(IPLAB.GT.20) IPLAB=20
176 IF(RNDM(1).GT.CECH(IPLAB)/ATNO2**0.75) GOTO 100
179 C** ANNIHILATION CHANNELS
180 20 IPLAB=IFIX(P*10.)+1
181 IF(IPLAB.GT.10) IPLAB=IFIX(P)+10
182 IF(IPLAB.GT.19) IPLAB=IFIX(P/10.)+19
183 IF(IPLAB.GT.28) IPLAB=29
185 IF(RNDM(1).GT.ANHL(IPLAB)) GOTO 19
187 IF (EAB .LE. 2.0*RMASS(7)) GOTO 55
189 C** CHECK IF ENERGETICALLY POSSIBLE TO PRODUCE ONE EXTRA PION IN REACT.
190 19 IF (EAB .LE. RMASS(7)) GOTO 55
191 C** SUPPRESSION OF HIGH MULTIPLICITY EVENTS AT LOW MOMENTUM
193 IF(IEAB.GT.10) GOTO 22
195 IF(RNDM(1).LT.SUPP(IEAB)) GOTO 22
199 TEST=-(1+B(1))**2/(2.0*C**2)
200 IF (TEST .LT. EXPXL) TEST=EXPXL
201 IF (TEST .GT. EXPXU) TEST=EXPXU
203 TEST=-(-1+B(1))**2/(2.0*C**2)
204 IF (TEST .LT. EXPXL) TEST=EXPXL
205 IF (TEST .GT. EXPXU) TEST=EXPXU
212 IF(RAN.LT.W0/(W0+WM)) GOTO 100
218 TEST=-(1+B(2))**2/(2.0*C**2)
219 IF (TEST .LT. EXPXL) TEST=EXPXL
220 IF (TEST .GT. EXPXU) TEST=EXPXU
223 TEST=-(-1+B(2))**2/(2.0*C**2)
224 IF (TEST .LT. EXPXL) TEST=EXPXL
225 IF (TEST .GT. EXPXU) TEST=EXPXU
234 IF(RAN.LT.W0/WT) GOTO 100
238 IF(RAN.LT.WP/WT) GOTO 100
245 C** NO. OF TOTAL PARTICLES VS SQRT(S)-2*MP
246 N=3.62567+0.665843*ALEAB+0.336514*ALEAB*ALEAB
247 * +0.117712*ALEAB*ALEAB*ALEAB+0.0136912*ALEAB*ALEAB*ALEAB*ALEAB
249 C** NORMALIZATION CONSTANT FOR KNO-DISTRIBUTION
252 TEST=-(PI/4.0)*(NT/N)**2
253 IF (TEST .LT. EXPXL) TEST=EXPXL
254 IF (TEST .GT. EXPXU) TEST=EXPXU
259 IF (DUM2 .GE. 1.0) ADDNVE=DUM1*DUM3
260 IF ((DUM2 .LT. 1.0) .AND. (DUM3 .GT. 1.0E-10)) ADDNVE=DUM1*DUM3
281 IF(L.GT.1200) GOTO 31
283 IF(NT.LE.0.OR.NT.GT.60) GOTO 31
284 TEST=-(PI/4.0)*(NT/N)**2
285 IF (TEST .LT. EXPXL) TEST=EXPXL
286 IF (TEST .GT. EXPXU) TEST=EXPXU
287 DUM1=ANPN*PI*NT*PMUL1(1,L)*ANORM1(1,NT)/(2.0*N*N)
291 IF (DUM2 .GE. 1.0) ADDNVE=DUM1*DUM3
292 IF ((DUM2 .LT. 1.0) .AND. (DUM3 .GT. 1.0E-10)) ADDNVE=DUM1*DUM3
294 IF(RAN.LT.EXCS) GOTO 100
307 IF(L.GT.1200) GOTO 41
309 IF(NT.LE.0.OR.NT.GT.60) GOTO 41
310 TEST=-(PI/4.0)*(NT/N)**2
311 IF (TEST .LT. EXPXL) TEST=EXPXL
312 IF (TEST .GT. EXPXU) TEST=EXPXU
313 DUM1=ANPN*PI*NT*PMUL1(2,L)*ANORM1(2,NT)/(2.0*N*N)
317 IF (DUM2 .GE. 1.0) ADDNVE=DUM1*DUM3
318 IF ((DUM2 .LT. 1.0) .AND. (DUM3 .GT. 1.0E-10)) ADDNVE=DUM1*DUM3
320 IF(RAN.LT.EXCS) GOTO 100
323 C** ANNIHILATION CHANNELS
327 C** NO. OF TOTAL PARTICLES VS SQRT(S)
328 N=3.62567+0.665843*ALEAB+0.336514*ALEAB*ALEAB
329 * +0.117712*ALEAB*ALEAB*ALEAB+0.0136912*ALEAB*ALEAB*ALEAB*ALEAB
331 C** NORMALIZATION CONSTANT FOR KNO-DISTRIBUTION
334 TEST=-(PI/4.0)*(NT/N)**2
335 IF (TEST .LT. EXPXL) TEST=EXPXL
336 IF (TEST .GT. EXPXU) TEST=EXPXU
341 IF (DUM2 .GE. 1.0) ADDNVE=DUM1*DUM3
342 IF ((DUM2 .LT. 1.0) .AND. (DUM3 .GT. 1.0E-10)) ADDNVE=DUM1*DUM3
359 IF(L.GT.400) GOTO 231
361 IF(NT.LE.1.OR.NT.GT.60) GOTO 231
362 TEST=-(PI/4.0)*(NT/N)**2
363 IF (TEST .LT. EXPXL) TEST=EXPXL
364 IF (TEST .GT. EXPXU) TEST=EXPXU
365 DUM1=ANPN*PI*NT*PMUL2(1,L)*ANORM2(1,NT)/(2.0*N*N)
369 IF (DUM2 .GE. 1.0) ADDNVE=DUM1*DUM3
370 IF ((DUM2 .LT. 1.0) .AND. (DUM3 .GT. 1.0E-10)) ADDNVE=DUM1*DUM3
372 IF(RAN.LT.EXCS) GOTO 120
383 IF(L.GT.400) GOTO 241
385 IF(NT.LE.1.OR.NT.GT.60) GOTO 241
386 TEST=-(PI/4.0)*(NT/N)**2
387 IF (TEST .LT. EXPXL) TEST=EXPXL
388 IF (TEST .GT. EXPXU) TEST=EXPXU
389 DUM1=ANPN*PI*NT*PMUL2(2,L)*ANORM2(2,NT)/(2.0*N*N)
393 IF (DUM2 .GE. 1.0) ADDNVE=DUM1*DUM3
394 IF ((DUM2 .LT. 1.0) .AND. (DUM3 .GT. 1.0E-10)) ADDNVE=DUM1*DUM3
396 IF(RAN.LT.EXCS) GOTO 120
400 *WRITE(NEWBCD,1003) EAB,N,NFL,NP,NM,NZ
402 IF(INT.EQ.1) CALL TWOB(15,NFL,N)
403 IF(INT.EQ.2) CALL GENXPT(15,NFL,N)
408 C** EXCLUSIVE REACTION NOT FOUND,ASSUME ELASTIC SCATTERING
410 *WRITE(NEWBCD,1004)EAB,N
417 IF(INT.LE.0) GOTO 131
419 102 GOTO (103,104),INT
424 104 IF(NP.EQ.-1+NM) GOTO 105
425 IF(NP.EQ. NM) GOTO 106
432 IF(RNDM(1).LT.0.5) GOTO 120
439 112 GOTO (113,114),INT
443 IF(NCECH.EQ.0) GOTO 130
447 114 IF(NP.EQ. NM) GOTO 115
448 IF(NP.EQ.1+NM) GOTO 116
455 IF(RNDM(1).LT.0.33) GOTO 120
466 122 IF(NM.EQ.0) GOTO 124
470 124 IF(NZ.EQ.0) GOTO 130
475 *WRITE(NEWBCD,2004) NT,(IPA(I),I=1,20)
480 1001 FORMAT('0*CASPB* CASCADE ENERGETICALLY NOT POSSIBLE',
481 $ ' CONTINUE WITH QUASI-ELASTIC SCATTERING')
482 1003 FORMAT(' *CASPB* ANTIPROTON-INDUCED CASCADE,',
483 $ ' AVAIL. ENERGY',2X,F8.4,
484 $ 2X,'<NTOT>',2X,F8.4,2X,'FROM',4(2X,I3),2X,'PARTICLES')
485 1004 FORMAT(' *CASPB* ANTIPROTON-INDUCED CASCADE,',
486 $ ' EXCLUSIVE REACTION',
487 $ ' NOT FOUND TRY ELASTIC SCATTERING AVAIL. ENERGY',2X,F8.4,2X,
489 2001 FORMAT('0*CASPB* TABLES FOR MULT. DATA ANTIPROTON INDUCED ',
490 $ 'REACTION FOR DEFINITION OF NUMBERS SEE FORTRAN CODING')
491 2002 FORMAT(' *CASPB* TARGET PARTICLE FLAG',2X,I5)
492 2003 FORMAT(1H ,10E12.4)
493 2004 FORMAT(' *CASPB* ',I3,2X,'PARTICLES , MASS INDEX ARRAY',2X,20I4)
494 2005 FORMAT(' *CASPB* NO PARTICLES PRODUCED')
495 3001 FORMAT('0*CASPB* TABLES FOR MULT. DATA ANTIPROTON INDUCED ',
496 $ ' ANNIHILATION REACTION FOR DEFINITION OF NUMBERS SEE FORTRAN',
498 3002 FORMAT(' *CASPB* TARGET PARTICLE FLAG',2X,I5)
499 3003 FORMAT(1H ,10E12.4)