5 * Revision 1.1.1.1 1999/05/18 15:55:20 fca
8 * Revision 1.1.1.1 1995/10/24 10:21:37 cernlib
12 #include "geant321/pilot.h"
13 #if defined(CERNLIB_ASHO)
14 *CMZ : 3.21/02 29/03/94 15.41.24 by S.Giani
16 SUBROUTINE GASHO(P,XXMASS,GSTEP,DE)
17 #include "geant321/gcbank.inc"
18 #include "geant321/gcjloc.inc"
19 #include "geant321/gccuts.inc"
20 #include "geant321/gcmate.inc"
21 #include "geant321/gcasho.inc"
22 C-----------------------------------------------------------------------
23 C ASHO model for energy loss straggling
24 C The main subprograms are:
25 C - MIXMGO - prepares the parameters of a mixture
26 C or compound used (called from GIASHO);
27 C - GOSCMG - prepares the parameters of the oscillators;
28 C - GDIFMG - calculates the differential spectrum of the
30 C The main initial data bank is in COMMON block GCASHO contai-
31 C ning the parameters of a number of elements.
32 C-----------------------------------------------------------------------
33 C Update history: 16-8-93
35 C-----------------------------------------------------------------------
36 C The main initial common block and its components.
37 C NELM - number of basic elements;
38 C ZELM - atomic numbers of the elements;
39 C AELM - atomic weights of the elements;
40 C DELM - densities of the elements (g/cm3);
41 C E0ELM - ionization potentials of the elements (keV);
42 C NSELM - numbers of the electron shells in the atoms;
43 C ZSELM - numbers of electrons in each of the shells;
44 C ESELM - binding energies of the shell electrons (keV).
45 C This information may be included in JMATE by GSMATE or GMATE.
46 C *) The density values for gases are given at
47 C 0 C 1 atm. Those for solids are not precise and
48 C should be substituted for particular
50 C **) The current number of the elements used is equal to 16.
51 C ***) To change the energy scale from keV to GeV, as it is
52 C used in GEANT, it is needed to add 1.E-6 to E0ELM, ESELM,
53 C PLASM, TRNSMA, 6. (in RESMGO), SL (in REAMGO), SL (in
54 C SLDMGO) and extract 1.E-6 in DE (in DELMGO).
55 C-----------------------------------------------------------------------
56 C GCASHO contains also the kinematical parame-
57 C ters as well as some thermodynamical ones:
58 C PLIN (P/mc), PLOG (log10(PLIN)), BE2 (velocity/c squared),
59 C the path length STEP of the particle,
60 C and the medium plasma energy
61 C PLASM. TRNSMA is the maximum transferable energy (now
62 C it is set to correspond to TCUT in GEANT !).
63 C In GEANT the initial parameters are P, E, XMASS, STEP
65 C-----------------------------------------------------------------------
66 C In addition, it contains the parameters of the oscillators:
67 C - BOSC is the array of "ksi/I",
68 C - AOSC is the array of "lnA",
69 C - NOSC is the number of the oscillators,
70 C - EOSC is the array of the oscillator energies,
71 C - IOSC is the upper array in integers,
72 C - ZOSC is the array of the oscillator weights,
73 C - EMEAN is the mean energy loss.
74 C-----------------------------------------------------------------------
75 C Finally, GCASHO contains the parameters of the energy loss
77 C - CMGO is the differential or integral distribution coeff.,
78 C - NMGO is the number of bins,
79 C - NMGOMA is the maximum of possible NMGO,
80 C - EMGO is the energy corresponding to one bin,
81 C - EMGOMI is the energy corresponding to 0th bin.
82 C-----------------------------------------------------------------------
83 PARAMETER (DNMGOM=2000)
84 C-----------------------------------------------------------------------
92 ZSMED(KMED) = Q(JASHO+5+KMED)
93 ESMED(KMED) = Q(JASHO+5+NSMED+KMED)
95 PLASM = 0.028817*SQRT((ZMED/AMED)*DENS)
98 C-----------------------------------------------------------------------
99 C In GEANT the initial kinematic parameters : P, E, XMASS.
100 C The following gets the kinematic parameters of the particle:
101 C PLIN (P/mc), PLOG (lg(PLIN)), BE2 (velocity/c squared) and
102 C its path length STEP.
103 C-----------------------------------------------------------------------
106 BE2 = PLIN**2/(1.+PLIN**2)
107 C-----------------------------------------------------------------------
108 C Now we set TRNSMA to correspond to TCUT in GEANT.
109 C-----------------------------------------------------------------------
111 C-----------------------------------------------------------------------
112 C Here is the calculation of the parameters of the oscillators
113 C-----------------------------------------------------------------------
115 C-----------------------------------------------------------------------
116 C Here is the calculation of the diffrential distribution
117 C-----------------------------------------------------------------------
120 C-----------------------------------------------------------------------
123 SUBROUTINE GASHO_DUMMY