Ignore:
Timestamp:
Dec 22, 2010, 3:52:27 PM (14 years ago)
Author:
garnier
Message:

geant4 tag 9.4

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1 edited

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  • trunk/source/processes/hadronic/models/de_excitation/evaporation/src/G4TritonEvaporationProbability.cc

    r1315 r1347  
    2424// ********************************************************************
    2525//
    26 //J.M. Quesada (August2008). Based on:
     26// $Id: G4TritonEvaporationProbability.cc,v 1.18 2010/11/17 11:06:03 vnivanch Exp $
     27// GEANT4 tag $Name: geant4-09-04-ref-00 $
     28//
     29// J.M. Quesada (August2008). Based on:
    2730//
    2831// Hadronic Process: Nuclear De-excitations
    2932// by V. Lara (Oct 1998)
    3033//
    31 // Modif (03 September 2008) by J. M. Quesada for external choice of inverse
    32 // cross section option
     34// Modified:
     35// 03-09-2008 J.M. Quesada for external choice of inverse cross section option
     36// 17-11-2010 V.Ivanchenko integer Z and A
    3337
    3438#include "G4TritonEvaporationProbability.hh"
    … …  
    3640G4TritonEvaporationProbability::G4TritonEvaporationProbability() :
    3741    G4EvaporationProbability(3,1,2,&theCoulombBarrier) // A,Z,Gamma,&theCoulombBarrier
    38 {
    39 
    40 }
    41 
    42 G4TritonEvaporationProbability::G4TritonEvaporationProbability(const G4TritonEvaporationProbability &) : G4EvaporationProbability()
    43 {
    44     throw G4HadronicException(__FILE__, __LINE__, "G4TritonEvaporationProbability::copy_constructor meant to not be accessable");
    45 }
    46 
    47 
    48 
    49 
    50 const G4TritonEvaporationProbability & G4TritonEvaporationProbability::
    51 operator=(const G4TritonEvaporationProbability &)
    52 {
    53     throw G4HadronicException(__FILE__, __LINE__, "G4TritonEvaporationProbability::operator= meant to not be accessable");
    54     return *this;
    55 }
    56 
    57 
    58 G4bool G4TritonEvaporationProbability::operator==(const G4TritonEvaporationProbability &) const
    59 {
    60     return false;
    61 }
    62 
    63 G4bool G4TritonEvaporationProbability::operator!=(const G4TritonEvaporationProbability &) const
    64 {
    65     return true;
    66 }
    67 
    68    G4double G4TritonEvaporationProbability::CalcAlphaParam(const G4Fragment & fragment)
    69   { return 1.0 + CCoeficient(static_cast<G4double>(fragment.GetZ()-GetZ()));}
     42{}
     43
     44G4TritonEvaporationProbability::~G4TritonEvaporationProbability()
     45{}
     46
     47G4double G4TritonEvaporationProbability::CalcAlphaParam(const G4Fragment & fragment)
     48{
     49  return 1.0 + CCoeficient(fragment.GetZ_asInt()-GetZ());
     50}
    7051       
    71   G4double G4TritonEvaporationProbability::CalcBetaParam(const G4Fragment & )
    72   { return 0.0; }
    73 
    74 G4double G4TritonEvaporationProbability::CCoeficient(const G4double aZ)
    75 {
    76     // Data comes from
    77     // Dostrovsky, Fraenkel and Friedlander
    78     // Physical Review, vol 116, num. 3 1959
    79     //
    80     // const G4int size = 5;
    81     // G4double Zlist[5] = { 10.0, 20.0, 30.0, 50.0, 70.0};
    82     // G4double Cp[5] = { 0.50, 0.28, 0.20, 0.15, 0.10};
    83     // C for triton is equal to C for protons divided by 3
    84     G4double C = 0.0;
     52G4double G4TritonEvaporationProbability::CalcBetaParam(const G4Fragment & )
     53{
     54  return 0.0;
     55}
     56
     57G4double G4TritonEvaporationProbability::CCoeficient(G4int aZ)
     58{
     59  // Data comes from
     60  // Dostrovsky, Fraenkel and Friedlander
     61  // Physical Review, vol 116, num. 3 1959
     62  //
     63  // const G4int size = 5;
     64  // G4double Zlist[5] = { 10.0, 20.0, 30.0, 50.0, 70.0};
     65  // G4double Cp[5] = { 0.50, 0.28, 0.20, 0.15, 0.10};
     66  // C for triton is equal to C for protons divided by 3
     67  G4double C = 0.0;
    8568       
    86     if (aZ >= 70) {
    87         C = 0.10;
    88     } else {
    89         C = ((((0.15417e-06*aZ) - 0.29875e-04)*aZ + 0.21071e-02)*aZ - 0.66612e-01)*aZ + 0.98375;
    90     }
     69  if (aZ >= 70) {
     70    C = 0.10;
     71  } else {
     72    C = ((((0.15417e-06*aZ) - 0.29875e-04)*aZ + 0.21071e-02)*aZ - 0.66612e-01)*aZ + 0.98375;
     73  }
    9174       
    92     return C/3.0;
    93        
     75  return C/3.0;
    9476}
    9577
    … …  
    10082//OPT=3,4 Kalbach's parameterization
    10183//
    102 G4double G4TritonEvaporationProbability::CrossSection(const  G4Fragment & fragment, const  G4double K)
     84G4double
     85G4TritonEvaporationProbability::CrossSection(const  G4Fragment & fragment, G4double K)
    10386{
    10487  theA=GetA();
    10588  theZ=GetZ();
    106   ResidualA=fragment.GetA()-theA;
    107   ResidualZ=fragment.GetZ()-theZ;
     89  ResidualA=fragment.GetA_asInt()-theA;
     90  ResidualZ=fragment.GetZ_asInt()-theZ;
    10891 
    109   ResidualAthrd=std::pow(ResidualA,0.33333);
    110   FragmentA=fragment.GetA();
    111   FragmentAthrd=std::pow(FragmentA,0.33333);
    112 
    113  
     92  ResidualAthrd=fG4pow->Z13(ResidualA);
     93  FragmentA=fragment.GetA_asInt();
     94  FragmentAthrd=fG4pow->Z13(FragmentA);
     95
    11496  if (OPTxs==0) {std::ostringstream errOs;
    11597    errOs << "We should'n be here (OPT =0) at evaporation cross section calculation (tritons)!!" 
    … …  
    128110
    129111//
    130 //********************* OPT=1,2 : Chatterjee's cross section ************************
     112//********************* OPT=1,2 : Chatterjee's cross section *****************
    131113//(fitting to cross section from Bechetti & Greenles OM potential)
    132114
    133 G4double G4TritonEvaporationProbability::GetOpt12(const  G4double K)
    134 {
    135 
     115G4double G4TritonEvaporationProbability::GetOpt12(G4double K)
     116{
    136117  G4double Kc=K;
    137118
    138 // JMQ xsec is set constat above limit of validity
    139   if (K>50) Kc=50;
    140 
    141  G4double landa ,mu ,nu ,p , Ec,q,r,ji,xs;
    142 //G4double Eo(0),epsilon1(0),epsilon2(0),discri(0);
    143 
     119  // JMQ xsec is set constat above limit of validity
     120  if (K > 50*MeV) { Kc=50*MeV; }
     121
     122  G4double landa ,mu ,nu ,p , Ec,q,r,ji,xs;
    144123 
    145  G4double    p0 = -11.04;
    146  G4double    p1 = 619.1;
    147  G4double    p2 = -2147.;
    148  G4double    landa0 = -0.0426;
    149  G4double    landa1 = -10.33;
    150  G4double    mu0 = 601.9;
    151  G4double    mu1 = 0.37;
    152  G4double    nu0 = 583.0;
    153  G4double    nu1 = -546.2;
    154  G4double    nu2 = 1.718; 
    155  G4double    delta=1.2;           
    156 
    157  Ec = 1.44*theZ*ResidualZ/(1.5*ResidualAthrd+delta);
    158  p = p0 + p1/Ec + p2/(Ec*Ec);
    159  landa = landa0*ResidualA + landa1;
    160  mu = mu0*std::pow(ResidualA,mu1);
    161  nu = std::pow(ResidualA,mu1)*(nu0 + nu1*Ec + nu2*(Ec*Ec));
    162  q = landa - nu/(Ec*Ec) - 2*p*Ec;
    163  r = mu + 2*nu/Ec + p*(Ec*Ec);
    164 
    165  ji=std::max(Kc,Ec);
    166  if(Kc < Ec) { xs = p*Kc*Kc + q*Kc + r;}
    167  else {xs = p*(Kc - ji)*(Kc - ji) + landa*Kc + mu + nu*(2 - Kc/ji)/ji ;}
    168  
    169  if (xs <0.0) {xs=0.0;}
    170  
    171  return xs;
    172 
     124  G4double    p0 = -11.04;
     125  G4double    p1 = 619.1;
     126  G4double    p2 = -2147.;
     127  G4double    landa0 = -0.0426;
     128  G4double    landa1 = -10.33;
     129  G4double    mu0 = 601.9;
     130  G4double    mu1 = 0.37;
     131  G4double    nu0 = 583.0;
     132  G4double    nu1 = -546.2;
     133  G4double    nu2 = 1.718; 
     134  G4double    delta=1.2;           
     135
     136  Ec = 1.44*theZ*ResidualZ/(1.5*ResidualAthrd+delta);
     137  p = p0 + p1/Ec + p2/(Ec*Ec);
     138  landa = landa0*ResidualA + landa1;
     139
     140  G4double resmu1 = fG4pow->powZ(ResidualA,mu1);
     141  mu = mu0*resmu1;
     142  nu = resmu1*(nu0 + nu1*Ec + nu2*(Ec*Ec));
     143  q = landa - nu/(Ec*Ec) - 2*p*Ec;
     144  r = mu + 2*nu/Ec + p*(Ec*Ec);
     145 
     146  ji=std::max(Kc,Ec);
     147  if(Kc < Ec) { xs = p*Kc*Kc + q*Kc + r;}
     148  else {xs = p*(Kc - ji)*(Kc - ji) + landa*Kc + mu + nu*(2 - Kc/ji)/ji ;}
     149                 
     150  if (xs <0.0) {xs=0.0;}
     151             
     152  return xs;
    173153}
    174154
    175155// *********** OPT=3,4 : Kalbach's cross sections (from PRECO code)*************
    176 G4double G4TritonEvaporationProbability::GetOpt34(const  G4double K)
     156G4double G4TritonEvaporationProbability::GetOpt34(G4double K)
    177157//     ** t from o.m. of hafele, flynn et al
    178158{
    179  
    180159  G4double landa, mu, nu, p , signor(1.),sig;
    181160  G4double ec,ecsq,xnulam,etest(0.),a;
    182161  G4double b,ecut,cut,ecut2,geom,elab;
    183  
    184  
     162
    185163  G4double     flow = 1.e-18;
    186164  G4double     spill= 1.e+18;
    … …  
    205183  p = p0 + p1/ec + p2/ecsq;
    206184  landa = landa0*ResidualA + landa1;
    207   a = std::pow(ResidualA,mu1);
     185  a = fG4pow->powZ(ResidualA,mu1);
    208186  mu = mu0 * a;
    209187  nu = a* (nu0+nu1*ec+nu2*ecsq); 
    210188  xnulam = nu / landa;
    211   if (xnulam > spill) xnulam=0.;
    212   if (xnulam >= flow) etest = 1.2 *std::sqrt(xnulam);
    213   
     189  if (xnulam > spill) { xnulam=0.; }
     190  if (xnulam >= flow) { etest = 1.2 *std::sqrt(xnulam); }
     191 
    214192  a = -2.*p*ec + landa - nu/ecsq;
    215193  b = p*ecsq + mu + 2.*nu/ec;
    216194  ecut = 0.;
    217195  cut = a*a - 4.*p*b;
    218   if (cut > 0.) ecut = std::sqrt(cut);
     196  if (cut > 0.) { ecut = std::sqrt(cut); }
    219197  ecut = (ecut-a) / (p+p);
    220198  ecut2 = ecut;
    221 //JMQ 290310 for avoiding unphysical increase below minimum (at ecut)
    222 //ecut<0 means that there is no cut with energy axis, i.e. xs is set to 0 bellow minimum
    223 //  if (cut < 0.) ecut2 = ecut - 2.;
    224   if (cut < 0.) ecut2 = ecut;
    225   elab = K * FragmentA / ResidualA;
     199  //JMQ 290310 for avoiding unphysical increase below minimum (at ecut)
     200  // ecut<0 means that there is no cut with energy axis, i.e. xs is set
     201  // to 0 bellow minimum
     202  //  if (cut < 0.) ecut2 = ecut - 2.;
     203  if (cut < 0.) { ecut2 = ecut; }
     204  elab = K * FragmentA / G4double(ResidualA);
    226205  sig = 0.;
    227 
     206 
    228207  if (elab <= ec) { //start for E<Ec
    229     if (elab > ecut2)  sig = (p*elab*elab+a*elab+b) * signor;
     208    if (elab > ecut2) { sig = (p*elab*elab+a*elab+b) * signor; }
    230209  }           //end for E<Ec
    231   else {           //start for E>Ec 
     210  else {           //start for E>Ec
    232211    sig = (landa*elab+mu+nu/elab) * signor;
    233212    geom = 0.;
    234     if (xnulam < flow || elab < etest) return sig;
     213    if (xnulam < flow || elab < etest) { return sig; }
    235214    geom = std::sqrt(theA*K);
    236215    geom = 1.23*ResidualAthrd + ra + 4.573/geom;
    … …  
    239218  }           //end for E>Ec
    240219  return sig;
    241  
    242 }
    243 
    244 //   ************************** end of cross sections *******************************
    245 
     220}
     221
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