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/G4DeuteronEvaporationProbability.cc

    r1315 r1347  
    2424// ********************************************************************
    2525//
    26 //J.M. Quesada (August2008). Based on:
     26// $Id: G4DeuteronEvaporationProbability.cc,v 1.20 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
    … …  
    3842G4DeuteronEvaporationProbability::G4DeuteronEvaporationProbability() :
    3943    G4EvaporationProbability(2,1,3,&theCoulombBarrier) // A,Z,Gamma (fixed JMQ)
    40 {       }
    41 G4DeuteronEvaporationProbability::G4DeuteronEvaporationProbability(const G4DeuteronEvaporationProbability &) : G4EvaporationProbability()
    42 {
    43     throw G4HadronicException(__FILE__, __LINE__, "G4DeuteronEvaporationProbability::copy_constructor meant to not be accessable");
    44 }
    45 
    46 
    47 const G4DeuteronEvaporationProbability & G4DeuteronEvaporationProbability::
    48 operator=(const G4DeuteronEvaporationProbability &)
    49 {
    50     throw G4HadronicException(__FILE__, __LINE__, "G4DeuteronEvaporationProbability::operator= meant to not be accessable");
    51     return *this;
    52 }
    53 
    54 
    55 G4bool G4DeuteronEvaporationProbability::operator==(const G4DeuteronEvaporationProbability &) const
    56 {
    57     return false;
    58 }
    59 
    60 
    61 G4bool G4DeuteronEvaporationProbability::operator!=(const G4DeuteronEvaporationProbability &) const
    62 {
    63     return true;
    64 }
    65 
     44{}
     45
     46G4DeuteronEvaporationProbability::~G4DeuteronEvaporationProbability()
     47{}
    6648
    6749G4double G4DeuteronEvaporationProbability::CalcAlphaParam(const G4Fragment & fragment)
    6850{
    69     return 1.0 + CCoeficient(static_cast<G4double>(fragment.GetZ()-GetZ()));
    70 }
    71 
     51  return 1.0 + CCoeficient(fragment.GetZ_asInt()-GetZ());
     52}
    7253
    7354G4double G4DeuteronEvaporationProbability::CalcBetaParam(const G4Fragment & )
    7455{
    75     return 0.0;
    76 }
    77 
    78 
    79 G4double G4DeuteronEvaporationProbability::CCoeficient(const G4double aZ)
    80 {
    81     // Data comes from
    82     // Dostrovsky, Fraenkel and Friedlander
    83     // Physical Review, vol 116, num. 3 1959
    84     //
    85     // const G4int size = 5;
    86     // G4double Zlist[5] = { 10.0, 20.0, 30.0, 50.0, 70.0};
    87     // G4double Cp[5] = { 0.50, 0.28, 0.20, 0.15, 0.10};
    88     // C for deuteron is equal to C for protons divided by 2
    89     G4double C = 0.0;
     56  return 0.0;
     57}
     58
     59G4double G4DeuteronEvaporationProbability::CCoeficient(G4int aZ)
     60{
     61  // Data comes from
     62  // Dostrovsky, Fraenkel and Friedlander
     63  // Physical Review, vol 116, num. 3 1959
     64  //
     65  // const G4int size = 5;
     66  // G4double Zlist[5] = { 10.0, 20.0, 30.0, 50.0, 70.0};
     67  // G4double Cp[5] = { 0.50, 0.28, 0.20, 0.15, 0.10};
     68  // C for deuteron is equal to C for protons divided by 2
     69  G4double C = 0.0;
    9070       
    91     if (aZ >= 70) {
    92         C = 0.10;
    93     } else {
    94         C = ((((0.15417e-06*aZ) - 0.29875e-04)*aZ + 0.21071e-02)*aZ - 0.66612e-01)*aZ + 0.98375;
    95     }
     71  if (aZ >= 70) {
     72    C = 0.10;
     73  } else {
     74    C = ((((0.15417e-06*aZ) - 0.29875e-04)*aZ + 0.21071e-02)*aZ - 0.66612e-01)*aZ + 0.98375;
     75  }
    9676       
    97     return C/2.0;
     77  return C/2.0;
    9878       
    9979}
    … …  
    10686//OPT=3,4 Kalbach's parameterization
    10787//
    108 G4double G4DeuteronEvaporationProbability::CrossSection(const  G4Fragment & fragment, const  G4double K)
    109 {
    110        theA=GetA();
    111        theZ=GetZ();
    112        ResidualA=fragment.GetA()-theA;
    113        ResidualZ=fragment.GetZ()-theZ;
     88G4double
     89G4DeuteronEvaporationProbability::CrossSection(const  G4Fragment & fragment, G4double K)
     90{
     91  theA=GetA();
     92  theZ=GetZ();
     93  ResidualA=fragment.GetA_asInt()-theA;
     94  ResidualZ=fragment.GetZ_asInt()-theZ;
     95 
     96  ResidualAthrd=fG4pow->Z13(ResidualA);
     97  FragmentA=fragment.GetA_asInt();
     98  FragmentAthrd=fG4pow->Z13(FragmentA);
     99
     100  if (OPTxs==0) {std::ostringstream errOs;
     101  errOs << "We should'n be here (OPT =0) at evaporation cross section calculation (deuterons)!!" 
     102        <<G4endl;
     103  throw G4HadronicException(__FILE__, __LINE__, errOs.str());
     104  return 0.;}
     105  if( OPTxs==1 || OPTxs==2) return G4DeuteronEvaporationProbability::GetOpt12( K);
     106  else if (OPTxs==3 || OPTxs==4)  return G4DeuteronEvaporationProbability::GetOpt34( K);
     107  else{
     108    std::ostringstream errOs;
     109    errOs << "BAD Deuteron CROSS SECTION OPTION AT EVAPORATION!!"  <<G4endl;
     110    throw G4HadronicException(__FILE__, __LINE__, errOs.str());
     111    return 0.;
     112  }
     113}
     114
     115//
     116//********************* OPT=1,2 : Chatterjee's cross section ********************
     117//(fitting to cross section from Bechetti & Greenles OM potential)
     118
     119G4double G4DeuteronEvaporationProbability::GetOpt12(G4double K)
     120{
     121  G4double Kc = K;
     122
     123  // JMQ xsec is set constat above limit of validity
     124  if (K > 50*MeV) { Kc = 50*MeV; }
     125
     126  G4double landa ,mu ,nu ,p , Ec,q,r,ji,xs;
    114127 
    115        ResidualAthrd=std::pow(ResidualA,0.33333);
    116        FragmentA=fragment.GetA();
    117        FragmentAthrd=std::pow(FragmentA,0.33333);
    118 
    119        if (OPTxs==0) {std::ostringstream errOs;
    120          errOs << "We should'n be here (OPT =0) at evaporation cross section calculation (deuterons)!!"  <<G4endl;
    121          throw G4HadronicException(__FILE__, __LINE__, errOs.str());
    122          return 0.;}
    123        if( OPTxs==1 || OPTxs==2) return G4DeuteronEvaporationProbability::GetOpt12( K);
    124        else if (OPTxs==3 || OPTxs==4)  return G4DeuteronEvaporationProbability::GetOpt34( K);
    125        else{
    126          std::ostringstream errOs;
    127          errOs << "BAD Deuteron CROSS SECTION OPTION AT EVAPORATION!!"  <<G4endl;
    128          throw G4HadronicException(__FILE__, __LINE__, errOs.str());
    129          return 0.;
    130        }
    131 }
    132 
    133 
    134 //********************* OPT=1,2 : Chatterjee's cross section ************************
    135 //(fitting to cross section from Bechetti & Greenles OM potential)
    136 
    137 G4double G4DeuteronEvaporationProbability::GetOpt12(const  G4double K)
    138 {
    139 
    140   G4double Kc=K;
    141 
    142 // JMQ xsec is set constat above limit of validity
    143  if (K>50) Kc=50;
    144 
    145  G4double landa ,mu ,nu ,p , Ec,q,r,ji,xs;
    146 
    147  
    148  G4double    p0 = -38.21;
    149  G4double    p1 = 922.6;
    150  G4double    p2 = -2804.;
    151  G4double    landa0 = -0.0323;
    152  G4double    landa1 = -5.48;
    153  G4double    mu0 = 336.1;
    154  G4double    mu1 = 0.48;
    155  G4double    nu0 = 524.3;
    156  G4double    nu1 = -371.8;
    157  G4double    nu2 = -5.924; 
    158  G4double    delta=1.2;           
    159  
    160 
    161  Ec = 1.44*theZ*ResidualZ/(1.5*ResidualAthrd+delta);
    162  p = p0 + p1/Ec + p2/(Ec*Ec);
    163  landa = landa0*ResidualA + landa1;
    164  mu = mu0*std::pow(ResidualA,mu1);
    165  nu = std::pow(ResidualA,mu1)*(nu0 + nu1*Ec + nu2*(Ec*Ec));
    166  q = landa - nu/(Ec*Ec) - 2*p*Ec;
    167  r = mu + 2*nu/Ec + p*(Ec*Ec);
    168  
    169  ji=std::max(Kc,Ec);
    170  if(Kc < Ec) { xs = p*Kc*Kc + q*Kc + r;}
    171  else {xs = p*(Kc - ji)*(Kc - ji) + landa*Kc + mu + nu*(2 - Kc/ji)/ji ;}
     128  G4double    p0 = -38.21;
     129  G4double    p1 = 922.6;
     130  G4double    p2 = -2804.;
     131  G4double    landa0 = -0.0323;
     132  G4double    landa1 = -5.48;
     133  G4double    mu0 = 336.1;
     134  G4double    mu1 = 0.48;
     135  G4double    nu0 = 524.3;
     136  G4double    nu1 = -371.8;
     137  G4double    nu2 = -5.924; 
     138  G4double    delta=1.2;           
     139
     140  Ec = 1.44*theZ*ResidualZ/(1.5*ResidualAthrd+delta);
     141  p = p0 + p1/Ec + p2/(Ec*Ec);
     142  landa = landa0*ResidualA + landa1;
     143  G4double resmu1 = fG4pow->powZ(ResidualA,mu1);
     144  mu = mu0*resmu1;
     145  nu = resmu1*(nu0 + nu1*Ec + nu2*(Ec*Ec));
     146  q = landa - nu/(Ec*Ec) - 2*p*Ec;
     147  r = mu + 2*nu/Ec + p*(Ec*Ec);
     148
     149  ji=std::max(Kc,Ec);
     150  if(Kc < Ec) { xs = p*Kc*Kc + q*Kc + r;}
     151  else {xs = p*(Kc - ji)*(Kc - ji) + landa*Kc + mu + nu*(2 - Kc/ji)/ji ;}
    172152                 
    173  if (xs <0.0) {xs=0.0;}
    174  
    175  return xs;
    176 
    177 }
    178 
     153  if (xs <0.0) {xs=0.0;}
     154             
     155  return xs;
     156}
    179157
    180158// *********** OPT=3,4 : Kalbach's cross sections (from PRECO code)*************
    181 G4double G4DeuteronEvaporationProbability::GetOpt34(const  G4double K)
     159G4double G4DeuteronEvaporationProbability::GetOpt34(G4double K)
    182160//     ** d from o.m. of perey and perey
    183161{
    184162
    185   G4double landa, mu, nu, p , signor(1.),sig;
     163  G4double landa, mu, nu, p ,signor(1.),sig;
    186164  G4double ec,ecsq,xnulam,etest(0.),a;
    187165  G4double b,ecut,cut,ecut2,geom,elab;
    188166
    189 
    190167  G4double     flow = 1.e-18;
    191168  G4double     spill= 1.e+18;
    192 
    193169
    194170  G4double     p0 = 0.798;
    … …  
    202178  G4double     nu1 = -474.5;
    203179  G4double     nu2 = -3.592;     
    204   
    205   G4double      ra=0.80;
     180 
     181  G4double     ra=0.80;
    206182       
    207183  //JMQ 13/02/09 increase of reduced radius to lower the barrier
    208   //  ec = 1.44 * theZ * ResidualZ / (1.5*ResidualAthrd+ra);
    209    ec = 1.44 * theZ * ResidualZ / (1.7*ResidualAthrd+ra);
    210 
     184  // ec = 1.44 * theZ * ResidualZ / (1.5*ResidualAthrd+ra);
     185  ec = 1.44 * theZ * ResidualZ / (1.7*ResidualAthrd+ra);
    211186  ecsq = ec * ec;
    212187  p = p0 + p1/ec + p2/ecsq;
    213188  landa = landa0*ResidualA + landa1;
    214   a = std::pow(ResidualA,mu1);
     189  a = fG4pow->powZ(ResidualA,mu1);
    215190  mu = mu0 * a;
    216191  nu = a* (nu0+nu1*ec+nu2*ecsq); 
    217192  xnulam = nu / landa;
    218   if (xnulam > spill) xnulam=0.;
    219   if (xnulam >= flow) etest = 1.2 *std::sqrt(xnulam);
     193  if (xnulam > spill) { xnulam=0.; }
     194  if (xnulam >= flow) { etest = 1.2 *std::sqrt(xnulam); }
    220195
    221196  a = -2.*p*ec + landa - nu/ecsq;
    … …  
    223198  ecut = 0.;
    224199  cut = a*a - 4.*p*b;
    225   if (cut > 0.) ecut = std::sqrt(cut);
     200  if (cut > 0.) { ecut = std::sqrt(cut); }
    226201  ecut = (ecut-a) / (p+p);
    227202  ecut2 = ecut;
    228 //JMQ 290310 for avoiding unphysical increase below minimum (at ecut)
    229 //ecut<0 means that there is no cut with energy axis, i.e. xs is set to 0 bellow minimum
    230 //  if (cut < 0.) ecut2 = ecut - 2.;
    231   if (cut < 0.) ecut2 = ecut;
    232   elab = K * FragmentA / ResidualA;
     203  //JMQ 290310 for avoiding unphysical increase below minimum (at ecut)
     204  //ecut<0 means that there is no cut with energy axis, i.e. xs is set
     205  //to 0 bellow minimum
     206  //  if (cut < 0.) ecut2 = ecut - 2.;
     207  if (cut < 0.) { ecut2 = ecut; }
     208  elab = K * FragmentA / G4double(ResidualA);
    233209  sig = 0.;
    234210
    235211  if (elab <= ec) { //start for E<Ec
    236     if (elab > ecut2)  sig = (p*elab*elab+a*elab+b) * signor;
     212    if (elab > ecut2) { sig = (p*elab*elab+a*elab+b) * signor; }
    237213  }           //end for E<Ec
    238214  else {           //start for E>Ec
    239215    sig = (landa*elab+mu+nu/elab) * signor;
    240216    geom = 0.;
    241     if (xnulam < flow || elab < etest) return sig;
     217    if (xnulam < flow || elab < etest) { return sig; }
    242218    geom = std::sqrt(theA*K);
    243219    geom = 1.23*ResidualAthrd + ra + 4.573/geom;
    … …  
    246222  }           //end for E>Ec
    247223  return sig;
    248  
    249 }
    250 
    251 //   ************************** end of cross sections *******************************
     224}
     225
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