79 CLHEP::twopi*CLHEP::classic_electr_radius*CLHEP::classic_electr_radius;
81 CLHEP::electron_mass_c2*CLHEP::Bohr_radius*CLHEP::Bohr_radius
82 /(CLHEP::hbarc*CLHEP::hbarc);
84 ((
Tlim+CLHEP::electron_mass_c2)*(
Tlim+CLHEP::electron_mass_c2));
86 (CLHEP::electron_mass_c2*CLHEP::electron_mass_c2);
158 mass = proton_mass_c2;
205 static const G4double epsmin = 1.e-4 , epsmax = 1.e10;
207 static const G4double Zdat[15] = { 4., 6., 13., 20., 26., 29., 32., 38.,47.,
208 50., 56., 64., 74., 79., 82. };
211 static const G4double celectron[15][22] =
212 {{1.125,1.072,1.051,1.047,1.047,1.050,1.052,1.054,
213 1.054,1.057,1.062,1.069,1.075,1.090,1.105,1.111,
214 1.112,1.108,1.100,1.093,1.089,1.087 },
215 {1.408,1.246,1.143,1.096,1.077,1.059,1.053,1.051,
216 1.052,1.053,1.058,1.065,1.072,1.087,1.101,1.108,
217 1.109,1.105,1.097,1.090,1.086,1.082 },
218 {2.833,2.268,1.861,1.612,1.486,1.309,1.204,1.156,
219 1.136,1.114,1.106,1.106,1.109,1.119,1.129,1.132,
220 1.131,1.124,1.113,1.104,1.099,1.098 },
221 {3.879,3.016,2.380,2.007,1.818,1.535,1.340,1.236,
222 1.190,1.133,1.107,1.099,1.098,1.103,1.110,1.113,
223 1.112,1.105,1.096,1.089,1.085,1.098 },
224 {6.937,4.330,2.886,2.256,1.987,1.628,1.395,1.265,
225 1.203,1.122,1.080,1.065,1.061,1.063,1.070,1.073,
226 1.073,1.070,1.064,1.059,1.056,1.056 },
227 {9.616,5.708,3.424,2.551,2.204,1.762,1.485,1.330,
228 1.256,1.155,1.099,1.077,1.070,1.068,1.072,1.074,
229 1.074,1.070,1.063,1.059,1.056,1.052 },
230 {11.72,6.364,3.811,2.806,2.401,1.884,1.564,1.386,
231 1.300,1.180,1.112,1.082,1.073,1.066,1.068,1.069,
232 1.068,1.064,1.059,1.054,1.051,1.050 },
233 {18.08,8.601,4.569,3.183,2.662,2.025,1.646,1.439,
234 1.339,1.195,1.108,1.068,1.053,1.040,1.039,1.039,
235 1.039,1.037,1.034,1.031,1.030,1.036 },
236 {18.22,10.48,5.333,3.713,3.115,2.367,1.898,1.631,
237 1.498,1.301,1.171,1.105,1.077,1.048,1.036,1.033,
238 1.031,1.028,1.024,1.022,1.021,1.024 },
239 {14.14,10.65,5.710,3.929,3.266,2.453,1.951,1.669,
240 1.528,1.319,1.178,1.106,1.075,1.040,1.027,1.022,
241 1.020,1.017,1.015,1.013,1.013,1.020 },
242 {14.11,11.73,6.312,4.240,3.478,2.566,2.022,1.720,
243 1.569,1.342,1.186,1.102,1.065,1.022,1.003,0.997,
244 0.995,0.993,0.993,0.993,0.993,1.011 },
245 {22.76,20.01,8.835,5.287,4.144,2.901,2.219,1.855,
246 1.677,1.410,1.224,1.121,1.073,1.014,0.986,0.976,
247 0.974,0.972,0.973,0.974,0.975,0.987 },
248 {50.77,40.85,14.13,7.184,5.284,3.435,2.520,2.059,
249 1.837,1.512,1.283,1.153,1.091,1.010,0.969,0.954,
250 0.950,0.947,0.949,0.952,0.954,0.963 },
251 {65.87,59.06,15.87,7.570,5.567,3.650,2.682,2.182,
252 1.939,1.579,1.325,1.178,1.108,1.014,0.965,0.947,
253 0.941,0.938,0.940,0.944,0.946,0.954 },
254 {55.60,47.34,15.92,7.810,5.755,3.767,2.760,2.239,
255 1.985,1.609,1.343,1.188,1.113,1.013,0.960,0.939,
256 0.933,0.930,0.933,0.936,0.939,0.949 }};
258 static const G4double cpositron[15][22] = {
259 {2.589,2.044,1.658,1.446,1.347,1.217,1.144,1.110,
260 1.097,1.083,1.080,1.086,1.092,1.108,1.123,1.131,
261 1.131,1.126,1.117,1.108,1.103,1.100 },
262 {3.904,2.794,2.079,1.710,1.543,1.325,1.202,1.145,
263 1.122,1.096,1.089,1.092,1.098,1.114,1.130,1.137,
264 1.138,1.132,1.122,1.113,1.108,1.102 },
265 {7.970,6.080,4.442,3.398,2.872,2.127,1.672,1.451,
266 1.357,1.246,1.194,1.179,1.178,1.188,1.201,1.205,
267 1.203,1.190,1.173,1.159,1.151,1.145 },
268 {9.714,7.607,5.747,4.493,3.815,2.777,2.079,1.715,
269 1.553,1.353,1.253,1.219,1.211,1.214,1.225,1.228,
270 1.225,1.210,1.191,1.175,1.166,1.174 },
271 {17.97,12.95,8.628,6.065,4.849,3.222,2.275,1.820,
272 1.624,1.382,1.259,1.214,1.202,1.202,1.214,1.219,
273 1.217,1.203,1.184,1.169,1.160,1.151 },
274 {24.83,17.06,10.84,7.355,5.767,3.707,2.546,1.996,
275 1.759,1.465,1.311,1.252,1.234,1.228,1.238,1.241,
276 1.237,1.222,1.201,1.184,1.174,1.159 },
277 {23.26,17.15,11.52,8.049,6.375,4.114,2.792,2.155,
278 1.880,1.535,1.353,1.281,1.258,1.247,1.254,1.256,
279 1.252,1.234,1.212,1.194,1.183,1.170 },
280 {22.33,18.01,12.86,9.212,7.336,4.702,3.117,2.348,
281 2.015,1.602,1.385,1.297,1.268,1.251,1.256,1.258,
282 1.254,1.237,1.214,1.195,1.185,1.179 },
283 {33.91,24.13,15.71,10.80,8.507,5.467,3.692,2.808,
284 2.407,1.873,1.564,1.425,1.374,1.330,1.324,1.320,
285 1.312,1.288,1.258,1.235,1.221,1.205 },
286 {32.14,24.11,16.30,11.40,9.015,5.782,3.868,2.917,
287 2.490,1.925,1.596,1.447,1.391,1.342,1.332,1.327,
288 1.320,1.294,1.264,1.240,1.226,1.214 },
289 {29.51,24.07,17.19,12.28,9.766,6.238,4.112,3.066,
290 2.602,1.995,1.641,1.477,1.414,1.356,1.342,1.336,
291 1.328,1.302,1.270,1.245,1.231,1.233 },
292 {38.19,30.85,21.76,15.35,12.07,7.521,4.812,3.498,
293 2.926,2.188,1.763,1.563,1.484,1.405,1.382,1.371,
294 1.361,1.330,1.294,1.267,1.251,1.239 },
295 {49.71,39.80,27.96,19.63,15.36,9.407,5.863,4.155,
296 3.417,2.478,1.944,1.692,1.589,1.480,1.441,1.423,
297 1.409,1.372,1.330,1.298,1.280,1.258 },
298 {59.25,45.08,30.36,20.83,16.15,9.834,6.166,4.407,
299 3.641,2.648,2.064,1.779,1.661,1.531,1.482,1.459,
300 1.442,1.400,1.354,1.319,1.299,1.272 },
301 {56.38,44.29,30.50,21.18,16.51,10.11,6.354,4.542,
302 3.752,2.724,2.116,1.817,1.692,1.554,1.499,1.474,
303 1.456,1.412,1.364,1.328,1.307,1.282 }};
307 static const G4double hecorr[15] = {
308 120.70, 117.50, 105.00, 92.92, 79.23, 74.510, 68.29,
309 57.39, 41.97, 36.14, 24.53, 10.21, -7.855, -16.84,
321 G4double eKineticEnergy = KineticEnergy;
323 if(
mass > electron_mass_c2)
326 G4double c =
mass*TAU*(TAU+2.)/(electron_mass_c2*(TAU+1.)) ;
328 G4double tau = 0.5*(w+sqrt(w*w+4.*c)) ;
329 eKineticEnergy = electron_mass_c2*tau ;
332 G4double eTotalEnergy = eKineticEnergy + electron_mass_c2 ;
333 G4double beta2 = eKineticEnergy*(eTotalEnergy+electron_mass_c2)
334 /(eTotalEnergy*eTotalEnergy);
335 G4double bg2 = eKineticEnergy*(eTotalEnergy+electron_mass_c2)
336 /(electron_mass_c2*electron_mass_c2);
340 if (eps<epsmin) sigma = 2.*eps*
eps;
341 else if(eps<epsmax) sigma =
G4Log(1.+2.*eps)-2.*eps/(1.+2.*
eps);
342 else sigma =
G4Log(2.*eps)-1.+1./
eps;
344 sigma *=
ChargeSquare*AtomicNumber*AtomicNumber/(beta2*bg2);
351 while ((iZ>=0)&&(Zdat[iZ]>=AtomicNumber)) iZ -= 1;
357 G4double ratZ = (AtomicNumber-ZZ1)*(AtomicNumber+ZZ1)/
358 ((ZZ2-ZZ1)*(ZZ2+ZZ1));
360 if(eKineticEnergy <=
Tlim)
364 while ((iT>=0)&&(
Tdat[iT]>=eKineticEnergy)) iT -= 1;
370 G4double b2small = T*(E+electron_mass_c2)/(E*E);
372 T =
Tdat[iT+1]; E = T + electron_mass_c2;
373 G4double b2big = T*(E+electron_mass_c2)/(E*E);
374 G4double ratb2 = (beta2-b2small)/(b2big-b2small);
378 c1 = celectron[iZ][iT];
379 c2 = celectron[iZ+1][iT];
380 cc1 = c1+ratZ*(c2-
c1);
382 c1 = celectron[iZ][iT+1];
383 c2 = celectron[iZ+1][iT+1];
384 cc2 = c1+ratZ*(c2-
c1);
386 corr = cc1+ratb2*(cc2-cc1);
392 c1 = cpositron[iZ][iT];
393 c2 = cpositron[iZ+1][iT];
394 cc1 = c1+ratZ*(c2-
c1);
396 c1 = cpositron[iZ][iT+1];
397 c2 = cpositron[iZ+1][iT+1];
398 cc2 = c1+ratZ*(c2-
c1);
400 corr = cc1+ratb2*(cc2-cc1);
409 if((AtomicNumber >= ZZ1) && (AtomicNumber <= ZZ2))
410 sigma = c1+ratZ*(c2-
c1) ;
411 else if(AtomicNumber < ZZ1)
412 sigma = AtomicNumber*AtomicNumber*c1/(ZZ1*ZZ1);
413 else if(AtomicNumber > ZZ2)
414 sigma = AtomicNumber*AtomicNumber*c2/(ZZ2*ZZ2);
514 rat = 1.e-3/(rat*(10.+rat)) ;
643 rat = 1.e-3/(rat*(10 + rat)) ;
704 if(
charge > 0.) index = 2;
713 rat = 1.e-3/(rat*(10 + rat)) ;
889 if(tlength < geomStepLength) { tlength = geomStepLength; }
933 G4double sth = sqrt((1.0 - cth)*(1.0 + cth));
939 newDirection.rotateUz(oldDirection);
966 latcorr =
min(latcorr, r);
971 if(std::abs(r*sth) < latcorr)
977 G4double psi = std::acos(latcorr/(r*sth));
984 dirx = std::cos(Phi);
985 diry = std::sin(Phi);
1023 static const G4double numlim = 0.01;
1026 xmeanth = 1.0 - tau*(1.0 - 0.5*tau);
1027 x2meanth= 1.0 - tau*(5.0 - 6.25*tau)/3.;
1029 xmeanth =
G4Exp(-tau);
1030 x2meanth = (1.+2.*
G4Exp(-2.5*tau))/3.;
1039 G4bool extremesmallstep = false ;
1042 if(trueStepLength > tsmall) {
1045 G4double rate = trueStepLength/tsmall ;
1048 extremesmallstep = true ;
1057 if(theta2 <
tausmall) {
return cth; }
1063 G4double x = theta2*(1.0 - theta2/12.);
1064 if(theta2 > numlim) {
1093 if(fabs(c-3.) < 0.001) { c = 3.001; }
1094 else if(fabs(c-2.) < 0.001) { c = 2.001; }
1100 G4double xmean1 = 1.-(1.-(1.+xsi)*ea)*x/eaa;
1105 if(xmean1 <= 0.999*xmeanth) {
1118 G4double xmean2 = (x0 + d - (bx - b1*d)/(c-2.))/(1. - d);
1124 G4double qprob = xmeanth/(prob*xmean1+(1.-prob)*xmean2);
1137 if(var < numlim*d) {
1139 cth = -1.0 + var*(1.0 - 0.5*var*c)*(2. + (c - xsi)*x);
1141 cth = 1. + x*(c - xsi - c*
G4Exp(-
G4Log(var + d)/c1));
G4ParticleChangeForMSC * fParticleChange
static G4Pow * GetInstance()
ThreeVector shoot(const G4int Ap, const G4int Af)
static c2_factory< G4double > c2
virtual void StartTracking(G4Track *)
static G4LossTableManager * Instance()
G4UrbanMscModel(const G4String &nam="UrbanMsc")
G4double GetTotNbOfElectPerVolume() const
G4double GetKineticEnergy() const
CLHEP::Hep3Vector G4ThreeVector
const G4DynamicParticle * GetDynamicParticle() const
virtual ~G4UrbanMscModel()
static const G4double Tdat[22]
G4ThreeVector & SampleScattering(const G4ThreeVector &, G4double safety)
G4bool latDisplasmentbackup
G4double GetProductionCut(G4int index) const
G4StepStatus GetStepStatus() const
G4double ConvertTrueToGeom(G4double &tLength, G4double &gLength)
const G4MaterialCutsCouple * GetMaterialCutsCouple() const
static const G4double eps
G4ParticleDefinition * GetDefinition() const
const G4ParticleDefinition * particle
G4double currentRadLength
const G4Step * GetStep() const
G4double ComputeSafety(const G4ThreeVector &position, G4double limit=DBL_MAX)
static const G4double Tlim
G4int currentMaterialIndex
G4double SampleCosineTheta(G4double trueStepLength, G4double KineticEnergy)
static const G4double bg2lim
G4StepPoint * GetPreStepPoint() const
G4double GetEnergy(const G4ParticleDefinition *part, G4double range, const G4MaterialCutsCouple *couple)
CLHEP::HepRandomEngine * rndmEngineMod
const G4ThreeVector & GetPosition() const
G4double GetRange(const G4ParticleDefinition *part, G4double kineticEnergy, const G4MaterialCutsCouple *couple)
G4ParticleChangeForMSC * GetParticleChangeForMSC(const G4ParticleDefinition *p=0)
G4double ComputeGeomPathLength(G4double truePathLength)
static const G4double beta2lim
const G4MaterialCutsCouple * couple
G4double ComputeGeomLimit(const G4Track &, G4double &presafety, G4double limit)
G4ThreeVector fDisplacement
G4double ComputeTrueStepLength(G4double geomStepLength)
G4double GetTransportMeanFreePath(const G4ParticleDefinition *part, G4double kinEnergy)
G4double GetRadlen() const
G4double G4Log(G4double x)
G4double G4Exp(G4double initial_x)
Exponential Function double precision.
void SetParticle(const G4ParticleDefinition *)
G4double GetTotNbOfAtomsPerVolume() const
G4double LatCorrelation()
void ProposeMomentumDirection(const G4ThreeVector &Pfinal)
void Initialise(const G4ParticleDefinition *, const G4DataVector &)
static const G4double sigmafactor
G4LossTableManager * theManager
static const G4double epsfactor
T max(const T t1, const T t2)
brief Return the largest of the two arguments
G4double GetDEDX(const G4ParticleDefinition *part, G4double kineticEnergy, const G4MaterialCutsCouple *couple)
void SetCurrentCouple(const G4MaterialCutsCouple *)
T min(const T t1, const T t2)
brief Return the smallest of the two arguments
G4double GetSafety() const
G4double Z23(G4int Z) const
G4MscStepLimitType steppingAlgorithm
G4double currentKinEnergy
G4double ComputeTheta0(G4double truePathLength, G4double KineticEnergy)
static const G4double sig0[15]
G4ProductionCuts * GetProductionCuts() const
G4double SimpleScattering(G4double xmeanth, G4double x2meanth)
void StartTracking(G4Track *)
G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition *particle, G4double KineticEnergy, G4double AtomicNumber, G4double AtomicWeight=0., G4double cut=0., G4double emax=DBL_MAX)
const G4Material * GetMaterial() const
G4double ComputeTruePathLengthLimit(const G4Track &track, G4double ¤tMinimalStep)