source: trunk/source/processes/electromagnetic/xrays/include/G4GammaXTRadiator.hh @ 1244

Last change on this file since 1244 was 1228, checked in by garnier, 15 years ago

update geant4.9.3 tag

File size: 3.1 KB
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25//
26//
27// $Id: G4GammaXTRadiator.hh,v 1.4 2006/06/29 19:55:35 gunter Exp $
28// GEANT4 tag $Name: geant4-09-03 $
29//
30//
31///////////////////////////////////////////////////////////////////////////
32//
33// Rough process describing a radiator of X-ray transition radiation. 
34// Thicknesses of plates and gas gaps are distributed according to gamma
35// distribution. x are thicknesses of plates or gas gaps:
36//
37// p(x) = (alpha/<x>)^alpha * x^(alpha-1) * std::exp(-alpha*x/<x>) / G(alpha)
38//
39// G(alpha) is Euler's gamma function.
40// Plates have mean <x> = fPlateThick > 0 and power alpha = fAlphaPlate > 0 :
41// Gas gaps have mean <x> = fGasThick > 0 and power alpha = fAlphaGas > 0 :
42// We suppose that:
43// formation zone ~ mean thickness << absorption length
44// for each material and in the range 1-100 keV. This allows us to simplify
45// interference effects in radiator stack (GetStackFactor method).
46//
47//
48// History:
49// 21.01.02 V. Grichine, first version
50//
51
52
53#ifndef G4GammaXTRadiator_h
54#define G4GammaXTRadiator_h 1
55
56#include "G4VXTRenergyLoss.hh"
57
58class G4GammaXTRadiator : public G4VXTRenergyLoss
59{
60public:
61
62   G4GammaXTRadiator (G4LogicalVolume *anEnvelope,
63                           G4double,G4double,
64                           G4Material*,G4Material*,
65                        G4double,G4double,G4int,
66                        const G4String & processName = "XTRgammaRadiator");
67  ~G4GammaXTRadiator ();
68
69  // Pure virtual function from base class
70
71  G4double GetStackFactor( G4double energy, G4double gamma, G4double varAngle);
72
73private:
74
75};
76
77#endif
78
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