A double-Gaussian spectrum. More...
Inheritance diagram for EGS_DoubleGaussianSpectrum:
Public Member Functions | |
| EGS_DoubleGaussianSpectrum (EGS_Float mean_energy, EGS_Float sig_left, EGS_Float sig_right) | |
| Construct a double-Gaussian spectrum with mean energy mean_energy and widths sig_left and sig_right. | |
| EGS_Float | maxEnergy () const |
| EGS_Float | expectedAverage () const |
 Public Member Functions inherited from EGS_BaseSpectrum | |
| EGS_BaseSpectrum () | |
| Constructor. More... | |
| virtual | ~EGS_BaseSpectrum () |
| Destructor. Does nothing. | |
| const string & | getType () const |
| Get the spectrum type. More... | |
| EGS_Float | sampleEnergy (EGS_RandomGenerator *rndm) |
| Sample a particle energy. More... | |
| virtual bool | storeState (ostream &data_out) const |
| Store the state of the spectrum object into the stream data_out. More... | |
| virtual bool | setState (istream &data_in) |
| Set the state of the spectrum object from the data in the stream data_in. More... | |
| virtual bool | addState (istream &data_in) |
| Add to the state of this object the data from the stream data_in. More... | |
| virtual void | resetCounter () |
| Reset the state of this spectrum object. More... | |
| void | getSampledAverage (EGS_Float &e, EGS_Float &de) const |
| Get the average sampled energy and its statistical uncertainty. More... | |
| void | reportAverageEnergy () const |
| Report the average energy (expected and actually sampled). More... | |
Protected Member Functions | |
| EGS_Float | sample (EGS_RandomGenerator *rndm) |
Protected Attributes | |
| EGS_Float | Eo |
| The mean energy. | |
| EGS_Float | Emax |
| The maximum energy. | |
| EGS_Float | sleft |
| The width of the spectrum left of Eo. | |
| EGS_Float | sright |
| The width of the spectrum right of Eo. | |
| EGS_Float | p |
| Protected Attributes inherited from EGS_BaseSpectrum | |
| EGS_I64 | count |
| Number of times the sampleEnergy() method was called. | |
| double | sum_E |
| Sum of energies sampled so far. | |
| double | sum_E2 |
| Sum of energies squared sampled so far. | |
| string | type |
| A short string describing the spectrum that must be set by derived classes. | |
Additional Inherited Members | |
| Static Public Member Functions inherited from EGS_BaseSpectrum | |
| static EGS_BaseSpectrum * | createSpectrum (EGS_Input *inp) |
| Create and return a pointer to a spectrum object from the information pointed to by inp. More... | |
Detailed Description
A double-Gaussian spectrum.
A double-Gaussian spectrum is a spectrum that consists of two Gaussian distributions with the same mean energy 
but different widths smoothly joined together at so that for 
the probability distribution is given by the first Gaussian and for by the second. This type of spectrum has been used to describe the spectrum of electrons impinging on the bremsstrahlung target of some medical linear accelerators. It is defined via
:start spectrum:
type = Double Gaussian
mean energy = the mean kinetic energy Eo
sigma = the two sigmas of the spectrum
or
fwhm = the two fwhms of the spectrum
:stop spectrum:
Definition at line 222 of file egs_spectra.cpp.
Member Data Documentation
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protected |
The probability for picking energies from the left or right Gaussian
Definition at line 261 of file egs_spectra.cpp.
The documentation for this class was generated from the following file:
- /home/rwtownson/EGSnrc/HEN_HOUSE/egs++/egs_spectra.cpp
