Class ElectronPairProduction

Defined in File ElectronPairProduction.h

Inheritance Relationships

Base Type

public Module (Class Module)

Class Documentation

class ElectronPairProduction : public Module 

Electron-pair production of charged nuclei with background photons.

This module simulates electron-pair production as a continuous energy loss.

Several photon fields can be selected.

The production of secondary e+/e- pairs and photons can by activated.

By default, the module limits the step size to 10% of the energy loss length of the particle.

Public Functions

ElectronPairProduction(ref_ptr<PhotonField> photonField, bool haveElectrons = false, double limit = 0.1)

Constructor for the Electron Pair Production.

Parameters:

photonField – target photon field
haveElectrons – If true, secondary electrons will be added to the simulation
limit – step size limit as fraction of mean free path

void setPhotonField(ref_ptr<PhotonField> photonField)

void setHaveElectrons(bool haveElectrons)

void setLimit(double limit)

Limit the propagation step to a fraction of the mean free path

Parameters:: limit – fraction of the mean free path

void setInteractionTag(std::string tag)

set a custom interaction tag to trace back this interaction

Parameters:: tag – string that will be added to the candidate and output

std::string getInteractionTag() const

void initRate(std::string filename)

void initSpectrum(std::string filename)

virtual void process(Candidate *candidate) const

double lossLength(int id, double lf, double z = 0) const

Calculates the energy loss length 1/beta = -E dx/dE in [m]

The energy loss length is tabulated for protons against

CMB and IRB. Modification for nuclei and cosmological evolution of the photon background is considered with (cf. 10.1016/j.astropartphys.2012.07.010, eq. 3 and 5) beta_A,Z(E) = Z^2 / A * beta_p(E/A) beta(E,z) = (1+z)^3 beta((1+z)E).

Parameters:

id – PDG particle ID
lf – Lorentz factor
z – redshift

virtual std::string getDescription() const

void setDescription(const std::string &description)

inline void process(ref_ptr<Candidate> candidate) const

inline size_t addReference() const

inline size_t removeReference() const

inline int removeReferenceNoDelete() const

inline size_t getReferenceCount() const

Protected Attributes

mutable size_t _referenceCount