Abstract base class for ExitChannel objects that lead to the unbound continuum in the final state. More...

#include <ExitChannel.hh>

Inheritance diagram for marley::ContinuumExitChannel:

Classes
struct	SpinParityWidth
	A spin-parity value with its corresponding partial decay width. More...

Public Member Functions
	ContinuumExitChannel (double Ec_min, int lmax)

virtual void	compute_total_width () final override

virtual double	differential_width (double Exf, bool store_jpi_widths=false) const =0

virtual void	do_decay (double &Ex, int &two_J, marley::Parity &Pi, const marley::Particle &compound_nucleus, marley::Particle &emitted_particle, marley::Particle &residual_nucleus, marley::Generator &gen) const final override
	Simulates a nuclear decay into this channel. More...

virtual double	E_c_max () const =0
	Returns the maximum accessible excitation energy to be used when integrating over the continuum.

double	E_c_min () const
	Returns the minimum excitation energy bound for the continuum.

virtual bool	is_continuum () const final override
	Returns true if this channel accesses the particle-unbound continuum of nuclear levels or false otherwise.

double	sample_Exf (marley::Generator &gen) const

void	sample_spin_parity (double Exf, int &two_Jf, marley::Parity &Pf, marley::Generator &gen) const

void	set_skip_jpi_sampling (bool skip_it) const
	Sets the flag that will skip sampling of a final-state nuclear spin-parity value in do_decay() More...

Public Member Functions inherited from marley::ExitChannel
	ExitChannel ()=default

	ExitChannel (int pdgi, int qi, double Exi, int twoJi, marley::Parity Pi, double rho_i, marley::StructureDatabase &sdb)

virtual bool	emits_fragment () const =0
	Returns true if this channel involves fragment emission or false if it involves gamma-ray emission.

virtual int	emitted_particle_pdg () const =0
	Returns the PDG code for the particle (gamma-ray or nuclear fragment) emitted by decays into this ExitChannel.

virtual int	final_nucleus_pdg () const =0
	Returns the PDG code for the final nucleus.

double	width () const
	Get the total decay width into this channel (MeV)

Protected Attributes
double	E_c_min_
	Minimum accessible nuclear excitation energy (MeV) in the continuum.

std::unique_ptr< marley::ChebyshevInterpolatingFunction >	Exf_cdf_
	Chebyshev polynomial interpolant to the cumulative density function for the final-state nuclear excitation energy. More...

std::vector< SpinParityWidth >	jpi_widths_table_
	Table of possible final-state spin-parities together with their partial differential decay widths.

int	l_max_

bool	skip_jpi_sampling_ = false
	Flag that allows skipping the sampling of a final nuclear spin-parity (useful only for testing purposes)

Protected Attributes inherited from marley::ExitChannel
double	Exi_
	Initial nuclear excitation energy \( E_x \) (MeV)

double	one_over_two_pi_rho_i_

int	pdgi_
	PDG code for the initial nucleus.

marley::Parity	Pi_
	Initial nuclear parity \( \Pi \).

int	qi_

marley::StructureDatabase *	sdb_
	StructureDatabase to use in calculations.

int	twoJi_
	Two times the initial nuclear spin \( J \).

double	width_
	Total decay width into this channel (MeV)

Additional Inherited Members
Static Public Member Functions inherited from marley::ExitChannel
template<typename It >
static marley::IteratorToPointerMember< It, double >	make_width_iterator (It it)
	Convert an iterator that points to an ExitChannel object into an iterator to the ExitChannel's width_ member variable. More...

Protected Member Functions inherited from marley::ExitChannel
virtual void	prepare_products (const marley::Particle &compound_nucleus, marley::Particle &emitted_particle, marley::Particle &residual_nucleus, double Exf, marley::Generator &gen) const
	Helper function that prepares Particle objects representing the products of the two-body decay. More...

Detailed Description

Abstract base class for ExitChannel objects that lead to the unbound continuum in the final state.

Constructor & Destructor Documentation

◆ ContinuumExitChannel()

marley::ContinuumExitChannel::ContinuumExitChannel	(	double	Ec_min,
		int	lmax
	)

inline

Parameters

Ec_min	Minimum accessible nuclear excitation energy in the continuum. Below this value, only discrete nuclear levels are assumed to be present.
lmax	The maximum value of the orbital angular momentum (multipolarity) \( \ell \) to consider when computing differential decay widths for fragment (gamma-ray) emission to the continuum

Member Function Documentation

◆ compute_total_width()

void marley::ContinuumExitChannel::compute_total_width ( )

finaloverridevirtual

Helper function that initializes the width_ member variable upon construction

Implements marley::ExitChannel.

◆ do_decay()

void marley::ContinuumExitChannel::do_decay	(	double &	Exf,
		int &	two_Jf,
		marley::Parity &	Pf,
		const marley::Particle &	compound_nucleus,
		marley::Particle &	emitted_particle,
		marley::Particle &	residual_nucleus,
		marley::Generator &	gen
	)		const

finaloverridevirtual

Simulates a nuclear decay into this channel.

Parameters

[out]	Exf	The final nuclear excitation energy
[out]	two_Jf	Two times the final nuclear spin
[out]	Pf	The final nuclear parity
[in]	compound_nucleus	Particle object representing the initial nucleus
[out]	emitted_particle	Particle emitted in the de-excitation
[out]	residual_nucleus	Final-state nucleus after particle emission
	gen	Generator to use for random sampling

Implements marley::ExitChannel.

◆ set_skip_jpi_sampling()

void marley::ContinuumExitChannel::set_skip_jpi_sampling ( bool skip_it ) const

inline

Sets the flag that will skip sampling of a final-state nuclear spin-parity value in do_decay()

The skipping functionality should only be used for testing purposes!

Member Data Documentation

◆ Exf_cdf_

std::unique_ptr<marley::ChebyshevInterpolatingFunction> marley::ContinuumExitChannel::Exf_cdf_

mutableprotected

Chebyshev polynomial interpolant to the cumulative density function for the final-state nuclear excitation energy.

This pointer will be initialized lazily during the first call to do_decay()

◆ l_max_

int marley::ContinuumExitChannel::l_max_

protected

Maximum orbital angular momentum (multipolarity) to consider when computing differential fragment (gamma-ray) decay widths

The documentation for this class was generated from the following files:

/Users/gardiner/marley/include/marley/ExitChannel.hh
/Users/gardiner/marley/src/ExitChannel.cc

Classes

Public Member Functions

Protected Attributes

Additional Inherited Members