#include <JETSCAPE/blob/main/external_packages/trento/src/nucleus.h>

Inheritance diagram for trento::DeformedWoodsSaxonNucleus:

Collaboration diagram for trento::DeformedWoodsSaxonNucleus:

Public Member Functions
	DeformedWoodsSaxonNucleus (std::size_t A, double R, double a, double beta2, double beta4, double dmin=0)

virtual double	radius () const override

Private Member Functions
virtual void	sample_nucleons_impl () override
	Sample deformed Woods-Saxon nucleon positions.

double	deformed_woods_saxon_dist (double r, double cos_theta) const
	Evaluate the deformed Woods-Saxon distribution.

Private Attributes
const double	R_
	Woods-Saxon parameters.

const double	a_

const double	beta2_

const double	beta4_

const double	rmax_
	Maximum radius.

Additional Inherited Members
Public Types inherited from trento::Nucleus
using	size_type = std::vector< Nucleon >::size_type

using	iterator = std::vector< Nucleon >::iterator

using	const_iterator = std::vector< Nucleon >::const_iterator

Static Public Member Functions inherited from trento::Nucleus
static NucleusPtr	create (const std::string &species, double nucleon_width, double nucleon_dmin=0)

Protected Member Functions inherited from trento::MinDistNucleus
	MinDistNucleus (std::size_t A, double dmin=0)

bool	is_too_close (const_iterator nucleon) const

Detailed Description

Samples nucleons from a deformed spheroidal Woods-Saxon distribution

.. math::

f(r, ) {1}{1 + ({r-R(1+{20}+{40})}{a})}.

For deformed heavy nuclei such as uranium.

Definition at line 244 of file nucleus.h.

View newest version in sPHENIX GitHub at line 244 of file nucleus.h

Constructor & Destructor Documentation

trento::DeformedWoodsSaxonNucleus::DeformedWoodsSaxonNucleus	(	std::size_t	A,
		double	R,
		double	a,
		double	beta2,
		double	beta4,
		double	dmin = `0`
	)

Nucleus::create() sets these parameters for a given species.

Parameters

A	number of nucleons
R	Woods-Saxon radius
a	Woods-Saxon surface thickness
beta2	Woods-Saxon deformation parameter
beta4	Woods-Saxon deformation parameter
dmin	minimum nucleon-nucleon distance (optional, default zero)

Member Function Documentation

double trento::DeformedWoodsSaxonNucleus::deformed_woods_saxon_dist	(	double	r,
		double	cos_theta
	)		const

private

Evaluate the deformed Woods-Saxon distribution.

Definition at line 272 of file nucleus.cxx.

View newest version in sPHENIX GitHub at line 272 of file nucleus.cxx

References a_, beta2_, beta4_, trento::random::cos_theta(), and R_.

Referenced by sample_nucleons_impl().

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double trento::DeformedWoodsSaxonNucleus::radius ( ) const

overridevirtual

The radius of a deformed Woods-Saxon Nucleus is computed from the parameters (R, a, beta2, beta4).

Return something a bit smaller than the true maximum radius. The Woods-Saxon distribution falls off very rapidly (exponentially), and since this radius determines the impact parameter range, the true maximum radius would cause far too many events with zero participants.

Implements trento::Nucleus.

Definition at line 268 of file nucleus.cxx.

View newest version in sPHENIX GitHub at line 268 of file nucleus.cxx

References a_, and rmax_.

void trento::DeformedWoodsSaxonNucleus::sample_nucleons_impl ( )

overrideprivatevirtual

Sample deformed Woods-Saxon nucleon positions.

Implements trento::Nucleus.

Definition at line 289 of file nucleus.cxx.

View newest version in sPHENIX GitHub at line 289 of file nucleus.cxx

References KFPMath::a, KFPMath::b, trento::Nucleus::begin(), trento::random::cos_theta(), deformed_woods_saxon_dist(), trento::Nucleus::end(), trento::MinDistNucleus::is_too_close(), ActsTests::PropagationDatasets::phi, physmon_track_finding_ttbar::r, rmax_, trento::Nucleus::set_nucleon_position(), trento::Nucleus::size(), Acts::Experimental::detail::BlueprintHelper::sort(), ambiguity_solver_full_chain::x, y, and physmon_track_finding_ttbar::z.