DistortedWave Class Reference

Distorted wave information. More...

#include <wave_distort.h>

Inheritance diagram for DistortedWave:

Collaboration diagram for DistortedWave:

Public Member Functions
	~DistortedWave ()
DistortedWave	operator= (DistortedWave const &W)
double	operator() (double x) const
Complex	getPhasef () const
double	getPhase () const
double	k () const
	Wavenumber. More...
int	l () const
	Angular momentum. More...
double	getTurningPoint () const
	Classical turning point. More...
std::pair< double, int >	getZeroAsymptotic (double x) const
	Near-zero asymptotic behaviour. More...
void	toFile (const char *filename) const
	Export data to file using write_array. More...
double	farRadius () const
size_t	sampleCount () const
	DistortedWave (double _kn, int _ln, DistortingPotential const &_U)
	DistortedWave (DistortedWave const &W)

Data Fields
unsigned	Evaluations
	(debuging parameter) number of evaluations More...

Detailed Description

The distorted wave \( \phi_{l_n}(k_n, r) \) is a solution of the equation

\[ \left(-\frac{\mathrm{d}^2}{\mathrm{d}r^2} + \frac{l_n(l_n+1)}{r^2} + 2U_n(r) \right) \phi_{l_n} (k_n, r) = k_n^2 \phi_{l_n} (k_n, r) \]

which is regular at origin and which satisfies the boundary condition

\[ \phi_{l_n} (k_n, r) \propto \hat{j}_{l_n}(k_n r) + t_{l_n}(k_n) \mathrm{i}\hat{h}_{l_n}^{(+)}(k_n r) \ . \]

Most of the work is being done in the constructor. The radial interval between the origin and the far radius of DistortingPotential is divided into an equidistant grid (with spacing adjusted to the energy of projectile), on which the solution is sought. Integration starts from \( r = h \), where \( h \) is a small number compared to grid size. The initial conditions here are chosen as

\[ \phi_{l_n}(k_n, h) \simeq h \cdot 10^{-5} \ , \]

\[ \phi_{l_n}'(k_n, h) \simeq (l_n + 1) \cdot 10^{-5} \ , \]

which is in accord with the behaviour of Ricatti-Bessel functions near origin. Resulting solution is real and using the standard formula

\[ \tan \delta_{l_n} = \frac{k_n \cos(k_n R - l_n\pi/2) - D \sin(k_n R - l_n\pi/2)} {k_n \sin(k_n R - l_n\pi/2) + D \cos(k_n R - l_n\pi/2)} \]

the phase shift is determined. This number sets the phase factor \( \mathrm{e}^{\mathrm{i}\delta_{l_n}} \) of the whole wave.

Constructor & Destructor Documentation

DistortedWave::DistortedWave	(	double	_kn,
		int	_ln,
		DistortingPotential const &	_U
	)

DistortedWave::DistortedWave ( DistortedWave const &  W )

inline

DistortedWave::~DistortedWave

(

)

Member Function Documentation

double DistortedWave::farRadius ( ) const

inline

Return radius from which the asymptotic form is used.

double DistortedWave::getPhase ( ) const

inline

Return the phase \( \delta_{l_n} \).

Complex DistortedWave::getPhasef ( ) const

inline

Return the phase factor \( \mathrm{e}^{\mathrm{i}\delta_{l_n}} \).

double DistortedWave::getTurningPoint ( ) const

inline

std::pair< double, int > DistortedWave::getZeroAsymptotic

(

double

x

)

const

double DistortedWave::k ( ) const

inline

int DistortedWave::l ( ) const

inline

double DistortedWave::operator() ( double  x ) const

virtual

Evaluate distorted wave.

Implements RadialFunction< double >.

DistortedWave DistortedWave::operator=

(

DistortedWave const &

W

)

size_t DistortedWave::sampleCount ( ) const

inline

void DistortedWave::toFile ( const char *  filename ) const

inline

Field Documentation

unsigned DistortedWave::Evaluations

mutable

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

• src/wave_distort.h
• src/wave_distort.cpp