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- /* specfunc/gsl_sf_coulomb.h
- *
- * Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 3 of the License, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
- /* Author: G. Jungman */
- #ifndef __GSL_SF_COULOMB_H__
- #define __GSL_SF_COULOMB_H__
- #include "gsl_mode.h"
- #include "gsl_sf_result.h"
- #undef __BEGIN_DECLS
- #undef __END_DECLS
- #ifdef __cplusplus
- # define __BEGIN_DECLS extern "C" {
- # define __END_DECLS }
- #else
- # define __BEGIN_DECLS /* empty */
- # define __END_DECLS /* empty */
- #endif
- __BEGIN_DECLS
- /* Normalized hydrogenic bound states, radial dependence. */
- /* R_1 := 2Z sqrt(Z) exp(-Z r)
- */
- int gsl_sf_hydrogenicR_1_e(const double Z, const double r, gsl_sf_result * result);
- double gsl_sf_hydrogenicR_1(const double Z, const double r);
- /* R_n := norm exp(-Z r/n) (2Z/n)^l Laguerre[n-l-1, 2l+1, 2Z/n r]
- *
- * normalization such that psi(n,l,r) = R_n Y_{lm}
- */
- int gsl_sf_hydrogenicR_e(const int n, const int l, const double Z, const double r, gsl_sf_result * result);
- double gsl_sf_hydrogenicR(const int n, const int l, const double Z, const double r);
- /* Coulomb wave functions F_{lam_F}(eta,x), G_{lam_G}(eta,x)
- * and their derivatives; lam_G := lam_F - k_lam_G
- *
- * lam_F, lam_G > -0.5
- * x > 0.0
- *
- * Conventions of Abramowitz+Stegun.
- *
- * Because there can be a large dynamic range of values,
- * overflows are handled gracefully. If an overflow occurs,
- * GSL_EOVRFLW is signalled and exponent(s) are returned
- * through exp_F, exp_G. These are such that
- *
- * F_L(eta,x) = fc[k_L] * exp(exp_F)
- * G_L(eta,x) = gc[k_L] * exp(exp_G)
- * F_L'(eta,x) = fcp[k_L] * exp(exp_F)
- * G_L'(eta,x) = gcp[k_L] * exp(exp_G)
- */
- int
- gsl_sf_coulomb_wave_FG_e(const double eta, const double x,
- const double lam_F,
- const int k_lam_G,
- gsl_sf_result * F, gsl_sf_result * Fp,
- gsl_sf_result * G, gsl_sf_result * Gp,
- double * exp_F, double * exp_G);
- /* F_L(eta,x) as array */
- int gsl_sf_coulomb_wave_F_array(
- double lam_min, int kmax,
- double eta, double x,
- double * fc_array,
- double * F_exponent
- );
- /* F_L(eta,x), G_L(eta,x) as arrays */
- int gsl_sf_coulomb_wave_FG_array(double lam_min, int kmax,
- double eta, double x,
- double * fc_array, double * gc_array,
- double * F_exponent,
- double * G_exponent
- );
- /* F_L(eta,x), G_L(eta,x), F'_L(eta,x), G'_L(eta,x) as arrays */
- int gsl_sf_coulomb_wave_FGp_array(double lam_min, int kmax,
- double eta, double x,
- double * fc_array, double * fcp_array,
- double * gc_array, double * gcp_array,
- double * F_exponent,
- double * G_exponent
- );
- /* Coulomb wave function divided by the argument,
- * F(eta, x)/x. This is the function which reduces to
- * spherical Bessel functions in the limit eta->0.
- */
- int gsl_sf_coulomb_wave_sphF_array(double lam_min, int kmax,
- double eta, double x,
- double * fc_array,
- double * F_exponent
- );
- /* Coulomb wave function normalization constant.
- * [Abramowitz+Stegun 14.1.8, 14.1.9]
- */
- int gsl_sf_coulomb_CL_e(double L, double eta, gsl_sf_result * result);
- int gsl_sf_coulomb_CL_array(double Lmin, int kmax, double eta, double * cl);
- __END_DECLS
- #endif /* __GSL_SF_COULOMB_H__ */
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