import type { ElementSymbol } from '../element';
export type ScatteringSpecies = ElementSymbol | `D`;
export type RadiationType = `xray` | `neutron` | `electron`;
export declare const XRAY_GAUSSIAN_PREFACTOR = 41.78214;
export declare const ELECTRON_FORM_FACTOR_CONST: number;
export declare function gaussian_params(element: ScatteringSpecies): number[][];
export declare function neutron_scattering_length(element: ScatteringSpecies): number;
export declare const gaussian_turning_point: (element: ScatteringSpecies) => number;
export declare function xray_form_factor(element: ScatteringSpecies, s_val: number): number;
export declare function electron_form_factor(element: ScatteringSpecies, s_val: number): number;
export declare function scattering_length(element: ScatteringSpecies, radiation: RadiationType, s_val?: number): number;
export type PdfWeighting = {
    mean_scattering_length: number;
    scattering_lengths: Record<string, number>;
    fractions: Record<string, number>;
    pair_weight: (element_a: string, element_b: string) => number;
};
export declare function pdf_scattering_weights(composition: Record<string, number>, radiation: RadiationType, s_val?: number): PdfWeighting;