/*-
* Copyright 2015 Diamond Light Source Ltd.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*/
package uk.ac.diamond.scisoft.xpdf;
import com.github.tschoonj.xraylib.Xraylib;
/**
* Calculates the mass attenuation for fixed I15-1 beam energies.
* @author Timothy Spain timothy.spain@diamond.ac.uk
*
*/
public final class XPDFMassAttenuation {
/**
* Private constructor
*/
private XPDFMassAttenuation() {
}
/**
* Returns the mass attenuation coefficient.
* @param energy
* energy of the attenuated photons in keV.
* @param z
* atomic number of the attenuating atoms.
* @return the mass attenuation coefficient in cm²/g
*/
public static double get(double energy, int z) {
//return (new XCOMElement(z)).getAttenuation(energy*1e-3, "total");
return Xraylib.CS_Total(z, energy);
}
/**
* Returns the photoionization mass attenuation coefficient.
* @param energy
* energy of the attenuated photons in keV.
* @param z
* atomic number of the attenuating atoms.
* @return the photoionization mass attenuation coefficient in cm²/g
*/
public static double getPhoto(double energy, int z) {
return Xraylib.CS_Photo(z, energy);
}
}