G4WilsonRadius.cc

Go to the documentation of this file.

//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// *                                                                  *
// * Parts of this code which have been  developed by QinetiQ Ltd     *
// * under contract to the European Space Agency (ESA) are the        *
// * intellectual property of ESA. Rights to use, copy, modify and    *
// * redistribute this software for general public use are granted    *
// * in compliance with any licensing, distribution and development   *
// * policy adopted by the Geant4 Collaboration. This code has been   *
// * written by QinetiQ Ltd for the European Space Agency, under ESA  *
// * contract 17191/03/NL/LvH (Aurora Programme).                     *
// *                                                                  *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
//
// MODULE:              G4WilsonRadius.cc
//
// Version:             B.1
// Date:                15/04/04
// Author:              P R Truscott
// Organisation:        QinetiQ Ltd, UK
// Customer:            ESA/ESTEC, NOORDWIJK
// Contract:            17191/03/NL/LvH
//
// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
//
// CHANGE HISTORY
// --------------
//
// 6 October 2003, P R Truscott, QinetiQ Ltd, UK
// Created.
//
// 15 March 2004, P R Truscott, QinetiQ Ltd, UK
// Beta release
//
// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
//
//
#include "G4WilsonRadius.hh"
#include "G4SystemOfUnits.hh"
#include "G4Pow.hh"

//
G4WilsonRadius::G4WilsonRadius ()
{
  G4double r0 = 0.84*fermi;
  r0sq        = r0 * r0;
  factor      = std::sqrt(5.0/3.0) * fermi;
  third       = 1.0 / 3.0;
}
//
G4WilsonRadius::~G4WilsonRadius ()
{;}
//
G4double G4WilsonRadius::GetWilsonRMSRadius (G4double A)
{
  G4double radius;
  if (A > 26.0)
    radius = factor * (0.84*G4Pow::GetInstance()->A13(A) + 0.55);
  else
  {
        // this was changed from just G4double to static const G4double
        // to make sure that time wasn't being wasted on every call reloading a stack variable
        // by MHM 20050119
    static const G4double r[27] = {0.0, 0.85,  2.095, 1.976, 1.671, 1.986,
                           2.57,  2.41,  2.23,  2.519, 2.45,
                           2.42,  2.471, 2.440, 2.58,  2.611,
                           2.730, 2.662, 2.727, 2.9,   3.040,
                           2.867, 2.969, 2.94,  3.075, 3.11,
                           3.06};
    radius = factor * r[(G4int) (A+0.4)];
  }
  return radius;
}
//
G4double G4WilsonRadius::GetWilsonRadius (G4double A)
{
  G4double r  = GetWilsonRMSRadius(A);
  return  1.29*std::sqrt(r*r-r0sq);
}
//