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G4InuclParamAngDst.cc
Go to the documentation of this file.
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the newest version in sPHENIX GitHub for file G4InuclParamAngDst.cc
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//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// Author: Michael Kelsey (SLAC)
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// Date: 22 April 2013
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//
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// Description: intermediate base class for INUCL parametrizations of
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// three-body angular distributions in Bertini-style cascade
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//
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// 20130308 M. Kelsey -- Move PQ,PR calculation to G4InuclSpecialFunctions.
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// 20150608 M. Kelsey -- Label all while loops as terminating.
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#include "
G4InuclParamAngDst.hh
"
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#include "
G4InuclSpecialFunctions.hh
"
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#include "
G4InuclParticleNames.hh
"
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using namespace
G4InuclSpecialFunctions;
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using namespace
G4InuclParticleNames;
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// Use coefficients in power expansion of random fraction
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G4double
G4InuclParamAngDst::GetCosTheta
(
G4int
ptype,
G4double
ekin)
const
{
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if
(verboseLevel>3) {
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G4cout
<< theName <<
"::GetCosTheta: ptype "
<< ptype <<
" ekin "
<< ekin
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<<
G4endl
;
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}
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G4int
J = (ptype==
pro
|| ptype==
neu
) ? 0 : 1;
// nucleon vs. other
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if
(verboseLevel > 3)
G4cout
<<
" J "
<< J <<
G4endl
;
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const
G4int
itry_max = 100;
// Parametrizations aren't properly bounded
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G4double
Spow = -999.;
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G4int
itry = 0;
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/* Loop checking 08.06.2015 MHK */
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while
((Spow < 0. || Spow > 1.) && itry < itry_max) {
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itry++;
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Spow =
randomInuclPowers
(ekin, coeffAB[J]);
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}
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if
(itry == itry_max) {
// No success, just throw flat distribution
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if
(verboseLevel > 2) {
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G4cout
<< theName <<
"::GetCosTheta -> itry = itry_max "
<< itry
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<<
G4endl
;
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}
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Spow =
inuclRndm
();
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}
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return
2.0*Spow - 1.0;
// Convert generated [0..1] to [-1..1]
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}
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G4InuclParamAngDst.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:40
using
1.8.2 with
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