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Co-authored-by: Your Name <you@example.com> Co-authored-by: GuySten <62616591+GuySten@users.noreply.github.com> Co-authored-by: GuySten <guyste@post.bgu.ac.il> Co-authored-by: Eliezer214 <110336440+Eliezer214@users.noreply.github.com> Co-authored-by: Paul Romano <paul.k.romano@gmail.com>
55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
//! \file secondary_nbody.h
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//! N-body phase space distribution
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#ifndef OPENMC_SECONDARY_NBODY_H
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#define OPENMC_SECONDARY_NBODY_H
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#include "hdf5.h"
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#include "openmc/angle_energy.h"
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namespace openmc {
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//==============================================================================
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//! Angle-energy distribution for particles emitted from neutron and
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//! charged-particle reactions. This corresponds to ACE law 66 and ENDF File 6,
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//! LAW=6.
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//==============================================================================
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class NBodyPhaseSpace : public AngleEnergy {
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public:
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explicit NBodyPhaseSpace(hid_t group);
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//! Sample distribution for an angle and energy
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//! \param[in] E_in Incoming energy in [eV]
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//! \param[out] E_out Outgoing energy in [eV]
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//! \param[out] mu Outgoing cosine with respect to current direction
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//! \param[inout] seed Pseudorandom seed pointer
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void sample(
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double E_in, double& E_out, double& mu, uint64_t* seed) const override;
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//! Sample an outgoing energy from the N-body phase space distribution
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//! \param[in] E_in Incoming energy in [eV]
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//! \param[inout] seed Pseudorandom seed pointer
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//! \return Sampled outgoing energy in [eV]
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double sample_energy(double E_in, uint64_t* seed) const;
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//! Sample an outgoing energy and evaluate the angular PDF
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//! \param[in] E_in Incoming energy in [eV]
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//! \param[in] mu Scattering cosine with respect to current direction
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//! \param[out] E_out Outgoing energy in [eV]
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//! \param[inout] seed Pseudorandom seed pointer
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//! \return Probability density for the scattering cosine
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double sample_energy_and_pdf(
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double E_in, double mu, double& E_out, uint64_t* seed) const override;
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private:
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int n_bodies_; //!< Number of particles distributed
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double mass_ratio_; //!< Total mass of particles [neutron mass]
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double A_; //!< Atomic weight ratio
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double Q_; //!< Reaction Q-value [eV]
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};
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} // namespace openmc
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#endif // OPENMC_SECONDARY_NBODY_H
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