23034959969

Committed 13 Mar 2026 03:32AM UTC coverage: 81.385% (-0.2%) from 81.564%

Build # 23034959969

Build Type

Pull #3550

github

Committed by

web-flow

Commit Message

Merge 85f0fcdee into 4bda85f17

Pull Request Pull Request #3550: [Point Detector] Add distribution get_pdf functionality

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83.33

/src/reaction_product.cpp

#include "openmc/reaction_product.h"

#include <cassert>
#include <string> // for string

#include <fmt/core.h>

#include "openmc/endf.h"
#include "openmc/error.h"
#include "openmc/hdf5_interface.h"
#include "openmc/memory.h"
#include "openmc/particle.h"
#include "openmc/random_lcg.h"
#include "openmc/secondary_correlated.h"
#include "openmc/secondary_kalbach.h"
#include "openmc/secondary_nbody.h"
#include "openmc/secondary_uncorrelated.h"

namespace openmc {

//==============================================================================
// ReactionProduct implementation
//==============================================================================

ReactionProduct::ReactionProduct(hid_t group)
{
  // Read particle type
  std::string temp;
  read_attribute(group, "particle", temp);
  particle_ = ParticleType {temp};

  // Read emission mode and decay rate
  read_attribute(group, "emission_mode", temp);
  if (temp == "prompt") {
    emission_mode_ = EmissionMode::prompt;
  } else if (temp == "delayed") {
    emission_mode_ = EmissionMode::delayed;
  } else if (temp == "total") {
    emission_mode_ = EmissionMode::total;
  }

  // Read decay rate for delayed emission
  if (emission_mode_ == EmissionMode::delayed) {
    if (attribute_exists(group, "decay_rate")) {
      read_attribute(group, "decay_rate", decay_rate_);
    } else if (particle_.is_neutron()) {
      warning(fmt::format("Decay rate doesn't exist for delayed neutron "
                          "emission ({}).",
        object_name(group)));
    }
  }

  // Read secondary particle yield
  yield_ = read_function(group, "yield");

  int n;
  read_attribute(group, "n_distribution", n);

  for (int i = 0; i < n; ++i) {
    std::string s {"distribution_"};
    s.append(std::to_string(i));
    hid_t dgroup = open_group(group, s.c_str());

    // Read applicability
    if (n > 1) {
      hid_t app = open_dataset(dgroup, "applicability");
      applicability_.emplace_back(app);
      close_dataset(app);
    }

    // Determine distribution type and read data
    read_attribute(dgroup, "type", temp);
    if (temp == "uncorrelated") {
      distribution_.push_back(make_unique<UncorrelatedAngleEnergy>(dgroup));
    } else if (temp == "correlated") {
      distribution_.push_back(make_unique<CorrelatedAngleEnergy>(dgroup));
    } else if (temp == "nbody") {
      distribution_.push_back(make_unique<NBodyPhaseSpace>(dgroup));
    } else if (temp == "kalbach-mann") {
      distribution_.push_back(make_unique<KalbachMann>(dgroup));
    }

    close_group(dgroup);
  }
}

ReactionProduct::ReactionProduct(const ChainNuclide::Product& product)
{
  particle_ = ParticleType::photon();
  emission_mode_ = EmissionMode::delayed;

  // Get chain nuclide object for radionuclide
  parent_nuclide_ = data::chain_nuclide_map.at(product.name);
  const auto& chain_nuc = data::chain_nuclides[parent_nuclide_].get();

  // Determine decay constant in [s^-1]
  decay_rate_ = chain_nuc->decay_constant();

  // Determine number of photons per decay and set yield
  double photon_per_sec = chain_nuc->photon_energy()->integral();
  double photon_per_decay = photon_per_sec / decay_rate_;
  vector<double> coef = {product.branching_ratio * photon_per_decay};
  yield_ = make_unique<Polynomial>(coef);

  // Set decay photon angle-energy distribution
  distribution_.push_back(
    make_unique<DecayPhotonAngleEnergy>(chain_nuc->photon_energy()));
}

AngleEnergy& ReactionProduct::sample_dist(double E_in, uint64_t* seed) const
{
  assert(!distribution_.empty());

  auto n = applicability_.size();
  if (n > 1) {
    double prob = 0.0;
    double c = prn(seed);
    for (int i = 0; i < n; ++i) {
      // Determine probability that i-th energy distribution is sampled
      prob += applicability_[i](E_in);

      // If i-th distribution is sampled, sample energy from the distribution
      if (c <= prob)
        return *distribution_[i];
    }
  }

  return *distribution_.back();
}

void ReactionProduct::sample(
  double E_in, double& E_out, double& mu, uint64_t* seed) const
{
  sample_dist(E_in, seed).sample(E_in, E_out, mu, seed);
}

double ReactionProduct::sample_energy_and_pdf(
  double E_in, double mu, double& E_out, uint64_t* seed) const
{
  return sample_dist(E_in, seed).sample_energy_and_pdf(E_in, mu, E_out, seed);
}

} // namespace openmc

1	#include "openmc/reaction_product.h"
2
3	#include <cassert>
4	#include <string> // for string
5
6	#include <fmt/core.h>
7
8	#include "openmc/endf.h"
9	#include "openmc/error.h"
10	#include "openmc/hdf5_interface.h"
11	#include "openmc/memory.h"
12	#include "openmc/particle.h"
13	#include "openmc/random_lcg.h"
14	#include "openmc/secondary_correlated.h"
15	#include "openmc/secondary_kalbach.h"
16	#include "openmc/secondary_nbody.h"
17	#include "openmc/secondary_uncorrelated.h"
18
19	namespace openmc {
20
21	//==============================================================================
22	// ReactionProduct implementation
23	//==============================================================================
24
25	ReactionProduct::ReactionProduct(hid_t group)	3,362,126✔
26	{
27	// Read particle type
28	std::string temp;	3,362,126✔
29	read_attribute(group, "particle", temp);	3,362,126✔
30	particle_ = ParticleType {temp};	3,362,126✔
31
32	// Read emission mode and decay rate
33	read_attribute(group, "emission_mode", temp);	3,362,126✔
34	if (temp == "prompt") {	3,362,126✔
35	emission_mode_ = EmissionMode::prompt;	3,280,352✔
36	} else if (temp == "delayed") {	81,774!
37	emission_mode_ = EmissionMode::delayed;	81,774✔
38	} else if (temp == "total") {	×
39	emission_mode_ = EmissionMode::total;	×
40	}
41
42	// Read decay rate for delayed emission
43	if (emission_mode_ == EmissionMode::delayed) {	3,362,126✔
44	if (attribute_exists(group, "decay_rate")) {	81,774!
45	read_attribute(group, "decay_rate", decay_rate_);	81,774✔
46	} else if (particle_.is_neutron()) {	×
47	warning(fmt::format("Decay rate doesn't exist for delayed neutron "	×
48	"emission ({}).",
49	object_name(group)));	×
50	}
51	}
52
53	// Read secondary particle yield
54	yield_ = read_function(group, "yield");	3,362,126✔
55
56	int n;	3,362,126✔
57	read_attribute(group, "n_distribution", n);	3,362,126✔
58
59	for (int i = 0; i < n; ++i) {	6,725,174✔
60	std::string s {"distribution_"};	3,363,048✔
61	s.append(std::to_string(i));	6,726,096✔
62	hid_t dgroup = open_group(group, s.c_str());	3,363,048✔
63
64	// Read applicability
65	if (n > 1) {	3,363,048✔
66	hid_t app = open_dataset(dgroup, "applicability");	1,754✔
67	applicability_.emplace_back(app);	1,754✔
68	close_dataset(app);	1,754✔
69	}
70
71	// Determine distribution type and read data
72	read_attribute(dgroup, "type", temp);	3,363,048✔
73	if (temp == "uncorrelated") {	3,363,048✔
74	distribution_.push_back(make_unique<UncorrelatedAngleEnergy>(dgroup));	3,243,974✔
75	} else if (temp == "correlated") {	119,074✔
76	distribution_.push_back(make_unique<CorrelatedAngleEnergy>(dgroup));	49,422✔
77	} else if (temp == "nbody") {	69,652✔
78	distribution_.push_back(make_unique<NBodyPhaseSpace>(dgroup));	732✔
79	} else if (temp == "kalbach-mann") {	68,920!
80	distribution_.push_back(make_unique<KalbachMann>(dgroup));	68,920✔
81	}
82
83	close_group(dgroup);	3,363,048✔
84	}	3,363,048✔
85	}	3,362,126✔
86
87	ReactionProduct::ReactionProduct(const ChainNuclide::Product& product)	132✔
88	{
89	particle_ = ParticleType::photon();	132✔
90	emission_mode_ = EmissionMode::delayed;	132✔
91
92	// Get chain nuclide object for radionuclide
93	parent_nuclide_ = data::chain_nuclide_map.at(product.name);	132✔
94	const auto& chain_nuc = data::chain_nuclides[parent_nuclide_].get();	132✔
95
96	// Determine decay constant in [s^-1]
97	decay_rate_ = chain_nuc->decay_constant();	132✔
98
99	// Determine number of photons per decay and set yield
100	double photon_per_sec = chain_nuc->photon_energy()->integral();	132✔
101	double photon_per_decay = photon_per_sec / decay_rate_;	132✔
102	vector<double> coef = {product.branching_ratio * photon_per_decay};	132✔
103	yield_ = make_unique<Polynomial>(coef);	132✔
104
105	// Set decay photon angle-energy distribution
106	distribution_.push_back(	132✔
107	make_unique<DecayPhotonAngleEnergy>(chain_nuc->photon_energy()));	264✔
108	}	132✔
109
110	AngleEnergy& ReactionProduct::sample_dist(double E_in, uint64_t* seed) const	50,794,898✔
111	{
112	assert(!distribution_.empty());	50,794,898!
113
114	auto n = applicability_.size();	50,794,898✔
115	if (n > 1) {	50,794,898✔
116	double prob = 0.0;	1,221✔
117	double c = prn(seed);	1,221✔
118	for (int i = 0; i < n; ++i) {	2,090!
119	// Determine probability that i-th energy distribution is sampled
120	prob += applicability_[i](E_in);	2,090✔
121
122	// If i-th distribution is sampled, sample energy from the distribution
123	if (c <= prob)	2,090✔
124	return *distribution_[i];	1,221✔
125	}
126	}
127
128	return *distribution_.back();	50,793,677✔
129	}
130
131	void ReactionProduct::sample(	50,794,898✔
132	double E_in, double& E_out, double& mu, uint64_t* seed) const
133	{
134	sample_dist(E_in, seed).sample(E_in, E_out, mu, seed);	50,794,898✔
135	}	50,794,898✔
136
NEW 137	double ReactionProduct::sample_energy_and_pdf(	×
138	double E_in, double mu, double& E_out, uint64_t* seed) const
139	{
NEW 140	return sample_dist(E_in, seed).sample_energy_and_pdf(E_in, mu, E_out, seed);	×
141	}
142
143	} // namespace openmc

openmc-dev / openmc / 23034959969

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