Comparison Results

NeoMC comparisons answer bounded physical questions. Each result below names the measured observable, model domain and remaining limitation.

Current Same-Observable Evidence

Capability	Reference observable	Current result	What it supports
Cu electron K-shell ionization	measured microscopic sigma*K, 9.63-89.9 keV	all 17 points within 1.78 combined standard uncertainties	EEDL-bound K-vacancy response through the public electron runtime
Fe K-shell x-ray production	Kalpha and Kbeta production cross sections at 59.54 keV	NeoMC is 3.11% and 3.08% below experiment; Kbeta/Kalpha differs by 0.033%	transported photoionization plus relaxation-line expectation
O-16 photoneutron production	absolute O-16(gamma,n) cross section, 15.97-20.14 MeV	maximum residual 1.155 reported experimental uncertainties; RMS normalized residual 0.573	multi-reaction photonuclear competition and mixed product handoff
35 keV positron backscatter in Al	returned positron current above 50 eV	0.1282 +/- 0.00473 versus approximately 0.136; C/E 0.943	coupled positron material transport for this target and energy
light-water microscopic angular scattering	absolute d sigma/d Omega per H2O molecule, 0.0063-2.2 eV	median C/E 0.983; geometric RMS factor 1.109 over 1044 points	combined bound-H and free-O evaluated response at 293.6 K
TIARA 43 MeV Fe transmission	BC501A volume-average fluence behind 10 cm Fe	C/E 0.978 for 20-38 MeV and 0.957 for 38-44 MeV	high-energy neutron transport in the declared JENDL-5 iron case

These rows do not establish arbitrary-material or arbitrary-energy transport. The detailed status table records the exact scope and report.

Verification And Diagnostic Comparisons

NeoMC also compares processing and model components with:

• NIST ESTAR, PSTAR and ASTAR stopping/range tables;
• NJOY or trusted processed nuclear data;
• OpenMC for matched neutron transport diagnostics;
• Geant4 for selected EM comparison cases;
• analytic attenuation, kinematics and statistical invariants.

These checks are valuable for locating defects. They are not substituted for a same-observable experiment.

Reproduce A Repository Consumer

Build the public benchmark consumers:

cmake -S . -B build \
  -DNEOMC_BUILD_IMPORTERS=ON \
  -DNEOMC_BUILD_BENCHMARKS=ON
cmake --build build --parallel

Current legacy consumer targets are:

• neomc_decay_source_term;
• neomc_decay_inventory_chain;
• neomc_radioisotope_gamma_shielding;
• neomc_positron_annihilation;
• neomc_electron_range_dose;
• neomc_proton_csda_range;
• neomc_alpha_csda_range;
• neomc_photonuclear_xs.

Newer capability evidence programs are built with NEOMC_BUILD_DATA_TOOLS=ON and have data-specific commands in their retained reports.

How To Read A Comparison

Check five things before reusing a number:

1. Is the reference experimental, an evaluated table, another code or an analytic result?
2. Are the calculated and reference observables identical?
3. Are source, geometry, material and data version stated?
4. Does the comparison carry Monte Carlo and experimental uncertainty with their different meanings?
5. Is the conclusion limited to the processes exercised by that observable?