{
  "runtime": {
    "python": "3.12.10 (tags/v3.12.10:0cc8128, Apr  8 2025, 12:21:36) [MSC v.1943 64 bit (AMD64)]",
    "numpy": "2.5.3",
    "matplotlib": "3.11.2"
  },
  "generator_sha256": "e16be58ba272f279224d6bf75219760d294d21f39480342debd29776be065f6d",
  "density_g_cm3": 2.7,
  "nucleons_per_gram": 6.02214076e+23,
  "cross_section_cm2_per_nucleon": 1.1e-38,
  "cross_section_reported_uncertainty_not_propagated": 1.5e-39,
  "scope": "Nominal iron charged-current cross section at about1.1GeV transferred approximately to generic rock; not material-specific prediction",
  "assumptions": [
    "Constant cross section",
    "Independent ideal Poisson counts",
    "No background dead time or correlation",
    "No heating or operational source model"
  ]
}