[
  {
    "group": "americium",
    "name": "hea-242",
    "forge_energy": 1536,
    "heat": 564,
    "criticality": 32,
    "depletion": 92,
    "efficiency": 140,
    "isotopes": [242, 243]
  },
  {
    "group": "americium",
    "name": "lea-242",
    "forge_energy": 384,
    "heat": 94,
    "criticality": 65,
    "depletion": 74,
    "efficiency": 135,
    "isotopes": [242, 243]
  }
]