[
  {
    "group": "berkelium",
    "name": "heb-248",
    "forge_energy": 43200,
    "heat": 312,
    "criticality": 32,
    "depletion": 92,
    "efficiency": 170,
    "isotopes": [248, 247]
  },
  {
    "group": "berkelium",
    "name": "leb-248",
    "forge_energy": 10800,
    "heat": 52,
    "criticality": 73,
    "depletion": 108,
    "efficiency": 165,
    "isotopes": [248, 247]
  }
]