exposure (x and gamma rays)

{
  "id": "NISTq75",
  "unitsml_id": "q:exposure_x_and_gamma_rays",
  "name": "exposure (x and gamma rays)",
  "names": [
    {
      "value": "exposure (x and gamma rays)",
      "lang": "en"
    }
  ],
  "short": "exposure_x_and_gamma_rays",
  "type": "derived",
  "dimension": {
    "id": "NISTd49",
    "name": "exposure",
    "expression": "M-1·T·I",
    "components": [
      {
        "key": "mass",
        "symbol": "M",
        "power": -1
      },
      {
        "key": "time",
        "symbol": "T",
        "power": 1
      },
      {
        "key": "electric_current",
        "symbol": "I",
        "power": 1
      }
    ],
    "dimensionless": false
  },
  "units": [
    {
      "id": "NISTu118",
      "name": "roentgen",
      "symbol": "R"
    },
    {
      "id": "NISTu15.u27p10'3e-1/1",
      "name": "coulomb per kilogram",
      "symbol": "C/kg"
    }
  ],
  "unit_count": 2,
  "identifiers": [
    {
      "type": "nist",
      "id": "NISTq75"
    },
    {
      "type": "unitsml",
      "id": "q:exposure_x_and_gamma_rays"
    }
  ],
  "references": [
    {
      "type": "informative",
      "authority": "qudt",
      "uri": "http://qudt.org/vocab/quantitykind/ExposureOfIonizingRadiation"
    }
  ]
}