{
  "MIN KNOWN ACTIVITY" : 0,
  "MAX KNOWN ACTIVITY" : 10,
  "isotopes" : [ {
    "shortName" : "F18",
    "longName" : "flourine-18",
    "halflife" : 6586.26,
    "positronFraction" : 0.97,
    "ldmConstant" : null
  }, {
    "shortName" : "Y90",
    "longName" : "yttrium-90",
    "halflife" : 230688,
    "positronFraction" : 3.1867e-5,
    "ldmConstant" : 4.986e-8
  }, {
    "shortName" : "NA22",
    "longName" : "sodium-22",
    "halflife" : 82100000,
    "positronFraction" : 0.905,
    "ldmConstant" : null
  }, {
    "shortName" : "GE68",
    "longName" : "germanium-68",
    "halflife" : 23410080,
    "positronFraction" : 0.890,
    "ldmConstant" : null
  }, {
    "shortName" : "C11",
    "longName" : "carbon-11",
    "halflife" : 1220.04,
    "positronFraction" : 0.998,
    "ldmConstant" : null
  }, {
    "shortName" : "N13",
    "longName" : "nitrogen-13",
    "halflife" : 598.2,
    "positronFraction" : 0.998,
    "ldmConstant" : null
  }, {
    "shortName" : "O15",
    "longName" : "oxygen-15",
    "halflife" : 122.24,
    "positronFraction" : 0.999,
    "ldmConstant" : null
  }, {
    "shortName" : "RB82",
    "longName" : "rubidium-82",
    "halflife" : 76.2,
    "positronFraction" : 0.950,
    "ldmConstant" : null
  } ]
}