{
  "version": "fr07-evaluated-masses-v1",
  "evaluation": "AME2020, March 2021 publication, unrounded tables",
  "sourceDate": "2021-03-03",
  "units": "keV",
  "kind": "evaluated numerical facts plus recalculated separation energies",
  "formula": "S_n = Delta(Z,A-1) + Delta(n) - Delta(Z,A); S_2n = Delta(Z,A-2) + 2 Delta(n) - Delta(Z,A)",
  "atomicMassConvention": "Same-Z electronic rest masses cancel. These are AME atomic-mass separation combinations; tiny isotope-dependent electronic binding differences are not separately corrected.",
  "uncertainties": "Input marginal errors and published reaction-table errors are preserved. The full evaluation covariance is absent from this excerpt. No independent-mass quadrature is used.",
  "datedStatus": "Hash-marked estimates are the status in the frozen AME2020 tables, not a statement about current experimental knowledge.",
  "rows": [
    {
      "nuclide": "8Be",
      "N": 4,
      "Z": 4,
      "A": 8,
      "massExcessKeV": {
        "value": 4941.672,
        "extrapolated": false,
        "original": "4941.672"
      },
      "massExcessUncertaintyKeV": {
        "value": 0.035,
        "extrapolated": false,
        "original": "0.035"
      }
    },
    {
      "nuclide": "9Be",
      "N": 5,
      "Z": 4,
      "A": 9,
      "massExcessKeV": {
        "value": 11348.451,
        "extrapolated": false,
        "original": "11348.451"
      },
      "massExcessUncertaintyKeV": {
        "value": 0.076,
        "extrapolated": false,
        "original": "0.076"
      },
      "Sn": {
        "fromMassExcessKeV": 1664.539060000001,
        "publishedCompanionKeV": 1664.5388,
        "publishedCompanionUncertaintyKeV": 0.0843,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "1664.5388",
        "publishedUncertaintyOriginal": "0.0843",
        "differenceKeV": 0.00026000000093517883,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "10Be",
      "N": 6,
      "Z": 4,
      "A": 10,
      "massExcessKeV": {
        "value": 12607.487,
        "extrapolated": false,
        "original": "12607.487"
      },
      "massExcessUncertaintyKeV": {
        "value": 0.081,
        "extrapolated": false,
        "original": "0.081"
      },
      "Sn": {
        "fromMassExcessKeV": 6812.28206,
        "publishedCompanionKeV": 6812.2824,
        "publishedCompanionUncertaintyKeV": 0.0519,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "6812.2824",
        "publishedUncertaintyOriginal": "0.0519",
        "differenceKeV": -0.0003400000005058246,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": 8476.821119999999,
        "publishedCompanionKeV": 8476.8212,
        "publishedCompanionUncertaintyKeV": 0.0883,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "8476.8212",
        "publishedUncertaintyOriginal": "0.0883",
        "differenceKeV": -8.000000161700882e-05,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "11Be",
      "N": 7,
      "Z": 4,
      "A": 11,
      "massExcessKeV": {
        "value": 20177.169,
        "extrapolated": false,
        "original": "20177.169"
      },
      "massExcessUncertaintyKeV": {
        "value": 0.238,
        "extrapolated": false,
        "original": "0.238"
      },
      "Sn": {
        "fromMassExcessKeV": 501.6360599999971,
        "publishedCompanionKeV": 501.6358,
        "publishedCompanionUncertaintyKeV": 0.2511,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "501.6358",
        "publishedUncertaintyOriginal": "0.2511",
        "differenceKeV": 0.00025999999706982635,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": 7313.918119999995,
        "publishedCompanionKeV": 7313.9182,
        "publishedCompanionUncertaintyKeV": 0.2497,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "7313.9182",
        "publishedUncertaintyOriginal": "0.2497",
        "differenceKeV": -8.000000525498763e-05,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "12Be",
      "N": 8,
      "Z": 4,
      "A": 12,
      "massExcessKeV": {
        "value": 25077.761,
        "extrapolated": false,
        "original": "25077.761"
      },
      "massExcessUncertaintyKeV": {
        "value": 1.909,
        "extrapolated": false,
        "original": "1.909"
      },
      "Sn": {
        "fromMassExcessKeV": 3170.726060000001,
        "publishedCompanionKeV": 3170.7254,
        "publishedCompanionUncertaintyKeV": 1.9233,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "3170.7254",
        "publishedUncertaintyOriginal": "1.9233",
        "differenceKeV": 0.0006600000010621443,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": 3672.362119999998,
        "publishedCompanionKeV": 3672.3612,
        "publishedCompanionUncertaintyKeV": 1.9096,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "3672.3612",
        "publishedUncertaintyOriginal": "1.9096",
        "differenceKeV": 0.0009199999981319706,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "14O",
      "N": 6,
      "Z": 8,
      "A": 14,
      "massExcessKeV": {
        "value": 8007.781,
        "extrapolated": false,
        "original": "8007.781"
      },
      "massExcessUncertaintyKeV": {
        "value": 0.025,
        "extrapolated": false,
        "original": "0.025"
      }
    },
    {
      "nuclide": "15O",
      "N": 7,
      "Z": 8,
      "A": 15,
      "massExcessKeV": {
        "value": 2855.622,
        "extrapolated": false,
        "original": "2855.622"
      },
      "massExcessUncertaintyKeV": {
        "value": 0.49,
        "extrapolated": false,
        "original": "0.490"
      },
      "Sn": {
        "fromMassExcessKeV": 13223.477060000001,
        "publishedCompanionKeV": 13223.477,
        "publishedCompanionUncertaintyKeV": 0.4908,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "13223.4770",
        "publishedUncertaintyOriginal": "0.4908",
        "differenceKeV": 6.000000030326191e-05,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "16O",
      "N": 8,
      "Z": 8,
      "A": 16,
      "massExcessKeV": {
        "value": -4737.00217,
        "extrapolated": false,
        "original": "-4737.00217"
      },
      "massExcessUncertaintyKeV": {
        "value": 0.0003,
        "extrapolated": false,
        "original": "0.00030"
      },
      "Sn": {
        "fromMassExcessKeV": 15663.942229999999,
        "publishedCompanionKeV": 15663.9424,
        "publishedCompanionUncertaintyKeV": 0.4902,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "15663.9424",
        "publishedUncertaintyOriginal": "0.4902",
        "differenceKeV": -0.000170000001162407,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": 28887.419289999998,
        "publishedCompanionKeV": 28887.4195,
        "publishedCompanionUncertaintyKeV": 0.0252,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "28887.4195",
        "publishedUncertaintyOriginal": "0.0252",
        "differenceKeV": -0.0002100000019709114,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "17O",
      "N": 9,
      "Z": 8,
      "A": 17,
      "massExcessKeV": {
        "value": -808.76421,
        "extrapolated": false,
        "original": "-808.76421"
      },
      "massExcessUncertaintyKeV": {
        "value": 0.00064,
        "extrapolated": false,
        "original": "0.00064"
      },
      "Sn": {
        "fromMassExcessKeV": 4143.0801,
        "publishedCompanionKeV": 4143.0801,
        "publishedCompanionUncertaintyKeV": 0.0008,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "4143.0801",
        "publishedUncertaintyOriginal": "0.0008",
        "differenceKeV": 0.0,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": 19807.02233,
        "publishedCompanionKeV": 19807.0225,
        "publishedCompanionUncertaintyKeV": 0.4902,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "19807.0225",
        "publishedUncertaintyOriginal": "0.4902",
        "differenceKeV": -0.00016999999934341758,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "18O",
      "N": 10,
      "Z": 8,
      "A": 18,
      "massExcessKeV": {
        "value": -782.81634,
        "extrapolated": false,
        "original": "-782.81634"
      },
      "massExcessUncertaintyKeV": {
        "value": 0.00064,
        "extrapolated": false,
        "original": "0.00064"
      },
      "Sn": {
        "fromMassExcessKeV": 8045.37019,
        "publishedCompanionKeV": 8045.3702,
        "publishedCompanionUncertaintyKeV": 0.001,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "8045.3702",
        "publishedUncertaintyOriginal": "0.0010",
        "differenceKeV": -1.0000000656873453e-05,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": 12188.450289999999,
        "publishedCompanionKeV": 12188.4503,
        "publishedCompanionUncertaintyKeV": 0.0011,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "12188.4503",
        "publishedUncertaintyOriginal": "0.0011",
        "differenceKeV": -1.0000001566368155e-05,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "19O",
      "N": 11,
      "Z": 8,
      "A": 19,
      "massExcessKeV": {
        "value": 3332.858,
        "extrapolated": false,
        "original": "3332.858"
      },
      "massExcessUncertaintyKeV": {
        "value": 2.637,
        "extrapolated": false,
        "original": "2.637"
      },
      "Sn": {
        "fromMassExcessKeV": 3955.643719999999,
        "publishedCompanionKeV": 3955.6439,
        "publishedCompanionUncertaintyKeV": 2.637,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "3955.6439",
        "publishedUncertaintyOriginal": "2.6370",
        "differenceKeV": -0.00018000000090978574,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": 12001.01391,
        "publishedCompanionKeV": 12001.0141,
        "publishedCompanionUncertaintyKeV": 2.637,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "12001.0141",
        "publishedUncertaintyOriginal": "2.6370",
        "differenceKeV": -0.0001900000006571645,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "20O",
      "N": 12,
      "Z": 8,
      "A": 20,
      "massExcessKeV": {
        "value": 3796.172,
        "extrapolated": false,
        "original": "3796.172"
      },
      "massExcessUncertaintyKeV": {
        "value": 0.885,
        "extrapolated": false,
        "original": "0.885"
      },
      "Sn": {
        "fromMassExcessKeV": 7608.004059999999,
        "publishedCompanionKeV": 7608.0042,
        "publishedCompanionUncertaintyKeV": 2.7815,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "7608.0042",
        "publishedUncertaintyOriginal": "2.7815",
        "differenceKeV": -0.00014000000101077603,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": 11563.64778,
        "publishedCompanionKeV": 11563.6481,
        "publishedCompanionUncertaintyKeV": 0.8849,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "11563.6481",
        "publishedUncertaintyOriginal": "0.8849",
        "differenceKeV": -0.00032000000101106707,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "21O",
      "N": 13,
      "Z": 8,
      "A": 21,
      "massExcessKeV": {
        "value": 8062.034,
        "extrapolated": false,
        "original": "8062.034"
      },
      "massExcessUncertaintyKeV": {
        "value": 12.0,
        "extrapolated": false,
        "original": "12.000"
      },
      "Sn": {
        "fromMassExcessKeV": 3805.4560600000004,
        "publishedCompanionKeV": 3805.456,
        "publishedCompanionUncertaintyKeV": 12.0326,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "3805.4560",
        "publishedUncertaintyOriginal": "12.0326",
        "differenceKeV": 6.000000030326191e-05,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": 11413.46012,
        "publishedCompanionKeV": 11413.4601,
        "publishedCompanionUncertaintyKeV": 12.2863,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "11413.4601",
        "publishedUncertaintyOriginal": "12.2863",
        "differenceKeV": 1.9999999494757503e-05,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "22O",
      "N": 14,
      "Z": 8,
      "A": 22,
      "massExcessKeV": {
        "value": 9283.032,
        "extrapolated": false,
        "original": "9283.032"
      },
      "massExcessUncertaintyKeV": {
        "value": 56.921,
        "extrapolated": false,
        "original": "56.921"
      },
      "Sn": {
        "fromMassExcessKeV": 6850.32006,
        "publishedCompanionKeV": 6850.3198,
        "publishedCompanionUncertaintyKeV": 58.1722,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "6850.3198",
        "publishedUncertaintyOriginal": "58.1722",
        "differenceKeV": 0.00025999999979831045,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": 10655.776119999999,
        "publishedCompanionKeV": 10655.7758,
        "publishedCompanionUncertaintyKeV": 56.9279,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "10655.7758",
        "publishedUncertaintyOriginal": "56.9279",
        "differenceKeV": 0.00031999999919207767,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "23O",
      "N": 15,
      "Z": 8,
      "A": 23,
      "massExcessKeV": {
        "value": 14621.371,
        "extrapolated": false,
        "original": "14621.371"
      },
      "massExcessUncertaintyKeV": {
        "value": 121.712,
        "extrapolated": false,
        "original": "121.712"
      },
      "Sn": {
        "fromMassExcessKeV": 2732.979059999998,
        "publishedCompanionKeV": 2732.9795,
        "publishedCompanionUncertaintyKeV": 134.3643,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "2732.9795",
        "publishedUncertaintyOriginal": "134.3643",
        "differenceKeV": -0.00044000000207233825,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": 9583.29912,
        "publishedCompanionKeV": 9583.2993,
        "publishedCompanionUncertaintyKeV": 122.302,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "9583.2993",
        "publishedUncertaintyOriginal": "122.3020",
        "differenceKeV": -0.00018000000090978574,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "24O",
      "N": 16,
      "Z": 8,
      "A": 24,
      "massExcessKeV": {
        "value": 18500.404,
        "extrapolated": false,
        "original": "18500.404"
      },
      "massExcessUncertaintyKeV": {
        "value": 164.874,
        "extrapolated": false,
        "original": "164.874"
      },
      "Sn": {
        "fromMassExcessKeV": 4192.285059999998,
        "publishedCompanionKeV": 4192.2843,
        "publishedCompanionUncertaintyKeV": 204.9326,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "4192.2843",
        "publishedUncertaintyOriginal": "204.9326",
        "differenceKeV": 0.0007599999980811845,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": 6925.26412,
        "publishedCompanionKeV": 6925.2638,
        "publishedCompanionUncertaintyKeV": 174.4236,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "6925.2638",
        "publishedUncertaintyOriginal": "174.4236",
        "differenceKeV": 0.00032000000010157237,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "25O",
      "N": 17,
      "Z": 8,
      "A": 25,
      "massExcessKeV": {
        "value": 27329.03,
        "extrapolated": false,
        "original": "27329.030"
      },
      "massExcessUncertaintyKeV": {
        "value": 165.084,
        "extrapolated": false,
        "original": "165.084"
      },
      "Sn": {
        "fromMassExcessKeV": -757.3079399999988,
        "publishedCompanionKeV": -757.3077,
        "publishedCompanionUncertaintyKeV": 8.3205,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "-757.3077",
        "publishedUncertaintyOriginal": "8.3205",
        "differenceKeV": -0.00023999999882562406,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": 3434.9771199999996,
        "publishedCompanionKeV": 3434.9766,
        "publishedCompanionUncertaintyKeV": 205.1014,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "3434.9766",
        "publishedUncertaintyOriginal": "205.1014",
        "differenceKeV": 0.0005199999995966209,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "26O",
      "N": 18,
      "Z": 8,
      "A": 26,
      "massExcessKeV": {
        "value": 34661.041,
        "extrapolated": false,
        "original": "34661.041"
      },
      "massExcessUncertaintyKeV": {
        "value": 164.95,
        "extrapolated": false,
        "original": "164.950"
      },
      "Sn": {
        "fromMassExcessKeV": 739.3070599999992,
        "publishedCompanionKeV": 739.3077,
        "publishedCompanionUncertaintyKeV": 9.7073,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "739.3077",
        "publishedUncertaintyOriginal": "9.7073",
        "differenceKeV": -0.0006400000007715789,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": -18.000879999999597,
        "publishedCompanionKeV": -18.0001,
        "publishedCompanionUncertaintyKeV": 5.0,
        "extrapolatedInAME2020": false,
        "publishedValueOriginal": "-18.0001",
        "publishedUncertaintyOriginal": "5.0000",
        "differenceKeV": -0.000779999999597436,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "27O",
      "N": 19,
      "Z": 8,
      "A": 27,
      "massExcessKeV": {
        "value": 44670.0,
        "extrapolated": true,
        "original": "44670#"
      },
      "massExcessUncertaintyKeV": {
        "value": 500.0,
        "extrapolated": true,
        "original": "500#"
      },
      "Sn": {
        "fromMassExcessKeV": -1937.6409400000048,
        "publishedCompanionKeV": -1937.0,
        "publishedCompanionUncertaintyKeV": 527.0,
        "extrapolatedInAME2020": true,
        "publishedValueOriginal": "-1937#",
        "publishedUncertaintyOriginal": "527#",
        "differenceKeV": -0.6409400000047754,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": -1198.3338800000056,
        "publishedCompanionKeV": -1198.0,
        "publishedCompanionUncertaintyKeV": 527.0,
        "extrapolatedInAME2020": true,
        "publishedValueOriginal": "-1198#",
        "publishedUncertaintyOriginal": "527#",
        "differenceKeV": -0.3338800000055926,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    },
    {
      "nuclide": "28O",
      "N": 20,
      "Z": 8,
      "A": 28,
      "massExcessKeV": {
        "value": 52080.0,
        "extrapolated": true,
        "original": "52080#"
      },
      "massExcessUncertaintyKeV": {
        "value": 699.0,
        "extrapolated": true,
        "original": "699#"
      },
      "Sn": {
        "fromMassExcessKeV": 661.3180599999978,
        "publishedCompanionKeV": 661.0,
        "publishedCompanionUncertaintyKeV": 859.0,
        "extrapolatedInAME2020": true,
        "publishedValueOriginal": "661#",
        "publishedUncertaintyOriginal": "859#",
        "differenceKeV": 0.3180599999977858,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      },
      "S2n": {
        "fromMassExcessKeV": -1276.322880000007,
        "publishedCompanionKeV": -1276.0,
        "publishedCompanionUncertaintyKeV": 718.0,
        "extrapolatedInAME2020": true,
        "publishedValueOriginal": "-1276#",
        "publishedUncertaintyOriginal": "718#",
        "differenceKeV": -0.3228800000069896,
        "massSubtractionUncertainty": null,
        "uncertaintyNote": "Use the published companion uncertainty; no independent-mass uncertainty is assigned."
      }
    }
  ],
  "shellGapIndicators": [
    {
      "nuclide": "22O",
      "N": 14,
      "definition": "S2n(Z,N) - S2n(Z,N+2)",
      "fromPublishedCompanionsKeV": 3730.5119999999997,
      "fromMassExcessKeV": 3730.511999999999,
      "standardDeviationUpperBoundKeV": 231.3515,
      "uncertaintyNote": "Conservative upper bound on the standard deviation from the sum of published marginal standard deviations; covariance is unavailable. This is not a confidence interval.",
      "interpretation": "Empirical two-neutron shell-gap indicator; pairing, correlations and continuum effects also contribute. It is not a single-particle level gap."
    },
    {
      "nuclide": "24O",
      "N": 16,
      "definition": "S2n(Z,N) - S2n(Z,N+2)",
      "fromPublishedCompanionsKeV": 6943.2639,
      "fromMassExcessKeV": 6943.264999999999,
      "standardDeviationUpperBoundKeV": 179.4236,
      "uncertaintyNote": "Conservative upper bound on the standard deviation from the sum of published marginal standard deviations; covariance is unavailable. This is not a confidence interval.",
      "interpretation": "Empirical two-neutron shell-gap indicator; pairing, correlations and continuum effects also contribute. It is not a single-particle level gap."
    }
  ],
  "comparisonMethod": "Read mass-excess fields and recompute separations, then compare against separately formatted published AME rct1/rct2 fields. This is an independent table/parser/arithmetic check, not an independent experiment.",
  "companionComparisons": [
    {
      "nuclide": "9Be",
      "quantity": "Sn",
      "differenceKeV": 0.00026000000093517883,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "10Be",
      "quantity": "Sn",
      "differenceKeV": -0.0003400000005058246,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "10Be",
      "quantity": "S2n",
      "differenceKeV": -8.000000161700882e-05,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "11Be",
      "quantity": "Sn",
      "differenceKeV": 0.00025999999706982635,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "11Be",
      "quantity": "S2n",
      "differenceKeV": -8.000000525498763e-05,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "12Be",
      "quantity": "Sn",
      "differenceKeV": 0.0006600000010621443,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "12Be",
      "quantity": "S2n",
      "differenceKeV": 0.0009199999981319706,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "15O",
      "quantity": "Sn",
      "differenceKeV": 6.000000030326191e-05,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "16O",
      "quantity": "Sn",
      "differenceKeV": -0.000170000001162407,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "16O",
      "quantity": "S2n",
      "differenceKeV": -0.0002100000019709114,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "17O",
      "quantity": "Sn",
      "differenceKeV": 0.0,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "17O",
      "quantity": "S2n",
      "differenceKeV": -0.00016999999934341758,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "18O",
      "quantity": "Sn",
      "differenceKeV": -1.0000000656873453e-05,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "18O",
      "quantity": "S2n",
      "differenceKeV": -1.0000001566368155e-05,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "19O",
      "quantity": "Sn",
      "differenceKeV": -0.00018000000090978574,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "19O",
      "quantity": "S2n",
      "differenceKeV": -0.0001900000006571645,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "20O",
      "quantity": "Sn",
      "differenceKeV": -0.00014000000101077603,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "20O",
      "quantity": "S2n",
      "differenceKeV": -0.00032000000101106707,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "21O",
      "quantity": "Sn",
      "differenceKeV": 6.000000030326191e-05,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "21O",
      "quantity": "S2n",
      "differenceKeV": 1.9999999494757503e-05,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "22O",
      "quantity": "Sn",
      "differenceKeV": 0.00025999999979831045,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "22O",
      "quantity": "S2n",
      "differenceKeV": 0.00031999999919207767,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "23O",
      "quantity": "Sn",
      "differenceKeV": -0.00044000000207233825,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "23O",
      "quantity": "S2n",
      "differenceKeV": -0.00018000000090978574,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "24O",
      "quantity": "Sn",
      "differenceKeV": 0.0007599999980811845,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "24O",
      "quantity": "S2n",
      "differenceKeV": 0.00032000000010157237,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "25O",
      "quantity": "Sn",
      "differenceKeV": -0.00023999999882562406,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "25O",
      "quantity": "S2n",
      "differenceKeV": 0.0005199999995966209,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "26O",
      "quantity": "Sn",
      "differenceKeV": -0.0006400000007715789,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "26O",
      "quantity": "S2n",
      "differenceKeV": -0.000779999999597436,
      "comparisonToleranceKeV": 0.002,
      "extrapolatedInAME2020": false
    },
    {
      "nuclide": "27O",
      "quantity": "Sn",
      "differenceKeV": -0.6409400000047754,
      "comparisonToleranceKeV": 1.6,
      "extrapolatedInAME2020": true
    },
    {
      "nuclide": "27O",
      "quantity": "S2n",
      "differenceKeV": -0.3338800000055926,
      "comparisonToleranceKeV": 1.6,
      "extrapolatedInAME2020": true
    },
    {
      "nuclide": "28O",
      "quantity": "Sn",
      "differenceKeV": 0.3180599999977858,
      "comparisonToleranceKeV": 1.6,
      "extrapolatedInAME2020": true
    },
    {
      "nuclide": "28O",
      "quantity": "S2n",
      "differenceKeV": -0.3228800000069896,
      "comparisonToleranceKeV": 1.6,
      "extrapolatedInAME2020": true
    }
  ],
  "limits": "These ground-state mass combinations diagnose threshold changes. They neither determine a unique nuclear interaction nor establish a halo wavefunction or reproduce a many-body calculation."
}