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主要な元素同位体 - JSON
主要な元素同位体は、原子番号1から94までの重要な元素について、それぞれの同位体（質量数の異なる原子核）をまとめたデータです。安定同位体と放射性同位体を区別し、天然存在比や半減期などの物理的性質を含みます。水素のプロチウム・重水素・トリチウムから、核燃料として重要なウランやプルトニウムの同位体まで、科学・医学・エネルギー分野で重要な同位体情報を網羅しています。
化学
同位体
原子核
放射性同位体
安定同位体
元素周期表
原子番号
質量数
核物理学
[
{
"code": "1",
"slug": "hydrogen-isotopes",
"name": "水素の同位体",
"description": "水素の3つの同位体（プロチウム、重水素、トリチウム）。",
"element": {
"symbol": "H",
"atomicNumber": 1,
"nameJa": "水素",
"nameEn": "Hydrogen"
},
"isotopes": [
{
"massNumber": 1,
"symbol": "¹H",
"name": "Protium",
"stability": "stable",
"naturalAbundance": 0.99985,
"halfLife": null
},
{
"massNumber": 2,
"symbol": "²H",
"name": "Deuterium",
"stability": "stable",
"naturalAbundance": 0.000115,
"halfLife": null
},
{
"massNumber": 3,
"symbol": "³H",
"name": "Tritium",
"stability": "radioactive",
"naturalAbundance": 0,
"halfLife": "12.32 years"
}
]
},
{
"code": "2",
"slug": "helium-isotopes",
"name": "ヘリウムの同位体",
"description": "ヘリウムの2つの安定同位体（ヘリウム3、ヘリウム4）。",
"element": {
"symbol": "He",
"atomicNumber": 2,
"nameJa": "ヘリウム",
"nameEn": "Helium"
},
"isotopes": [
{
"massNumber": 3,
"symbol": "³He",
"name": "Helium-3",
"stability": "stable",
"naturalAbundance": 0.00000134,
"halfLife": null
},
{
"massNumber": 4,
"symbol": "⁴He",
"name": "Helium-4",
"stability": "stable",
"naturalAbundance": 0.99999866,
"halfLife": null
}
]
},
{
"code": "6",
"slug": "carbon-isotopes",
"name": "炭素の同位体",
"description": "炭素の2つの安定同位体と放射性同位体炭素14。",
"element": {
"symbol": "C",
"atomicNumber": 6,
"nameJa": "炭素",
"nameEn": "Carbon"
},
"isotopes": [
{
"massNumber": 12,
"symbol": "¹²C",
"name": "Carbon-12",
"stability": "stable",
"naturalAbundance": 0.9893,
"halfLife": null
},
{
"massNumber": 13,
"symbol": "¹³C",
"name": "Carbon-13",
"stability": "stable",
"naturalAbundance": 0.0107,
"halfLife": null
},
{
"massNumber": 14,
"symbol": "¹⁴C",
"name": "Carbon-14",
"stability": "radioactive",
"naturalAbundance": 0,
"halfLife": "5,700 years"
}
]
},
{
"code": "7",
"slug": "nitrogen-isotopes",
"name": "窒素の同位体",
"description": "窒素の2つの安定同位体（窒素14、窒素15）。",
"element": {
"symbol": "N",
"atomicNumber": 7,
"nameJa": "窒素",
"nameEn": "Nitrogen"
},
"isotopes": [
{
"massNumber": 14,
"symbol": "¹⁴N",
"name": "Nitrogen-14",
"stability": "stable",
"naturalAbundance": 0.99636,
"halfLife": null
},
{
"massNumber": 15,
"symbol": "¹⁵N",
"name": "Nitrogen-15",
"stability": "stable",
"naturalAbundance": 0.00364,
"halfLife": null
}
]
},
{
"code": "8",
"slug": "oxygen-isotopes",
"name": "酸素の同位体",
"description": "酸素の3つの安定同位体（酸素16、酸素17、酸素18）。",
"element": {
"symbol": "O",
"atomicNumber": 8,
"nameJa": "酸素",
"nameEn": "Oxygen"
},
"isotopes": [
{
"massNumber": 16,
"symbol": "¹⁶O",
"name": "Oxygen-16",
"stability": "stable",
"naturalAbundance": 0.99757,
"halfLife": null
},
{
"massNumber": 17,
"symbol": "¹⁷O",
"name": "Oxygen-17",
"stability": "stable",
"naturalAbundance": 0.00038,
"halfLife": null
},
{
"massNumber": 18,
"symbol": "¹⁸O",
"name": "Oxygen-18",
"stability": "stable",
"naturalAbundance": 0.00205,
"halfLife": null
}
]
},
{
"code": "26",
"slug": "iron-isotopes",
"name": "鉄の同位体",
"description": "鉄の4つの安定同位体（鉄54、鉄56、鉄57、鉄58）。",
"element": {
"symbol": "Fe",
"atomicNumber": 26,
"nameJa": "鉄",
"nameEn": "Iron"
},
"isotopes": [
{
"massNumber": 54,
"symbol": "⁵⁴Fe",
"name": "Iron-54",
"stability": "stable",
"naturalAbundance": 0.05845,
"halfLife": null
},
{
"massNumber": 56,
"symbol": "⁵⁶Fe",
"name": "Iron-56",
"stability": "stable",
"naturalAbundance": 0.91754,
"halfLife": null
},
{
"massNumber": 57,
"symbol": "⁵⁷Fe",
"name": "Iron-57",
"stability": "stable",
"naturalAbundance": 0.02119,
"halfLife": null
},
{
"massNumber": 58,
"symbol": "⁵⁸Fe",
"name": "Iron-58",
"stability": "stable",
"naturalAbundance": 0.00282,
"halfLife": null
}
]
},
{
"code": "82",
"slug": "lead-isotopes",
"name": "鉛の同位体",
"description": "鉛の4つの安定同位体（鉛204、鉛206、鉛207、鉛208）。",
"element": {
"symbol": "Pb",
"atomicNumber": 82,
"nameJa": "鉛",
"nameEn": "Lead"
},
"isotopes": [
{
"massNumber": 204,
"symbol": "²⁰⁴Pb",
"name": "Lead-204",
"stability": "stable",
"naturalAbundance": 0.014,
"halfLife": null
},
{
"massNumber": 206,
"symbol": "²⁰⁶Pb",
"name": "Lead-206",
"stability": "stable",
"naturalAbundance": 0.241,
"halfLife": null
},
{
"massNumber": 207,
"symbol": "²⁰⁷Pb",
"name": "Lead-207",
"stability": "stable",
"naturalAbundance": 0.221,
"halfLife": null
},
{
"massNumber": 208,
"symbol": "²⁰⁸Pb",
"name": "Lead-208",
"stability": "stable",
"naturalAbundance": 0.524,
"halfLife": null
}
]
},
{
"code": "92",
"slug": "uranium-isotopes",
"name": "ウランの同位体",
"description": "ウランの3つの天然放射性同位体（ウラン238、ウラン235、ウラン234）。",
"element": {
"symbol": "U",
"atomicNumber": 92,
"nameJa": "ウラン",
"nameEn": "Uranium"
},
"isotopes": [
{
"massNumber": 238,
"symbol": "²³⁸U",
"name": "Uranium-238",
"stability": "radioactive",
"naturalAbundance": 0.9927,
"halfLife": "4.468 billion years"
},
{
"massNumber": 235,
"symbol": "²³⁵U",
"name": "Uranium-235",
"stability": "radioactive",
"naturalAbundance": 0.0072,
"halfLife": "704 million years"
},
{
"massNumber": 234,
"symbol": "²³⁴U",
"name": "Uranium-234",
"stability": "radioactive",
"naturalAbundance": 0.000055,
"halfLife": "245,500 years"
}
]
},
{
"code": "94",
"slug": "plutonium-isotopes",
"name": "プルトニウムの同位体",
"description": "プルトニウムの主な人工放射性同位体（プルトニウム238、239、240、241、242、244）。",
"element": {
"symbol": "Pu",
"atomicNumber": 94,
"nameJa": "プルトニウム",
"nameEn": "Plutonium"
},
"isotopes": [
{
"massNumber": 238,
"symbol": "²³⁸Pu",
"name": "Plutonium-238",
"stability": "radioactive",
"naturalAbundance": 0,
"halfLife": "87.7 years"
},
{
"massNumber": 239,
"symbol": "²³⁹Pu",
"name": "Plutonium-239",
"stability": "radioactive",
"naturalAbundance": 0,
"halfLife": "24,110 years"
},
{
"massNumber": 240,
"symbol": "²⁴⁰Pu",
"name": "Plutonium-240",
"stability": "radioactive",
"naturalAbundance": 0,
"halfLife": "6,560 years"
},
{
"massNumber": 241,
"symbol": "²⁴¹Pu",
"name": "Plutonium-241",
"stability": "radioactive",
"naturalAbundance": 0,
"halfLife": "14.4 years"
},
{
"massNumber": 242,
"symbol": "²⁴²Pu",
"name": "Plutonium-242",
"stability": "radioactive",
"naturalAbundance": 0,
"halfLife": "373,300 years"
},
{
"massNumber": 244,
"symbol": "²⁴⁴Pu",
"name": "Plutonium-244",
"stability": "radioactive",
"naturalAbundance": 0,
"halfLife": "80.8 million years"
}
]
}
]