YAML
主要な元素同位体 - YAML
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"