XML
主要な元素同位体 - XML
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
<?xml version="1.0" encoding="UTF-8"?>
<items>
<item>
<code>1</code>
<slug>hydrogen-isotopes</slug>
<name>水素の同位体</name>
<description>水素の3つの同位体（プロチウム、重水素、トリチウム）。</description>
<element_atomicNumber>1</element_atomicNumber>
<element_nameEn>Hydrogen</element_nameEn>
<element_nameJa>水素</element_nameJa>
<element_symbol>H</element_symbol>
<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"}]</isotopes>
</item>
<item>
<code>2</code>
<slug>helium-isotopes</slug>
<name>ヘリウムの同位体</name>
<description>ヘリウムの2つの安定同位体（ヘリウム3、ヘリウム4）。</description>
<element_atomicNumber>2</element_atomicNumber>
<element_nameEn>Helium</element_nameEn>
<element_nameJa>ヘリウム</element_nameJa>
<element_symbol>He</element_symbol>
<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}]</isotopes>
</item>
<item>
<code>6</code>
<slug>carbon-isotopes</slug>
<name>炭素の同位体</name>
<description>炭素の2つの安定同位体と放射性同位体炭素14。</description>
<element_atomicNumber>6</element_atomicNumber>
<element_nameEn>Carbon</element_nameEn>
<element_nameJa>炭素</element_nameJa>
<element_symbol>C</element_symbol>
<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"}]</isotopes>
</item>
<item>
<code>7</code>
<slug>nitrogen-isotopes</slug>
<name>窒素の同位体</name>
<description>窒素の2つの安定同位体（窒素14、窒素15）。</description>
<element_atomicNumber>7</element_atomicNumber>
<element_nameEn>Nitrogen</element_nameEn>
<element_nameJa>窒素</element_nameJa>
<element_symbol>N</element_symbol>
<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}]</isotopes>
</item>
<item>
<code>8</code>
<slug>oxygen-isotopes</slug>
<name>酸素の同位体</name>
<description>酸素の3つの安定同位体（酸素16、酸素17、酸素18）。</description>
<element_atomicNumber>8</element_atomicNumber>
<element_nameEn>Oxygen</element_nameEn>
<element_nameJa>酸素</element_nameJa>
<element_symbol>O</element_symbol>
<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}]</isotopes>
</item>
<item>
<code>26</code>
<slug>iron-isotopes</slug>
<name>鉄の同位体</name>
<description>鉄の4つの安定同位体（鉄54、鉄56、鉄57、鉄58）。</description>
<element_atomicNumber>26</element_atomicNumber>
<element_nameEn>Iron</element_nameEn>
<element_nameJa>鉄</element_nameJa>
<element_symbol>Fe</element_symbol>
<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}]</isotopes>
</item>
<item>
<code>82</code>
<slug>lead-isotopes</slug>
<name>鉛の同位体</name>
<description>鉛の4つの安定同位体（鉛204、鉛206、鉛207、鉛208）。</description>
<element_atomicNumber>82</element_atomicNumber>
<element_nameEn>Lead</element_nameEn>
<element_nameJa>鉛</element_nameJa>
<element_symbol>Pb</element_symbol>
<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}]</isotopes>
</item>
<item>
<code>92</code>
<slug>uranium-isotopes</slug>
<name>ウランの同位体</name>
<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）。</description>
<element_atomicNumber>92</element_atomicNumber>
<element_nameEn>Uranium</element_nameEn>
<element_nameJa>ウラン</element_nameJa>
<element_symbol>U</element_symbol>
<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"}]</isotopes>
</item>
<item>
<code>94</code>
<slug>plutonium-isotopes</slug>
<name>プルトニウムの同位体</name>
<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）。</description>
<element_atomicNumber>94</element_atomicNumber>
<element_nameEn>Plutonium</element_nameEn>
<element_nameJa>プルトニウム</element_nameJa>
<element_symbol>Pu</element_symbol>
<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"}]</isotopes>
</item>
</items>