崩壊系列

• 読み: ほうかいけいれつ
• ローマ字: hokai keiretsu
• 漢字の分解: 崩 (hou) — collapse, crumble; 壊 (kai) — break, destroy; 系 (kei) — system, lineage; 列 (retsu) — row, series
• 発音: /hoː.kai.keː.ɾe.tsɯ/

意味

Decay chain; radioactive series. A sequence of radioactive decays by which an unstable nuclide passes through successive transformations until a stable nuclide is reached.

In nuclear physics and radiochemistry, a 崩壊系列 traces the successive transmutations of a radioactive parent nuclide through intermediate daughter nuclides until a stable end product is formed. The three classical natural series are the uranium, thorium, and actinium series. Understanding decay chains is essential in nuclear waste management, radiometric dating, and radiation safety.

例文

1. ウランの崩壊系列は最終的に安定した鉛の同位体で終わる。
2. 崩壊系列の途中に存在する短半減期の核種は、放射能測定で重要な役割を果たす。
3. 放射性廃棄物の管理において、崩壊系列全体の半減期を考慮することが不可欠だ。

使い方ガイド

場面: nuclear physics, radiochemistry, geology

トーン: technical

起源と歴史

Compound noun: 崩壊 (collapse, decay) + 系列 (series, sequence). The term reflects the sequential nature of radioactive decay — each unstable nucleus collapsing into the next in the chain.

文化的背景

時代: Showa–Modern

世代: Adults (specialist)

社会的背景: Academic/Scientific