放射性崩壊系列 ほうしゃせいほうかいけいれつ Meanings Noun radioactive decay series See also: 崩壊系列 (ほうかいけいれつ). Kanji 放 release. Read as ホウ. 射 shoot. Read as シャ. 性 nature. Read as セイ. 崩 collapse. Read as ホウ. 壊 destroy. Read as カイ. 系 system. Read as ケイ. 列 row. Read as レツ. Word lists Physics Jinuma: Japanese Dictionary · Word lists