原子核崩壊 げんしかくほうかい Meanings Noun nuclear decay See also: 放射性崩壊 (ほうしゃせいほうかい). Kanji 原 original. Read as ゲン. 子 child 核 nucleus. Read as カク. 崩 collapse. Read as ホウ. 壊 destroy. Read as カイ. Word lists Physics Jinuma: Japanese Dictionary · Word lists