Hard shower

Japanese: hard shower(英語表記)hardshower
Hard shower

…The name comes from the fact that the trajectory of the projectile is like a shower. When the incident particle is a hadron, multiple π mesons are produced by collision with the atomic nucleus, which is called a hard shower. When this phenomenon occurs repeatedly in matter and increases in number, it is called a nuclear cascade shower or N-cascade. …

*Some terminology explanations that mention "hard shower" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…その飛跡がシャワー状になるのでこの名がある。入射粒子がハドロンの場合には原子核との衝突によってπ中間子の多重発生を起こし,ハードシャワーhard showerと呼ばれる。また,これが物質中で繰り返し発生して数を増す現象は,核カスケードシャワーnuclear cascade showerあるいはNカスケードN‐cascade,核カスケードという。…

※「hard shower」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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