N Cascade - N Cascade

Japanese: N カスケード - えぬかすけーど
N Cascade - N Cascade

…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 occurs repeatedly in a substance and increases in number, it is called a nuclear cascade shower or N-cascade. In the case of gamma rays and electrons, the interaction with the electric field within the atom causes gamma rays to create electron-positron pairs, and electrons and positrons to repeatedly emit gamma rays, so the shower is a mixture of gamma rays, electrons, and positrons, and is called an electromagnetic cascade shower or electromagnetic cascade. …

*Some of the terminology explanations that mention "N Cascade" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…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。γ線や電子の場合には原子内電場との相互作用によって,γ線は電子・陽電子対の創生を,また,電子,陽電子はγ線の放射を繰り返すため,シャワーの成分はγ線,電子,陽電子の混合したものとなり,電磁カスケードシャワーelectro‐magnetic cascade showerまたは電磁カスケードと呼ばれる。…

※「N カスケード」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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