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出典:Wiktionary
delta ray (複数形 delta rays)
出典:Wikipedia
出典:『Wikipedia』 (2011/02/19 05:10 UTC 版)
A delta ray is sometimes used to describe any recoil particle caused by secondary ionization. The term was coined by J.J. Thomson. It is entirely unrelated to the family of subatomic particles named delta baryon.
delta ray