Archive of historical materials

Decay of the U particle (Note by S. Sakata)

OU1938-B4 (6 pages) Date: None

In this note, Shoichi Sakata summarized the transition probability of U particle into the electron. He calculated the probability of U particles (presently known as charged pi-mesons) breaking down into electrons and neutrinos. Yukawa et. al. also investigated the possibility of the beta decay of nuclei occurring by way of U particles. Sakata’s handwriting is close to block letters and carefully written for easy legibility.

(English translation by KSI.)
Historical materials courtesy of Yukawa Hall Archival Library, Yukawa Institute for Theoretical Physics, Kyoto University (s02-06-008)
OU1938-B4-s02-06-008
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