Summary
The Čerenkov effect has been used to detect single μ-mesons in 6 m of air at atmospheric pressure. The yield of light and rate of occurrence of events is consistent with the classical theory of the effect. A separate experiment revealed that, in the absence of Čerenkov radiation, the production of light associated with ionization is <10−2 of that of Čerenkov radiation, or <4·10−6 of the rate of loss of energy by ionization for relativistic μ-mesons.
Riassunto
Si è ricorso all’effetto Čerenkov per rivelare singoli mesoni μ in 6 m d’aria a pressione atmosferica. La quantità di luce emessa e la frequenza degli eventi sono in accordo con la teoria classica dell’effetto. Un esperimento apposito ha mostrato che, in assenza di radiazione Čerenkov, la produzione di luce associata a ionizzazione è <10−2 di quella della radiazione Čerenkov, o <4·10−6 della perdita di energia per ionizzazione, per i mesoni μ relativistici.
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Barclay, F.R., Jelley, J.V. Čerenkov and isotropic radiations from single μ-mesons in air. Nuovo Cim 2, 27–37 (1955). https://doi.org/10.1007/BF02856004
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DOI: https://doi.org/10.1007/BF02856004