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Il Nuovo Cimento (1943-1954)

, Volume 6, Issue 2, pp 151–157 | Cite as

Nuovo metodo per la determinazione dell'energia dei quanti γ emessi da sorgenti deboli

  • M. Ceccarelli
  • M. Merlin
  • A. Rostagni
Note Tecniche

Riassunto

Si discute la possibilità di applicare lo spettrografo magnetico diG. Occhialini alla determinazione dell'energia dei quanti γ, attraverso l'effetto fotoelettrico o l'effetto Compto di questi su un opportuno radiatore. Esperienze preliminari col potassio e col radio dimostrano questa possibilità. Il metodo appare particolarmente vantaggioso per sorgenti deboli ed estese. Vengono esposti pure i risultati di misure sullo spettro β del potassio.

Summary

The circular magnetic spectrograph introduced byG. Occhialini for the investigation of β-ray spectra with very low intensity (described inNat.,128, 374 (1931), byD. Bocciarelli) can be also applied to γ-ray spectra. This possibility is discussed, and proved by preliminary experiments on the γ-rays of K40 and Ra B+C, which are described here. As a secondary radiator Pb (photoelectric effect) and Al (Compton effect) have been used. The metod is expected to be particularly useful for extended radioactive sources of low intensity. Preliminary experiments on β-rays from K40 are also reported.

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Copyright information

© Società Italiana di Fisica 1949

Authors and Affiliations

  • M. Ceccarelli
    • 1
  • M. Merlin
    • 1
  • A. Rostagni
    • 1
  1. 1.Centro per lo studio degli ioni veloci del C.N.R.Istituto di Fisica dell'Università di PadovaPadovaItaly

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