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Il Nuovo Cimento (1955-1965)

, Volume 6, Issue 1, pp 98–110 | Cite as

On the azimuthal distribution ofK photoelectrons by polarized photons

  • D. Brini
  • L. Peli
  • O. Rimondi
  • P. Veronesi
Article

Summary

The angular distribution of K-photoelectrons has been investigated in Pb using polarized Compton scattered photons of a60Co source. The selection of the events has been made by associating the photoelectrons to the correspondent fluorescence X-ray. The measurement was performed by determining the behaviour of the asymmetry ratio versus energy: we define the asymmetry ratio as the number of electrons emitted perpendicularly to the Compton scattering plane divided by the number of those emitted in the scattering plane. The results obtained do not seem to agree with Sauter’s theory, but rather with Archibald’s calculations.

Riassunto

È stata osservata la distribuzione angolare dei foto-elettroni in Pb da fotoni polarizzati per effetto Compton, usando a questo scopo una sorgente di80Co collimata. La selezione degli eventi fotoelettrici è stata misurata rivelando i fotoelettroni in coincidenza eon i corrispondenti raggi X di fluorescenza. La misura è stata eseguita per determinare l’andamento del rapporto di asimmetria in funzione dell’energia: tale rapporto è stato definite dal numero dei fotoelettroni emessi perpendicolarmente al piano di scattering Compton diviso dal numero di fotoelettroni emessi nel piano di scattering I risu3tati ottenuti non sono in accordo con la teoria di Sauter ma sembrano piuttosto vicini al calcolo di Archibald.

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Copyright information

© Società Italiana di Fisica 1957

Authors and Affiliations

  • D. Brini
    • 1
    • 2
  • L. Peli
    • 1
    • 2
  • O. Rimondi
    • 1
    • 2
  • P. Veronesi
    • 1
    • 2
  1. 1.Istituto di Fisica dell’ UniversitàBologna
  2. 2.Gruppo di BolognaIstituto Nazionale di Fisica NucleateItalia

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