Il Nuovo Cimento (1955-1965)

, Volume 28, Issue 6, pp 1464–1483 | Cite as

Small-angle photoproduction of single positive pions on hydrogen at energies around the « second resonance »

  • M. Beneventano
  • R. Finzi
  • L. Mezzetti
  • L. Paoluzi
  • S. Tazzari
Article
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Summary

Cross-sections of single positive pions produced in hydrogen by photons of laboratory energies between 550 and 900 MeV at centre of-mass angle between 0° and 10° have been measured, using a magnetic spectrometer and an appropriate counter arrangement. The experiment is described in detail. Angular distributions at constant y-ray energy and the dependence of the differential cross-section on energy at variousconstant centre-of-mass angles are given and their significance discussed.

Riassunto

È stata misurata la sezione d’urto per fotoproduzione singola di pioni in idrogenoda parte di fotoni di energia oompresa tra 550 e 900 MeV (S.L.) e per angoli di emissione del pione oompresi tra 0° e 10° (cm.). Viene descritto in dettaglio il dispositivo sperimentale costituito da uno spettrometro magnetico e da un opportuno telescopio di contatori. Vengono presentate e discusse le distribuzioni angolari ad energia costante dei raggi γ e la dipendenza dall’energia dei fotoni della sezione d’urto differenziale a, vari angoli nel sistema di riferimento del baricentro.

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Copyright information

© Società Italiana di Fisica 1963

Authors and Affiliations

  • M. Beneventano
    • 1
    • 2
  • R. Finzi
    • 1
    • 2
  • L. Mezzetti
    • 1
    • 2
  • L. Paoluzi
    • 1
    • 2
  • S. Tazzari
    • 1
    • 2
  1. 1.Istituto di Fisica dell’ UniversitàRoma
  2. 2.Sezione di RomaIstituto Nazionale di Fisica NucleareItalia

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