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Il Nuovo Cimento (1955-1965)

, Volume 22, Issue 1, pp 135–144 | Cite as

Energy spectrum of photoneutrons from cobalt

  • V. Emma
  • C. Milone
  • A. Rubbino
  • S. Jannelli
  • P. Mezzawares
Article

Summary

The energy spectrum of the photoneutrons emitted at 90‡ from cobalt irradiated by a collimated 30 MeV bremsstrahlung beam is studied by recording the protons recoil tracks in L-4 Ilford photoemulsions 400 μm thick. The neutron spectrum is analysed in neutron energy steps of 0.5 MeV, starting from Enmin=2 MeV. A maximum around En=(4÷5) MeV in the experimental spectrum gives evidence of a contribution of other processes besides the evaporation. The interpretation of the experimental results is discussed.

Riassunto

Si studia lo spettro energetico dei fotoneutroni emessi a 90‡ dal cobalto irradiato con bremsstrahlung di 30 MeV. I neutroni sono rilevati mediante i protoni di rinculo in emulsioni Ilford L-4 di 400 μm. Lo spettro energetico è stato analizzato in intervalli di 0.5 MeV a partire da En=2 MeV. Si mette in evidenza nello spettro una ≪coda≫ di alta energia ed un massimo intorno ad En=(4÷5) MeV che indicano, per l’emissione di neutroni, un contributo di altri processi oltre a quello di evaporazione. Si discutono i risultati sperimentali.

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Copyright information

© Società Italiana di Fisica 1961

Authors and Affiliations

  • V. Emma
    • 1
    • 2
    • 3
  • C. Milone
    • 1
    • 2
    • 3
  • A. Rubbino
    • 1
    • 2
    • 3
  • S. Jannelli
    • 4
    • 5
  • P. Mezzawares
    • 4
    • 5
  1. 1.Istituto di Fisica dell’UniversitàCatania
  2. 2.Centro Siciliano di Fisica NucleareCatania
  3. 3.Istituto Nazionale di Fisica NucleateCatania
  4. 4.Istituto di Fisica dell’UniversitàMessina
  5. 5.Istituto Nazionale di Fisica NucleareMessina

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