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Il Nuovo Cimento (1955-1965)

, Volume 38, Issue 3, pp 1133–1141 | Cite as

(3He, α) Reactions on25Mg and26Mg at 5.50 MeV

  • I. Pilosofo
  • F. Pellegrini
Article

Summary

Angular distributions of α-particles from the25Mg(3He, α)24Mg and26Mg(3He, α)25Mg reactions, leading to the ground and the low excited states of24Mg and25Mg, were measured at a bombarding energy of 5.50 MeV. Relative total cross-sections were obtained from the experimental results for transitions to the ground, 1.37, 4.12, 4.23, 5.22 and 6 MeV states of24Mg and for transitions to the ground, 0.58,0.98, 1.61 and 1.96 MeV states of25Mg. The ratios of the total cross-sections were compared with the predictions of the theory of Hauser and Feshbach and a satisfactory agreement has been found. In addition, the transition to the ground state of25Mg in the26Mg(3He, α)25Mg reaction seems predominantly due to a direct interaction mechanism.

Riassunto

Sono state misurate le distribuzioni angolari ed energetiche delle particelle α emesse nelle reazioni25Mg(3He, α)24Mg e26Mg(3He, α)25Mg per l’energia della particella incidente di 5.5 MeV. Dai dati sperimentali si sono ricavati gli andamenti delle sezioni d’urto per le transizioni ai livelli 0, 1.37, 4.12, 4.23, 5.22 e 6 MeV del24Mg e per le transizioni ai livelli 0, 0.58, 0.98, 1.61 e 1.96 MeV del25Mg. I rapporti delle sezioni d’urto sperimentali sono in soddisfaoente accordo con quelli previsti dalla teoria di Hauser e Feshbach. La transizione al livello fondamentale del25Mg nella reazione26Mg(3He, α)25Mg sembra dovuta prineipalmente ad un meccanismo di interazione diretta.

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References

  1. (1).
    I. Filosofo, Z. Konieczny andF. Pellegrini:Nucl. Phys.,58, 522 (1964).CrossRefGoogle Scholar
  2. (2).
    S. Hinds, R. Middleton andA. E. Litherland:Proc. Butherford Int. Jubilee Gonf., Manchester (London, 1961), p. 305.Google Scholar
  3. (3).
    O. Hansen, E. Koltay, N. Lund andB. S. Madsen:Nucl. Phys.,51, 307 (1964).CrossRefGoogle Scholar
  4. (4).
    Z. Konieczny andF. Pellegrini: to be published.Google Scholar
  5. (5).
    T. H. Newton:Can. Journ. Phys.,34, 804 (1956).ADSCrossRefMATHGoogle Scholar
  6. (6).
    W. Hauser andH. Feshbach:Phys. Rev.,87, 366 (1952).ADSCrossRefMATHGoogle Scholar
  7. (7).
    H. Feshbach:Nuclear Spectroscopy, PartB, edited byF. Ajzenbee Selove (New York, 1960), p. 662.Google Scholar
  8. (8).
    T. Ericson:Nucl. Phys.,8, 265 (1958);11, 481 (1959).CrossRefMATHGoogle Scholar
  9. (9).
    J. Jänecke:Nuel. Phys.,48, 129 (1963).Google Scholar
  10. (10).
    N. MacDonald:Nucl. Phys.,33, 110 (1962).CrossRefGoogle Scholar

Copyright information

© Società Italiana di Fisica 1965

Authors and Affiliations

  • I. Pilosofo
    • 1
    • 2
  • F. Pellegrini
    • 1
    • 2
  1. 1.Laboratorio dell’Accelerators dell’UniversitàPadova
  2. 2.Seziorie di PadovaIstituto Nazionale di Fisica NucleareItalia

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