Il Nuovo Cimento A (1971-1996)

, Volume 105, Issue 4, pp 527–534 | Cite as

Analysis of the cross-sections of protons emitted at backward angles from4He-induced reactions at (11.2÷27.5) MeV/A

  • B. C. Botchev
  • Chr V. Christov
  • T. Kutsarova


Summed exclusive proton cross-sections at angles of 45° and 135° are obtained for the159Tb (4He, pxnγ) reactions atE(4He)=45, 75 and 110 MeV and for the209Bi (4He, pxnγ) reactions atE(4He)=45, 75 MeV from particle—γ-ray coincidence experiments. The experimental data are analyzed in the framework of the complete fusion—statistical decay model. It is shown that the summed exclusive proton spectra at backward angle of ϑ=135° with respect to the beam direction and particularly their high-energy parts cannot be explained by the model considered. A conclusion is drawn that an additional reaction mechanism intermediate with respect to both compound and direct ones should be invoked.


22.55 -3H-,3He-, and4He-induced reactions and scattering 


25.55.Fm - Few-nucleon transfer reactions 


25.70.Gh - Compound nucleus properties and decays 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    H. C. Britt andA. R. Quinton:Phys. Rev.,124, 877 (1961).ADSCrossRefGoogle Scholar
  2. [2]
    H. Utsunomia, T. Nomura, T. Inamura, T. Sugitate andT. Motobayashi:Nucl. Phys. A,334, 127 (1980).ADSCrossRefGoogle Scholar
  3. [3]
    B. Bochev, R. M. Lieder, T. Kutsarova, T. Morek andJ.-P. Didelez:Nucl. Phys. A,458, 429 (1986).ADSCrossRefGoogle Scholar
  4. [4]
    B. Bochev, T. Kutsarova andR. M. Lieder:Nucl. Phys. A,518, 401 (1990).ADSCrossRefGoogle Scholar
  5. [5]
    J. P. Bondorf, I. N. De, A. O. T. Karvinen, G. Fai andB. Jakobsson:Phys. Lett. B,89, 162 (1979);J. P. Bondorf, I. N. De, A. O. T. Karvinen, G. Fai, B. Jakobsson andI. Randrup:Nucl. Phys. A,333, 285 (1980).ADSCrossRefGoogle Scholar
  6. [6]
    B. Bochev, R. M. Lieder, T. Kutsarova, T. Morek, A. Neskakis andJ.-P. Didelez:Proceedings of the VI International School on Nuclear Physics, Neutron Physics and Nuclear Energy, Varna, September 12–21, 1983.Google Scholar
  7. [7]
    R. J. de Meijer andR. Kamermans:Rev. Mod. Phys.,57, 147 (1985).ADSCrossRefGoogle Scholar
  8. [8]
    J. R. Wu, C. C. Chang, H. D. Holmgren andR. W. Koontz:Phys. Rev. C,20, 1284 (1979);R. W. Koontz, C. C. Chang, H. D. Holmgren andJ. R. Wu:Phys. Rev. Lett.,43, 1862 (1979).ADSCrossRefGoogle Scholar
  9. [9]
    M. Hilman andY. Eyal: Code JULIAN (unpublished);A. Gavron:Phys. Rev. C,21, 230 (1980).Google Scholar
  10. [10]
    B. L. Berman andS. C. Fultz:Rev. Mod. Phys.,47, 713 (1975).ADSCrossRefGoogle Scholar
  11. [11]
    Chr. V. Cristov, T. Kutsarova andB. Bochev:Z. Phys. A,325, 73 (1986).ADSGoogle Scholar
  12. [12]
    I. I. Delchev, I. Zh. Petkov andChr. V. Christov: Com. JINR, R4-8537, Dubna, 1975;I. I. Delchev, I. Zh. Petkov andE. K. Marchev:Z. Phys. A,290, 273 (1979).Google Scholar
  13. [13]
    R. Bass:Phys. Rev. Lett.,39, 265 (1977).ADSCrossRefGoogle Scholar
  14. [14]
    B. Bochev, Chr. V. Christov andT. Kutsarova:Z. Phys. A,333, 367 (1989).ADSGoogle Scholar
  15. [15]
    G. G. Ohlsen:Nucl. Instrum. Methods,37, 240 (1965).ADSCrossRefGoogle Scholar

Copyright information

© Società Italiana di Fisica 1992

Authors and Affiliations

  • B. C. Botchev
    • 1
  • Chr V. Christov
    • 1
  • T. Kutsarova
    • 1
  1. 1.Institute for Nuclear Research and Nuclear EnergySofiaBulgaria

Personalised recommendations