Skip to main content
SpringerLink
Log in

An exciton model approach to the analysis of α-particle-induced nuclear reactions

  • Published:
La Rivista del Nuovo Cimento (1971-1977)

Summary and conclusions

It is suggested that the exciton model is helpful in the interpretation of reaction data obtained by bombarding nuclei with α-particles of energy greater than about 20 MeV.

The comparison of the model predictions with experiments indicates that

a) the shapes of the spectra of the particles emitted from the reactions, the shapes of their excitation functions and the absolute values of the cross-section can be adequately reproduced without recourse to peculiar adjustments of parameters;

b) the assumption of an initial exciton numbern 0=4, corresponding to state configurations of the 4p-type, accounts generally for the observed (α, p) and (α,xn) reaction data, except that for nuclei of mass number around 50÷60 a certain amount of configuration mixing of 4p and 5p+lh states seems to be required;

c) the results are on the whole consistent with the hypothesis that the incident α-particle separates into its component nucleons on entering the Coulomb and nuclear fields of the target.

The study of (α, α′) reactions presents evidence that some fraction of the reaction cross-section is imputable to processes that cannot be described by the exciton model. This fraction amounts approximately to 15%, and is of the same order of magnitude as that deduced earlier in the case of proton-induced reactions. Such concurrence may suggest that in both cases the fraction which is not described by the model should depend on geometrical characteristics of the interaction between projectile and target nucleus; for instance the intervention of peripheral interactions, leading to collective excitation or to nucleon pick-up, might be proposed.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. S. N. Goshal:Phys. Rev.,80, 939 (1950).

    Article  ADS  Google Scholar 

  2. R. M. Eisberg, G. Igo andH. E. Wegner:Phys. Rev.,100, 1309 (1955).

    Article  ADS  Google Scholar 

  3. G. Igo andH. E. Wegner:Phys. Rev.,102, 1364 (1956).

    Article  ADS  Google Scholar 

  4. N. T. Porile:Phys. Rev.,115, 939 (1959).

    Article  ADS  Google Scholar 

  5. N. T. Porile:Phys. Rev.,116, 1193 (1959).

    Article  ADS  Google Scholar 

  6. N. O. Lassen andV. A. Sidorov:Nucl. Phys.,19, 579 (1960).

    Article  Google Scholar 

  7. S. Tanaka, M. Furukawa, T. Mikumo, S. Iwata, M. Yagi andH. Amano:Journ. Phys. Soc. Japan,15, 545, 1357 (1960).

    Article  ADS  Google Scholar 

  8. W. Swenson andN. Cindro:Phys. Rev.,123, 910 (1961).

    Article  ADS  Google Scholar 

  9. F. S. Houck andJ. M. Miller:Phys. Rev.,123, 231 (1961).

    Article  ADS  Google Scholar 

  10. V. A. Sidorov:Nucl. Phys.,35, 253 (1962).

    Article  MathSciNet  Google Scholar 

  11. E. A. Bryant, D. R. F. Cochran andJ. D. Knight:Phys. Rev.,130, 1512 (1963).

    Article  ADS  Google Scholar 

  12. K. L. Chen andJ. M. Miller:Phys. Rev.,134, B 1272 (1964).

    Article  ADS  Google Scholar 

  13. J. Matsuo, J. M. Matuszek, N. D. Dudey and {ScT. T. Sugihara}:Phys. Rev.,139, B 886 (1965).

    Article  ADS  Google Scholar 

  14. R. A. Esterlund andB. D. Pate:Nucl. Phys.,69, 401 (1965).

    Article  Google Scholar 

  15. R. W. West:Phys. Rev.,141, 1033 (1966).

    Article  ADS  Google Scholar 

  16. L. W. Swenson andC. R. Gruhn:Phys. Rev.,146, 886 (1966).

    Article  ADS  Google Scholar 

  17. D. Vinciguerra, K. Kotajima andR. E. Van de Vijver:Nucl. Phys.,77, 337 (1966).

    Article  Google Scholar 

  18. M. Furukawa:Nucl. Phys.,77, 565 (1966).

    Article  Google Scholar 

  19. G. C. Martin andR. C. Pilger:Nucl. Phys.,89, 481 (1966).

    Article  Google Scholar 

  20. V. E. Verdieck andJ. M. Miller:Phys. Rev.,153, 1253 (1967).

    Article  ADS  Google Scholar 

  21. N. E. Scott, J. W. Cobble andP. J. Daly:Nucl. Phys.,119 A, 131 (1968).

    Article  ADS  Google Scholar 

  22. F. H. Ruddy andB. D. Pate:Nucl. Phys.,127 A, 305 (1969).

    Article  ADS  Google Scholar 

  23. W. W. Bowman andM. Blann:Nucl. Phys.,131 A, 513 (1969).

    Article  ADS  Google Scholar 

  24. A. Demeyer, R. Chery, A. Chevarier, N. Chevarier, J. Tousset andTran Minh Duc:J. Physique,31, 847 (1970).

    Article  Google Scholar 

  25. M. T. Magda, A. Alevra, I. R. Lukas, D. Plostinaru, E. Trutia andM. Molea:Nucl. Phys.,140 A, 23 (1970).

    Article  ADS  Google Scholar 

  26. F. M. Lanzafame andM. Blann:Nucl. Phys.,142 A, 545 (1970).

    Article  ADS  Google Scholar 

  27. G. Chevenert, N. S. Chant, I. Halpern, C. Glashausser andD. L. Hendrie:Phys. Rev. Lett.,27, 434 (1971).

    Article  ADS  Google Scholar 

  28. S. M. Grimes, J. D. Anderson, B. A. Pohl, J. W. Mc Clure andC. Wong:Phys. Rev. C,3, 645 (1971);4, 607 (1971).

    Article  ADS  Google Scholar 

  29. H. E. Kurz, E. W. Jasper, K. Fischer andF. Hermes:Nucl. Phys.,168 A, 129 (1971).

    Article  ADS  Google Scholar 

  30. A. Alevra, R. Dimitrescu, I. R. Lukas, M. T. Magda, D. Plostinaru, E. Trutia, A. Chevarier, N. Chevarier, A. Demeyer andTran Minh Duc: LYCEN 7303 (1973).

  31. A. Chevarier, N. Chevarier, A. Demeyer, G. Hollinger, P. Pertosa andTran Minh Duc:Phys. Rev. C,8, 2155 (1973).

    Article  ADS  Google Scholar 

  32. M. Hille, P. Hille, M. Uhl andW. Weisz:Nucl. Phys.,198 A, 625 (1972).

    Article  ADS  Google Scholar 

  33. Landolt-Börnstein: Group I, Vol.5, Part B, edited byH. Schopper (Berlin, Heidelberg and New York, N. Y., 1973).

  34. F. E. Bertrand, R. W. Peelle andC. Kalbach Cline:Phys. Rev. C,10, 1028 (1974).

    Article  ADS  Google Scholar 

  35. F. Hermes, E. W. Jasper, H. E. Kurz andT. Mayer-Kuckuk:Nucl. Phys.,228 A, 165 (1974).

    Article  ADS  Google Scholar 

  36. J. J. Griffin:Phys. Rev. Lett.,17, 478 (1966).

    Article  ADS  Google Scholar 

  37. M. Blann:Phys. Rev. Lett.,21, 1357 (1968).

    Article  ADS  Google Scholar 

  38. F. C. Williams jr.:Phys. Lett.,31 B, 184 (1970).

    Article  ADS  Google Scholar 

  39. C. K. Cline andM. Blann:Nucl. Phys.,172 A, 225 (1969).

    ADS  Google Scholar 

  40. M. Blann:Phys. Rev. Lett.,27, 337 (1971);28, 757 (1972);Nucl. Phys.,215 A, 570 (1973).

    Article  ADS  Google Scholar 

  41. E. Gadioli:Lett. Nuovo Cimento,3, 515 (1972).

    Article  Google Scholar 

  42. M. G. Braga Marcazzan, E. Gadioli Erba, L. Milazzo Colli andP. G. Sona:Phys. Rev. C,6, 1398 (1972).

    Article  ADS  Google Scholar 

  43. C. Birattari, E. Gadioli, E. Gadioli Erba, A. M. Grassi Strini, G. Strini andG. Tagliaferri:Nucl. Phys.,201 A, 579 (1973).

    Article  ADS  Google Scholar 

  44. I. Ribanský, P. Obložinský andE. Běták:Nucl. Phys.,205 A, 545 (1973);226 A, 347 (1974).

    Article  ADS  Google Scholar 

  45. E. Gadioli, E. Gadioli Erba andP. G. Sona:Nucl. Phys.,217 A, 589 (1973).

    Article  ADS  Google Scholar 

  46. E. Gadioli andL. Milazzo Colli:Lecture Notes in Physics, Vol.22 (Berlin, Heidelberg and New York, N. Y., 1973), p. 84,M. Blann:Lecture Notes in Physics, Vol.22 (Berlin, Heidelberg and New York, N. Y., 1973), p. 43.

    Article  ADS  Google Scholar 

  47. T. Ericson:Adv. Phys.,9, 423 (1960).

    Article  ADS  Google Scholar 

  48. M. Böhning:Nucl. Phys.,152 A, 529 (1970).

    Article  ADS  Google Scholar 

  49. F. C. Williams jr.:Nucl. Phys.,133 A, 33 (1969);166 A, 231 (1971).

    Article  ADS  Google Scholar 

  50. E. Běták: contribution to theVII Summer School on Nuclear Physics, Poland, September 1974.

  51. F. C. Williams jr.,A. Mignerey andM. Blann:Nucl. Phys.,207 A, 619 (1973);K. Albrecht andM. Blann:Phys. Rev. C,8, 1418 (1973).

    Article  ADS  Google Scholar 

  52. M. Blann andA. Mignerey:Nucl. Phys.,186 A, 245 (1972).

    Article  ADS  Google Scholar 

  53. C. Kalbach Cline:Nucl. Phys.,193 A, 417 (1972).

    Article  ADS  Google Scholar 

  54. I. Ribanský, P. Obložinský andE. Běták:Proceedings of the Third International Seminar on Interactions of Fast Neutrons with Nuclei, Gaussig (Dresden), edited byG. Kiessig andR. Reif.

  55. C. Birattari, E. Gadioli, A. M. Grassi Strini, G. Strini andG. Tagliaferri:Lett. Nuovo Cimento,7, 101 (1973).

    Article  Google Scholar 

  56. E. Gadioli andE. Gadioli Erba:Acta Phys. Slov.,25, 126 (1975).

    Google Scholar 

  57. E. Běták:Acta Phys. Slov., to be published.

  58. H. A. Bethe:Phys. Rev.,57, 1125 (1940).

    Article  ADS  Google Scholar 

  59. S. Fernbach, R. Serber andB. T. Taylor:Phys. Rev.,75, 1352 (1949).

    Article  ADS  Google Scholar 

  60. N. F. Francis andK. M. Watson:Amer. Journ. Phys.,21, 659 (1953).

    Article  ADS  MATH  Google Scholar 

  61. E. Gadioli, E. Gadioli Erba andP. G. Sona:Lett. Nuovo Cimento,10, 373 (1974).

    Article  Google Scholar 

  62. B. L. Cohen, G. R. Rao, J. H. Degnan andC. K. Chan:Phys. Rev. C,7, 331 (1973).

    Article  ADS  Google Scholar 

  63. F. E. Bertrand andR. W. Peelle: Oak Ridge National Laboratory Report ORNL 4638, unpublished.

  64. K. Seidel: Dissertation B, Sektion Physik, Technische Universität Dresden, Haüptbibliothek.

  65. J. J. Griffin:Phys. Lett.,24 B, 5 (1967).

    Article  ADS  Google Scholar 

  66. L. Milazzo Colli andG. M. Braga Marcazan:Nucl. Phys.,210 A, 297 (1973);Riv. Nuovo Cimento,3, 535 (1973).

    Article  ADS  Google Scholar 

  67. R. Čaplar andP. Kulisic:Proceedings of the International Conference on Nuclear Physics held in Munich, September 1973, Vol.1, edited byJ. De Boer andH. J. Mang (Amsterdam, 1973).

  68. L. Głowacka, M. Jaskóła, M. Kozłowski, W. Osakiewicz, J. Turkiewicz andL. Zemło:Proceedings of the International Conference on Nuclear Physics, Vol.1 (Munich, 1973), p. 519.

    Google Scholar 

  69. E. Gadioli, A. M. Grassi Strini, G. Lo Bianco, G. Strini andG. Tagliaferri:Nuovo Cimento,22 A, 547 (1974).

    Article  ADS  Google Scholar 

  70. A. H. Wapstra andN. B. Gove:Nuclear Data Tables,9, No. 4 and 5 (1971).

  71. P. E. Nemirovski andYu. V. Adamchuck:Nucl. Phys.,39, 551 (1962).

    Article  Google Scholar 

  72. R. H. Huizenga andG. Igo:Nucl. Phys.,29, 462 (1962).

    Article  Google Scholar 

  73. E. Gadioli, I. Iori, N. Molho andL. Zetta:Nucl. Phys.,138 A, 321 (1969);Lett. Nuovo Cimento,3, 677 (1972);Nuovo Cimento,22 A, 398 (1974).

    Article  ADS  Google Scholar 

  74. N. T. Porile:Low energy nuclear reactions, inNuclear Chemistry, edited byL. Yaffe (New York, N. Y., 1968).

  75. G. S. Mani, M. A. Melkanoff andI. Iori: Report CEA 2379 (1963), unpublished.

  76. A. Lindner: Report IKF-17, EANDC (E) 73 « U » (1966), unpublished.

  77. P. Obložinský andI. Ribanský:Nucl. Phys.,195 A, 269 (1972);Acta Phys. Slov.,24, 103 (1974).

    Article  ADS  Google Scholar 

  78. J. Sau, A. Demeyer andR. Chery:Nucl. Phys.,121 A, 131 (1968).

    Article  ADS  Google Scholar 

  79. C. Kalbach Cline:Acta Phys. Slov.,25, 100 (1975).

    Google Scholar 

  80. F. N. Spiess:Phys. Rev.,94, 1292 (1954).

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Istituto di Scienze Fisiche dell’Università, Milano, Italia

    E. Gadioli, E. Gadioli Erba, L. Sajo-Bohus & G. Tagliaferri

  2. Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Italy

    E. Gadioli, E. Gadioli Erba, L. Sajo-Bohus & G. Tagliaferri

Authors
  1. E. Gadioli
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. E. Gadioli Erba
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. L. Sajo-Bohus
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. G. Tagliaferri
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Gadioli, E., Erba, E.G., Sajo-Bohus, L. et al. An exciton model approach to the analysis of α-particle-induced nuclear reactions. Riv. Nuovo Cim. 6, 1–38 (1976). https://doi.org/10.1007/BF02747729

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02747729

Search

Navigation