Zeitschrift für Physik A Hadrons and Nuclei

, Volume 354, Issue 3, pp 253–260 | Cite as

Pairing effects in Sn isotopes

  • F. Andreozzi
  • L. Coraggio
  • A. Covello
  • A. Gargano
  • A. Porrino


An extensive study of pairing effects in the Sn isotopes is carried out. The pairing Hamiltonian is treated by the chain-calculation method which provides practically exact solutions while involving less computational work than a complete-basis diagonalization. The coupling strength is fixed by reproducing the energy of the 9 state in116Sn, while the single-particle energies have been determined by an analysis of the experimental low-energy spectra of the odd-A isotopes. A detailed comparison of the calculated results with experimental data evidences the importance of neutron pairing correlations in the 50–82 shell. The results of this paper complement those of our previous study of theN=82 isotones. It turns out that the role of pairing correlations is similar to a large extent in both cases.


21.60.-n 27.60.+j 


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  1. 1.
    Andreozzi, F., Covello, A., Gargano, A., Liu Jian Ye, Porrino, A.: Phys. Rev. C32, 293 (1985)ADSGoogle Scholar
  2. 2.
    Covello, A., Andreozzi, F., Gargano, A., Porrino, A.: Phys. Scr. T32, 7 (1990)ADSCrossRefGoogle Scholar
  3. 3.
    Covello, A., Andreozzi, F., Gargano, A., Porrino, A.: Proceedings of the Third International Spring Seminar on Nuclear Physics 1990. Covello, A. (ed.), p. 71. Singapore: World Scientific 1991Google Scholar
  4. 4.
    Covello, A., Andreozzi, F., Gargano, A., Porrino, A.: Proceedings of the Predeal International Summer School 1991. Raduta, A.A., Delion D.S., Ursu, I.I. (eds.), p. 2. Singapore: World Scientific 1992Google Scholar
  5. 5.
    Andreozzi, F., Covello, A., Gargano, A., Porrino, A.: Phys. Rev.C41, 250 (1990)ADSGoogle Scholar
  6. 6.
    Andreozzi, F., Covello, A., Gargano, A., Porrino, A.: Phys. Rev.C45, 2008 (1992)ADSGoogle Scholar
  7. 7.
    Bonsignori, G., Savoia, M., Allaart, K., Van Egmond, A., te Velde, G.: Nucl. Phys.A432, 389 (1985), and references thereinADSCrossRefGoogle Scholar
  8. 8.
    Leander, G.A., Dudek, J., Nazarewicz, W., Nix, J.R., Quentin, Ph.: Phys. Rev.C30, 416 (1984)ADSGoogle Scholar
  9. 9.
    Schneid, E.J., Prakash A., Cohen, B.L.: Phys. Rev.156, 1316 (1967)ADSCrossRefGoogle Scholar
  10. 10.
    Fleming, D.G.: Can. J. Phys.60, 428 (1982); a comprehensive list of earlier references can be found thereADSCrossRefGoogle Scholar
  11. 11.
    Bron, J., Hesselink, W.H.A., van Poelgeest, A., Zalmstra, J.J.A., Uitzinger, M.J., Verheul, H., Heyde, K., Waroquier, M., Vincx, H., van Isacker, P.: Nucl. Phys. A318, 335 (1979)ADSCrossRefGoogle Scholar
  12. 12.
    De Frenne, D., Jacobs, E.: Nucl. Data Sheets72, 1 (1994)ADSCrossRefGoogle Scholar
  13. 13.
    Blachot, J.: Nucl. Data Sheets62, 803 (1991)ADSCrossRefGoogle Scholar
  14. 14.
    De Frenne, D., Jacobs, E.: Nucl. Data Sheets67, 809 (1992)ADSCrossRefGoogle Scholar
  15. 15.
    De Frenne, D., Jacobs, E., Verboven, M.: Nucl. Data Sheets57, 443 (1989)ADSCrossRefGoogle Scholar
  16. 16.
    Blachot, J., Marguier, G.: Nucl. Data Sheets60, 139 (1990)ADSCrossRefGoogle Scholar
  17. 17.
    Blachot, J., Marguier, G.: Nucl. Data Sheets59, 333 (1990)ADSCrossRefGoogle Scholar
  18. 18.
    Tamura, T., Miyano, K., Ohya, S.: Nucl. Data Sheets51, 329 (1987)ADSCrossRefGoogle Scholar
  19. 19.
    Lunardi, S., Daly, P.J., Soramel, F., Signorini, C., Fornal, B., Fortuna, G., Stefanini, A.M., Broda, R., Meczynski, W., Blomqvist, J.: Z. Phys. A328, 487 (1987)ADSGoogle Scholar
  20. 20.
    Kitao, K., Kanbe, M., Matsumoto, Z., Seo, T.: Nucl. Data Sheets49, 315 (1986)ADSCrossRefGoogle Scholar
  21. 21.
    Tamura, T.: Nucl. Data Sheets71, 461 (1994)ADSCrossRefGoogle Scholar
  22. 22.
    Broda, R., Mayer, R.H., Bearden, I.G., Benet, Ph., Daly, P.J., Grabowski, Z.W., Carpenter, M.P., Janssens, R.V.F., Khoo, T.L., Lauritsen, T., Moore, E.F., Lunardi, S., Blomqvist, J.: Phys. Rev. Lett.68, 1671 (1992)ADSCrossRefGoogle Scholar
  23. 23.
    Broda. R.: (private communication)Google Scholar
  24. 24.
    Fogelberg, B., Heyde, K., Sau, J.: Nucl. Phys. A352, 157 (1981)ADSCrossRefGoogle Scholar
  25. 25.
    Sergeenkov, Yu. V.: Nucl. Data Sheets58, 765 (1989)ADSCrossRefGoogle Scholar
  26. 26.
    Blachot, J.: Nucl. Data Sheets62, 709 (1991)ADSCrossRefGoogle Scholar
  27. 27.
    Ishii, T., Makishima, A., Koganemaru, K., Saito, Y., Ogawa, M., Ishii, M.: Z. Phys. A347 41 (1993)ADSGoogle Scholar
  28. 28.
    Blachot, J.: Nucl. Data Sheets64, 913 (1991)ADSCrossRefGoogle Scholar
  29. 29.
    Blachot, J., Haas, F.: Nucl. Data Sheets60, 889 (1990)ADSCrossRefGoogle Scholar
  30. 30.
    Blachot, J.: Nucl. Data Sheets59, 729 (1990)ADSCrossRefGoogle Scholar
  31. 31.
    Blachot, J., Marguier, G.: Nucl. Data Sheets67, 1 (1992)ADSCrossRefGoogle Scholar
  32. 32.
    Blachot, J., Marguier, G.: Nucl. Data Sheets66, 451 (1992)ADSCrossRefGoogle Scholar
  33. 33.
    Kitao, K., Kanbe, M., Ogawa, K.: Nucl. Data Sheets67, 327 (1992)ADSCrossRefGoogle Scholar
  34. 34.
    Tamura, T., Iimura, H., Miyano, K., Ohya, S.: Nucl. Data Sheets64, 323 (1991)ADSCrossRefGoogle Scholar
  35. 35.
    Ohya S., Tamura, T.: Nucl. Data Sheets70, 531 (1993)ADSCrossRefGoogle Scholar
  36. 36.
    Katakura, K., Oshima, M., Kitao, K., Iimura, H.: Nucl. Data Sheets70, 217 (1993)ADSCrossRefGoogle Scholar
  37. 37.
    Hashizume, A., Tendow, Y., Kitao, K., Kanbe, M., Tamura, T.: Nucl. Data Sheets35, 181 (1982)ADSCrossRefGoogle Scholar
  38. 38.
    Hashizume, A., Tendow, Y., Ohshima, M.: Nucl. Data Sheets39, 551 (1983)ADSCrossRefGoogle Scholar
  39. 39.
    De Geer, L.-E., Holm, G.B.: Phys. Rev. C22, 2163 (1980)ADSGoogle Scholar
  40. 40.
    Eberz, J., Dinger, U., Huber, G., Lochmann, H., Menges, R., Ulm, G., Kirchner, R., Klepper, O., Kühl, T.U., Marx, D.: Z. Phys. A326, 121 (1987)ADSGoogle Scholar
  41. 41.
    Hogervorst, W., Ekström, C., Ingelman, S., Wannberg, G.: Phys. Scr.9, 317 (1974)ADSCrossRefGoogle Scholar
  42. 42.
    Auger, G., Lagrange, J.M., Pautrat, M., Vanhorenbeeck, J.: Nucl. Phys. A426, 109 (1984)ADSCrossRefGoogle Scholar
  43. 43.
    Wigmans, M.E.J., Heynis, R.J., van der Kam, P.M.A., Verheul, H.: Phys. Rev C14, 229 (1976)ADSGoogle Scholar
  44. 44.
    Baedecker, P.A., Pakkanen, A., Walters, W.B.: Nucl. Phys. A158, 607 (1970)ADSCrossRefGoogle Scholar
  45. 45.
    Fogelberg, B., De Geer, L.-E., Fransson, K., af Ugglas, M.: Z. Phys. A276, 381 (1976)ADSCrossRefGoogle Scholar
  46. 46.
    Blankert, P.J., Blok, H.P., Blok, J.: Nucl. Phys. A356, 74 (1981)ADSCrossRefGoogle Scholar
  47. 47.
    Lyttkens, J.L., Nilson, K., Ekström, L.P.: Nucl. Data Sheets33, 1 (1981)ADSCrossRefGoogle Scholar
  48. 48.
    Blachot, J., Marguier, G.: Nucl. Data Sheets52, 565 (1987)ADSCrossRefGoogle Scholar
  49. 49.
    Blachot, J., Marguier, G.: Nucl. Data Sheets50, 63 (1987)ADSCrossRefGoogle Scholar
  50. 50.
    Gerlic, E., Berrier-Ronsin, G., Duhamel, G., Galès, S., Hourani, E., Langevin-Joliot, H., Vergnes, M., Van de Wiele, J.: Phys. Rev. C21, 124 (1980)ADSGoogle Scholar
  51. 51.
    Carson, P.L., McIntyre, L.C. Jr.,: Nucl. Phys. A198, 289 (1972)ADSCrossRefGoogle Scholar

Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • F. Andreozzi
    • 1
  • L. Coraggio
    • 1
  • A. Covello
    • 1
  • A. Gargano
    • 1
  • A. Porrino
    • 1
  1. 1.Dipartimento di Scienze FisicheUniversità di Napoli Federico II, and Istituto Nazionale di Fisica Nucleare, Mostra d’OltremareNapoliItaly

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