Advertisement

Background Calculations for (p,n)-Reactions at Intermediate Energies

  • Franz Osterfeld

Abstract

The background of 40Ca(p,n)- and 48Ca(p,n)-spectra have been calculated in a microscopic model for an incident proton energy of 160 MeV. The continuous parts of the spectra are reproduced within a factor of 1.3. It is shown that most of the background subtracted in the experimental analysis of the 48Ca(p,n)-Gamow-Teller resonance is actually Gamow-Teller strength. The calculations predict a strong ΔL=2(3+)-resonance in 48Ca(p,n) at 25 MeV excitation energy, but none in 40Ca.

Keywords

Random Phase Approximation Intermediate Energy Giant Resonance High Excitation Energy Neutron Excess 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    For reviews on the experimental and theoretical situation of giant resonances see for example: F.E. Bertrand, Ann. Rev. Nucl. Sci. 26:457 (1976)ADSCrossRefGoogle Scholar
  2. 1a.
    G.R. Satchler, Proc. Int. School of Physics Enrico Fermi, LXIX Corso, Varenna (1976)Google Scholar
  3. 1b.
    J. Speth and A. van der Woude, Rep. Prog. Phys. 44:719 (1981).ADSCrossRefGoogle Scholar
  4. 2.
    G.F. Bertsch and S.F. Tsai, Phys. Rep. 18C:125 (1975)ADSCrossRefGoogle Scholar
  5. 2a.
    S.F. Tsai and G.F. Bertsch, Phys. Rev. C11:1634 (1975)ADSGoogle Scholar
  6. 2b.
    S.F. Tsai and G.F. Bertsch, Phys. Lett. 73B:248 (1978).ADSGoogle Scholar
  7. 3.
    T. Tamura, T. Udagawa, D.H. Feng and K.K. Kan, Phys. Lett. 66B: 109 (1977)ADSGoogle Scholar
  8. 3a.
    T. Tamura and T. Udagawa, Phys. Lett. 78B:189 (1978)ADSGoogle Scholar
  9. 3b.
    T. Tamura and T. Udagawa, Proc. 1980 RCNP Int. Symp. on “Highly Excited States in Nuclear Reactions”, Osaka University (1980) p. 33.Google Scholar
  10. 4.
    F.E. Bertrand and R.W. Peelle, Phys. Rev. C8:1045 (1973)ADSGoogle Scholar
  11. 4a.
    F.E. Bertrand and R.W. Peelle, Oak Ridge National Lab. Report ORNL-4638 (1971).Google Scholar
  12. 5.
    H. Feshbach, A.K. Kerman, S. Koonin, Ann. Phys. 125:429 (1980)MathSciNetADSCrossRefGoogle Scholar
  13. 5a.
    H. Feshbach, A.K. Kerman, S. Koonin, Proc. 1980 RCNP Int. Symp. on “Highly Excited States in Nuclear Reactions”, Osaka University (1980), p. 5.Google Scholar
  14. 6.
    L. Avaldi, R. Bennetti and L. Colli-Milazzo, to be published.Google Scholar
  15. 7.
    B.D. Anderson, J.N. Knudson, P.C. Tandy, J.W. Watson and R. Madey, Phys. Rev. Lett. 45:699 (1980).ADSCrossRefGoogle Scholar
  16. 8.
    C. Gaarde, J.S. Larsen, C.D. Goodman, C.C. Foster, C.A. Goulding, D.J. Horen, T. Masterson, E. Sugarbaker, preprint; C. Gaarde, Trieste-Lectures, to be published (1981).Google Scholar
  17. 9.
    R.R. Doering, A. Galonsky, D. Patterson, G.F. Bertsch, Phys. Rev. Lett. 35:1961 (1975).CrossRefGoogle Scholar
  18. 10.
    D.E. Bainum, J. Rapaport, C.D. Goodman, D.J. Horen, C.C Foster, M.B. Greenfield and C.A. Goulding, Phys. Rev. Lett. 44:1751 (1980).ADSCrossRefGoogle Scholar
  19. 11.
    C.D. Goodman, C.A. Goulding, M.B. Greenfield, J. Rapaport, D.E. Bainum, C.C. Foster, W.G. Love and F. Petrovich, Phys. Rev. Lett. 44:1755 (1980).ADSCrossRefGoogle Scholar
  20. 12.
    D.J. Horen, C.D. Goodman, C.C. Foster, C.A. Goulding, M.B. Greenfield, J. Rapaport, E. Sugarbaker, T.G. Masterson, F. Petrovich and W.G. Love, Phys. Lett. 95B:27 (1980)ADSGoogle Scholar
  21. 12a.
    D.J. Horen, C.D. Goodman, D.E. Bainum, C.C. Foster, C. Gaarde, C.A. Goulding, M.B. Greenfield, J. Rapaport, T.N. Taddeucci, E. Sugarbaker, T. Masterson, S.M. Austin, A. Galonsky, W. Sterrenburg, Phys. Lett. 99B:383 (1981).ADSGoogle Scholar
  22. 13.
    C Gaarde, J. Rapaport, T.N. Taddeucci, C.D. Goodman, C.C. Foster, D.E. Bainum, C.A. Goulding, M.B. Greenfield, D.J. Horen and E. Sugarbaker, Nucl. Phys. A369:258 (1981).ADSGoogle Scholar
  23. 14.
    K.I. Ikeda, S. Fujii and J.I. Fujita, Phys. Lett. 3:271 (1963).ADSCrossRefGoogle Scholar
  24. 15.
    M. Rho, Nucl. Phys. A231:493 (1974)ADSGoogle Scholar
  25. 15a.
    K. Ohta and M. Wakamatsu, Nucl. Phys. A234-.445 (1974)ADSGoogle Scholar
  26. 15b.
    J. Delorme, M. Ericson, A. Figureau and C. Thévenet, Ann. Phys. 102:273 (1976)ADSCrossRefGoogle Scholar
  27. 15c.
    E. Oset and M. Rho, Phys. Rev. Lett. 42:42 (1979)ADSCrossRefGoogle Scholar
  28. 15d.
    I.S. Towner and F.C Khanna, Phys. Rev. Lett, 42:51 (1979)ADSCrossRefGoogle Scholar
  29. 15e.
    W. Knüpfer, M. Dillig and A. Richter, Phys. Lett. 95B:349 (1980)ADSGoogle Scholar
  30. 15f.
    A. Härting, W. Weise, H. Toki and A. Richter, Phys. Lett. 104B: 261 (1981)ADSGoogle Scholar
  31. 15g.
    H. Toki and W. Weise, Phys. Lett. 97B:12 (1980)ADSGoogle Scholar
  32. 15h.
    S. Krewald, F. Osterfeld, J. Speth and G.E. Brown, Phys. Rev. Lett. 46:103 (1981)ADSCrossRefGoogle Scholar
  33. 15i.
    A. Bohr and B.R. Mottelson, Phys. Lett. 100B:10 (1981)ADSGoogle Scholar
  34. 15j.
    G.E. Brown and M. Rho, Nucl. Phys. A327:397 (1981)ADSGoogle Scholar
  35. 15k.
    T. Suzuki, S. Krewald, J. Speth, Phys. Lett. 107B:9 (1981).ADSGoogle Scholar
  36. 16.
    F. Osterfeld, S. Krewald, J. Speth, T. Suzuki, Phys. Rev. Lett. 49:11 (1982).ADSCrossRefGoogle Scholar
  37. 17.
    W.G. Love and M.A. Franey, Phys. Rev. C24:1073 (1981)ADSGoogle Scholar
  38. 17a.
    F. Petrovich, W.G. Love, Nucl. Phys. A354:499c (1981).ADSGoogle Scholar
  39. 18.
    F. Becchetti and G.W. Greenlees, Phys. Rev. 182:1190 (1969).ADSCrossRefGoogle Scholar
  40. 19.
    F. Osterfeld, FROST-MARS-CODE, unpublished.Google Scholar
  41. 20.
    J. Speth, V. Klemt, J. Wambach and G.E. Brown, Nucl. Phys. A343:282 (1980).Google Scholar
  42. 21.
    F. Osterfeld, S. Krewald, H. Dermawan and J. Speth, Phys. Lett. 105B:257 (1981).ADSGoogle Scholar
  43. 22.
    J. Speth, S. Krewald, F. Osterfeld, and T. Suzuki, these proceedings.Google Scholar
  44. 23.
    C. Gaarde, J. Rapaport, private communication.Google Scholar
  45. 24.
    N. Anantaraman, G.M. Crawley, A. Galonsky, C. Djalali, N. Marty, M. Morlet, A. Willis and J.-C. Jourdain, Phys. Rev. Lett. 46:1318 (1981).ADSCrossRefGoogle Scholar
  46. 25.
    A. Nadasen, P. Schwandt, P.P. Singh, W.W. Jacobs, A.D. Bacher, P.T. Debevec, M.D. Kaitchuck and J.T. Meek, Phys. Rev. C23:1023 (1981).ADSGoogle Scholar

Copyright information

© Plenum Press, New York 1984

Authors and Affiliations

  • Franz Osterfeld
    • 1
  1. 1.Institut für KernphysikKernforschungsanlage JülichJülichWest Germany

Personalised recommendations