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Direct and Resonance Capture Reactions with Nucleons and Composite Particles

  • Kurt A. Snover

Abstract

What I’d like to do in this paper is primarily to discuss radiative proton capture measurements and direct-semidirect model calculations in both light and heavy nuclei. These are measurements in the giant-resonance region, and are of interest primarily in the degree to which they provide information on giant-quadrupole resonances, and on details of the giant-dipole resonance. Of course, in order to extract giant resonance information from radiative capture, one must first understand the reaction mechanism. To this end, I’ve made extensive investigations of the usefulness of the Direct-Semidirect (DSD) model,1 and I’d like to illustrate for you both its spectacular successes and puzzling failures. I have a few brief comments to make about a-capture in light nuclei, and on neutron capture. Finally I’d like to discuss some exciting recent results on magnetic-dipole strength in the doubly-magic 160 nucleus. Although most of what I’ll talk about generally falls-outside of what one generally calls “neutron physics”, it appropriately falls under the “Related Topics” section of this conference since much of this work bears significantly on fast-neutron capture physics, particularly the DSD calculations. Also, since I hope to present a discussion of rather wide scope (I hesitate to call it a review to avoid offending those whose work I fail to mention) I have taken the liberty of including some previously published work.

Keywords

Light Nucleus Radiative Capture Isobaric Analog Resonance Direct Capture Proton Capture 
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.

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References

  1. 1.
    G.E. Brown, Nucl. Phys. 57 (1964) 339; C.F. Clement, A.M. Lane and J.A. Rook, Nucl. Phys. 66 (1965) 273 and 293.CrossRefGoogle Scholar
  2. 2.
    S.S. Hanna, H.F. Glavish, R. Avida, J.R. Calarco, E. Kuhlman and R. LaCanna, Phys. Rev. Lett. 32 (1974) 114.ADSCrossRefGoogle Scholar
  3. 3.
    K.A. Snover, J.E. Bussoletti, K. Ebisawa, T.A. Trainor and A.B. McDonald, Phys. Rev. Lett. 37 (1976) 273.ADSCrossRefGoogle Scholar
  4. 4.
    B.M. Skwiersky, C.M. Baglin and P.D. Parker. Phys. Rev. C9 (1974) 910.ADSGoogle Scholar
  5. 5.
    B.A. Watson, P.P. Singh and R.E. Segel, Phys. Rev. 182 (1969) 977.ADSCrossRefGoogle Scholar
  6. 6.
    F.D. Becchetti and G.W. Greenless, Phys. Rev. 182 (1969) 1190.ADSCrossRefGoogle Scholar
  7. 7.
    M.H. Harakeh, P. Paul, H.M. Kuan and E.K. Warburton, Phys. Rev. C12 (1975) 1410.ADSGoogle Scholar
  8. 8.
    See e.g. K.T. Knöpfle, G.J. Wagner, H. Breuer, M. Rogge and C. Mayer-Böricke, Phys. Rev. Lett. 35 (1975) 779.ADSCrossRefGoogle Scholar
  9. J.E. Bussoletti, Ph.D. Thesis, University of Washington, 1978; K.A. Snover, J.E. Bussoletti et al., to be publisherd.Google Scholar
  10. 10.
    W.J. O’Connell, Ph.D. Thesis, Stanford University, 1969.Google Scholar
  11. 11.
    K.T. Knöpfle, G.J. Wagner, P. Paul, H. Breuer, C. Mayer-Böricke, M. Rogge and P. Turek, Phys. Lett. 74B (1978) 191.ADSGoogle Scholar
  12. 12.
    H. Riedesel, K.T. Knöpfle, H. Breuer, P. Doll. G. Mairle and G.J. Wagner, Phys. Rev. Lett. 41 (1978) 377.ADSCrossRefGoogle Scholar
  13. 13.
    K.A. Snover, E.G. Adelberger and D.R. Brown, Phys. Rev. Lett. 321 (1974) 1061.ADSCrossRefGoogle Scholar
  14. 14.
    J.S. Dehesa, S. Krewald, J. Speth and A. Faessler, Phys. Rev. C15 (1977) 1858.ADSGoogle Scholar
  15. 15.
    P. Paul, Proceedings of the Internat. Symp. on Highly Excited States in Nuclei, Jülich, 1975 (A. Faessler, ed.) Vol 2, p 72.Google Scholar
  16. 16.
    D.G. Mavis, Ph.D. Thesis, Stanford University, 1977.Google Scholar
  17. 17.
    C. Rolfs, Nucl. Phys. A217 (1973) 29.ADSGoogle Scholar
  18. 18.
    R.G. Helmer et al., to be published.Google Scholar
  19. 19.
    J.R. Calarco, S.W. Wissink, M. Sasao, K. Weinhard and S.S. Hanna, Phys. Rev. Lett. 39 (1977) 925.ADSCrossRefGoogle Scholar
  20. 20.
    F.S. Dietrich, D.W. Heikkinen, K.A. Snover and K. Ebisawa, Phys. Rev. Lett. 38 (1977) 156.ADSCrossRefGoogle Scholar
  21. 21.
    M. Hasinoff, G.A. Fisher and S.S. Hanna, Nucl. Phys. A216 (1973) 221.ADSGoogle Scholar
  22. 22.
    S. Fukuda and Y. Torizuka, Phys. Lett. 62B (1976) 146.ADSGoogle Scholar
  23. 23.
    M. Potokar, Phys. Lett. 46B (1973) 346.ADSGoogle Scholar
  24. 24.
    F.S. Dietrich et al., to be published.Google Scholar
  25. 25.
    K.A. Snover, J.F. Amann, W. Hering and P. Paul, Phys. Lett. 37B (1971) 29.ADSGoogle Scholar
  26. 26.
    K.A. Snover, K. Ebisawa, D.R. Brown and P. Paul, Phys. Rev. Lett. 32 (1974) 317; K. Ebisawa, Ph.D. Thesis, University of Washington, 1978.ADSCrossRefGoogle Scholar
  27. 27.
    F.S. Dietrich and A.K. Kerman, contributed paper at this conference, and private communication.Google Scholar
  28. 28.
    See, e.g. F. Saporetti, G. Longo and R. Guidotti, Phys. Lett. 76B (1978) 15.ADSGoogle Scholar
  29. 29.
    N.R. Roberson, M. Potokar, D.R. Tilley, S.A. Wender and H.R. Weiler, contributed paper at this conference.Google Scholar
  30. 30.
    K.A. Snover, P.G. Ikossi and T.A. Trainor, to be published.Google Scholar
  31. 31.
    F. Ajzenberg-Selove, Nucl. Phys. A281 (1977) 1.ADSGoogle Scholar
  32. 32.
    M. Stroetzel and G. Goldmann, Z. Phys. 214 (1968) 357.ADSCrossRefGoogle Scholar
  33. 33.
    G.E. Brown and A.M. Green, Nucl. Phys. 75 (1966) 401.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

  • Kurt A. Snover
    • 1
  1. 1.University of WashingtonSeattleUSA

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