Zeitschrift für Physik A Hadrons and Nuclei

, Volume 357, Issue 3, pp 303–316 | Cite as

Quasielastic transfer reactions in 238U + 197Au and 197Au + 197Au collisions near the Coulomb barrier

  • E. Funke
  • G. Wirth
  • J. V. Kratz
  • W. Brüchle
  • Fan Wo
  • K. Sümmerer


Differential cross sections as a function of cm angle were measured for 1n- and 2n-transfer reactions in 238U + 197 Au and197 Au + 197 Au collisions in the energy range from 0.881 Vc to 1.093 Vc and 0.825 Vc to 0.964 Vc, respectively. For 198Au and 199Au from the 238U + 197Au collisions, for reduced distances of closest approach d o 1.55 fm, the angular distributions at all bombarding energies are well described by the semiclassical theory. Equivalently, the transfer probabilities show the expected exponential decrease with increasing d o over many orders of magnitude. For all other transfer products from 238U + 197Au collisions, and for all transfer products from 197Au + 197Au collisions, markedly reduced cross sections relative to the semiclassical theory are observed for central collisions at all bombarding energies, even for values of d o that are well outside the region where absorption is known to set in. Only for the more peripheral collisions, one observes agreement of the angular distributions (transfer probabilities) with the semiclassical expectations. The deviations for central collisions are absent for reactions with positive Q gg values and scale roughly with increasingly negative values of Q gg, i.e. with increasing Q-value mismatch. Channel coupling is proposed as the relevant mechanism.


25.70.Bc 25.70.Hi 


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  1. 1.
    Wirth, G., Brüchle, W, Brügger, M., Fan Wo, Sümmerer, K., Funke, F., Kratz, J.V., Lerch, M., Trautmann, N.: Phys. Lett. B177, 282 (1986).ADSCrossRefGoogle Scholar
  2. 2.
    Wirth, G., Brüchle, W., Fan Wo, Sümmerer, K., Funke, F., Kratz, J.V., Trautmann, N., Oberacker, V.E.: Z. Phys. A330, 87 (1988).ADSGoogle Scholar
  3. 3.
    Wirth, G., Brüchle, W., Fan Wo, Sümmerer, K., Funke, F., Kratz, J.V., Trautmann, N.: Phys. Lett. B253, 28 (1991).ADSCrossRefGoogle Scholar
  4. 4.
    Funke, F., Kratz, J.V., Trautmann, N., Wiehl, N., Wirth, G., Brüchle, G., Fan Wo, Sümmerer, K.: Z. Phys. A340, 303 (1991).ADSGoogle Scholar
  5. 5.
    Schweppe, J., Gruppe, A., Bethge, K. Bokemeyer, H., Cowan, T., Folger, H., Greenberg, J.S., Grein, H., Ito, S., Schule, R., Schwalm, D., Stiebing, K.E., Trautmann, N., Vincent, R, Waldschmidt, M.: Phys. Rev. Lett. 51, 2261 (1983).ADSCrossRefGoogle Scholar
  6. 6.
    Clemente, M., Berdermann, E., Kienle, R, Tsertos, H., Wagner, W, Kozhuharov, C., Bosch, F., Koenig, W: Phys. Lett. B137, 41 (1984).ADSCrossRefGoogle Scholar
  7. 7.
    Reinhardt, J., Müller, B., Greiner, W.: Z. Phys. A303, 173 (1981).ADSCrossRefGoogle Scholar
  8. 8.
    Müller, U., Soff, G., Reus, T. de, Reinhardt, J., Müller, B., Greiner, W: Z. Phys. 313, 263 (1983).ADSCrossRefGoogle Scholar
  9. 9.
    Greiner, W. (ed.): Contributions in: Physics of strong fields, New York: Plenum Press 1987Google Scholar
  10. 10.
    Rhoades-Brown, M.J., Oberacker, V.E., Seiwert, M., Greiner, W: Z. Phys. A310, 287 (1983); Seiwert, M., Greiner, W, Oberacker, V.E., Rhoades-Brown, M.J.: Phys. Rev. C29, 477 (1984); Ismail, M., Rhashdan, M., Faessler, A., Trefz, M., Mansour, H.M.M.: Z. Phys. A323, 399 (1986); Katoot, M.W., Oberacker, V.E.: J. Phys. G15, 333 (1989); Berger, J.F., Anderson, J.D., Bonche, P., Weiss, M.S.: Phys. Rev. C41, R2483 (1990).ADSCrossRefGoogle Scholar
  11. 11.
    Russell, D.P., Pinkston, W.T., Oberacker, V.E.: Phys. Lett. B158, 201 (1985).ADSCrossRefGoogle Scholar
  12. 12.
    Bass, R.: Nuclear Reactions with Heavy Ions, p. 183, Berlin: Springer 1980Google Scholar
  13. 13.
    Wuosmaa, A.H., Rehm, K.E., Glagola, B.G., Happ, Th., Kutschera, W., Wolfs, F.L.H.: Phys. Lett. 255B, 316 (1991).ADSCrossRefGoogle Scholar
  14. 14.
    Wu, C.Y., Liu, X.T., Kernan, WJ., Cline, D., Czosnyka, T., Guidry, M.W., Kavka, A.E., Kincaid, R.W., Kotlinski, B., Sorensen, S.P., Vogt, E.: Phys. Rev. C39, 298 (1989).ADSGoogle Scholar
  15. 15.
    Sapotta, K., Bass, R., Hartmann, V, Noll, H., Renfordt, R.E., Stelzer, K.: Phys. Rev. C31, 1297 (1985).ADSGoogle Scholar
  16. 16.
    von Oertzen, W.: “Transfer of Nucleons between Nuclei”, in “Nuclear Collisions from the Mean-Field into the Fragmentation Regime”, 1991 CXII Corso, Soc. Italiana di Fisica, Bologna, Italy, p. 459Google Scholar
  17. 17.
    Rehm, K.E.: Annu. Rev. Nucl. Part. Sci. 41, 429 (1991).ADSCrossRefGoogle Scholar
  18. 18.
    Von Oertzen, W., Bohlen, H.G., Gebauer, B., Künkel, R., Pühlhofer, F., Schüll, D.: Z. Phys. A326, 463 (1987); Künkel, R., von Oertzen, W., Bohlen, H.G., Gebauer, B., Bösser, H.A., Kohlmeyer, B., Pühlhofer, F., Speer, J., Schüll, D.: Z. Phys. A336, 71 (1990).ADSGoogle Scholar
  19. 19.
    Funke, F.: Doctoral thesis, Universität Mainz (1990), Report GSI-90-10 (1990).Google Scholar
  20. 20.
    Gunnink, R., Niday, J.B.: Report UCRL-51061 (1971).Google Scholar
  21. 21.
    Westmeier, W, Reus, U., Warnecke, I.: At. Data Nucl. Data Tables 29, (2) (1983).Google Scholar
  22. 22.
    Pieper, S.C., Macfarlane, M.H.: Code PTOLEMY, Argonne National Laboratory, 1978Google Scholar
  23. 23.
    Fuller, G.H., Cohen, VW.: Nucl. Data Tables A5, 433 (1968); Löbner, K.E.G., Vetter, M., Hönig, V: Nucl. Data Tables A7, 495 (1970).ADSGoogle Scholar
  24. 24.
    Gupta, R.K., Maass, R., Scheid, W.: Phys. Rev. C37, 1502 (1988).ADSGoogle Scholar
  25. 25.
    Landowne, S., Pollarolo, G.: Phys. Lett. B241, 313 (1990).ADSCrossRefGoogle Scholar
  26. 26.
    Pinkston, W.T., Katoot, M.W., Oberacker, VE.: In: Physics of strong fields. Greiner, W (ed.) New York: Plenum Press 1987Google Scholar
  27. 27.
    Thompson, I.J., Nagarajan, M.A., Lilley, J.S., Fulton, B.R.: Nucl. Phys. A487, 141 (1988); Lilley, J.S., Nagarajan, M.A., Banes, D.W., Fulton, B.R., Thompson, I.J.: Nucl. Phys. A463, 710 (1987).ADSCrossRefGoogle Scholar
  28. 28.
    Reisdorf, W.: J. Phys. G: Nucl. Part. Phys. 20, 1297 (1994).ADSCrossRefGoogle Scholar

Copyright information

© Springer-Verlag 1997

Authors and Affiliations

  • E. Funke
    • 1
  • G. Wirth
    • 2
  • J. V. Kratz
    • 1
  • W. Brüchle
    • 2
  • Fan Wo
    • 2
  • K. Sümmerer
    • 2
  1. 1.Institut für KernchemieUniversität MainzMainzGermany
  2. 2.Gesellschaft für SchwerionenforschungDarmstadtGermany

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