Abstract
Evaporation residue excitation functions and statisticalγ-ray spectra have been measured in the heavy ion fusion reaction16O+144Nd →160Er betweenE Lab=76 and 105 MeV. In agreement with statistical model calculations, the evolution of theγ-ray spectra as a function of the compound nucleus excitation energy is consistent with the emission of high-energyγ rays (Eγ>10 MeV) in the early stage of the decay process. The description of the evaporation residue distributions by the statistical model is improved if aγ strength function including a giant dipole resonance built on each excited state and describing the shape of the measured statisticalγ-ray spectra is used in the calculations. The present analysis shows, however, that there is a strong correlation between the parameters of the resonance deduced from the fit to theγ-ray spectra and other parameters of the statistical model, in particular the level density parameter.
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Newton, J.O., Herskind, B., Diamond, R.M., Dines, E.L., Draper, J.E., Lindenberger, K.H., Schück, C., Shih, S., Stephens, F.S.: Phys. Rev. Lett.46, 1383 (1981)
Draper, J.E., Newton, J.O., Sobotka, L.G., Lindenberger, H., Wozniak, G.J., Moretto, L.G., Stephens, F.S., Diamond, R.M., McDonald, R.J.: Phys. Rev. Lett.49, 434 (1982)
Sandorfi, A.M., Barrette, J., Collins, M.T., Hoffman, D.H., Kreiner, A.J., Branford, D., Steadman, S.G., Wiggins, J.: Phys. Lett.130B, 19 (1983)
Hennerici, W., Metag, V., Hennrich, HJ., Repnow, R., Wahl, W., Habs, D., Helmer, K., Helmolt, U.V., Heyng, H.W., Kolb, B., Simon, R.S., Albrecht, R.: Nucl. Phys. A396, 329c (1983)
Garman, E.F., Snover, K.A., Chew, S.H., Hesmondhalgh, S.K.B., Catford, W.N., Walker, P.M.: Phys. Rev. C28, 2554 (1983)
Gaardhøje, J.J., Ellegaard, C., Herskind, B., Steadman, S.G.: Phys. Rev. Lett.53, 148 (1984)
Gossett, C.A., Snover, K.A., Behr, J.A., Feldman, G., Osborne, J.L.: Phys. Rev. Lett.54, 1486 (1985)
Haas, B., Radford, D.C., Beck, F.A., Byrski, T., Gehringer, C., Merdinger, J.C., Nourredine, A., Schutz, Y., Vivien, J.P.: Phys. Lett.120B, 79 (1982)
Gaardhøje, J.J., Andersen, O., Diamond, R.M., Ellegaard, C., Grodzins, L., Herskind, B., Sujkowski, Z., Walker, P.M.: Phys. Lett.139B, 273 (1984)
Lazzarini, A., Habs, D., Hennerici, W., Kroth, R., Schirmer, J., Metag, V.: Phys. Rev. Lett.53, 1045 (1984)
Arctaedius, Th., Bargholtz, Chr., Ekström, R.E., Fransson, K., Ritzen, B., Tegner, P.E.: Phys. Lett.158B, 205 (1985)
Hass, B., Duchêne, G., Beck, F.A., Byrski, T., Gehringer, C., Merdinger, J.C., Nourredine, A., Rauch, V., Vivien, J.P., Barrette, J., Tobbeche, S., Bozek, E., Styczen, J., Keinonen, J., Dudek, J., Nazarewicz, W.: Phys. Rev. Lett.54, 398 (1985)
Nolan, P.J., Love, D.J.G., Kirwan, A., Unwin, D.J., Nelson, A.H., Twin, P.J., Garrett, J.D.: Phys. Rev. Lett.54, 2211 (1985)
Pühlhofer, F.: Nucl. Phys. A280, 287 (1977)
Barrette, J., Sandorfi, A.M.: Comm. Nucl. Part. Phys.12, 57 (1983)
Gaardhøje, J.J.: In: Nuclear structure 1985. Broglia, R., Hageman, G.B., Herskind, B. (eds.), p. 519. Amsterdam, Oxford, New York: Elsevier Science Publishers
Rohr, G.: Z. Phys. A — Atoms and Nuclei318, 299 (1984)
Huizenga, J.R., Moretto, L.G.: Annu. Rev. Nucl. Sci.22. 427 (1972)
Rekstad, J., Henriquez, A., Ingebretsen, F., Midttun, G., Skaali, B., Oyan, R., Haugland, R., Messelt, S., Thorsteinsen, T.F., Løvhøiden, G., Ekström, L.P.: Phys. Lett.117B, 384 (1982)
Kühn, W., Chowdhuri, P., Janssens, R.V.F., Khoo, T.L., Haas, F., Kasagi, J., Ronningen, R.M.: Phys. Rev. Lett.51, 1858 (1983)
Brack, M.: Phys. Rev. Lett.53, 119 (1984)
Faber, M., Egido, J.L., Ring, P.: Phys. Lett.127B, 5 (1983)
Egido, J.L., Ring, P.: Phys. Rev. C25, 3239 (1982)
Vautherin, D., Vinh Mau, N.: Phys. Lett.120B, 261 (1983)
Meyer, J., Quentin, P., Brack, M.: Phys. Lett.133B, 279 (1983)
Barranco, M., Polls, A., Martorell, J.: Nucl. Phys. A444, 445 (1985)
Endt, P.M.: At. Nucl. Data Tables26, 47 (1981)
Schumacher, M., Zurmühl, U., Smend, F., Nolte, R.: Nucl. Phys. A438, 493 (1985)
Gilat, J., Jones III, E.R., Alexander, J.M.: Phys. Rev. C7, 1973 (1973)
Lister, C.J., Horn, D., Baktash, C., Mateosian, E. der, Kistner, O.C., Sunyar, A.W.: Phys. Rev. C23, 2078 (1981)
Cabot, C., Gauvin, H., Sergolle, H., Aguer, P., Bastin, G., Thibaud, J.P., Delagrange, H., Patin, Y.: Z. Phys. A — Atoms and Nuclei322, 393 (1985)
Gilat, J., Fleury, A., Delagrange, H., Alexander, J.M.: Phys. Rev. C16, 694 (1977)
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Tobbeche, S., Barrette, J., Haas, B. et al. Influence of the giant dipole resonance in the statistical decay of the compound nucleus160Er. Z. Physik A - Atomic Nuclei 325, 85–93 (1986). https://doi.org/10.1007/BF01294247
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DOI: https://doi.org/10.1007/BF01294247