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Nature of continua in inelastic α- and6Li-scattering at 26 MeV/A

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Zeitschrift für Physik A Atomic Nuclei

Abstract

The continua excited by inelastic scattering of 26 MeV/Aα- and6Li-particles from28Si have been studied at forward angles by coincident detection ofγ-rays in final nuclei after particle decay. While the coincident γ-ray spectra in6Li-induced reactions show only transitions in massA=24, 27 and 28 nuclei, in theα-induced reactionsγ-transitions in mass 20 to 28 nuclei were observed.

Inelastic6Li-scattering with energy losses between 30 and 80 MeV predominantly leads toγ-transitions in27Si and27Al. We interpret this as due to a dominant direct one-nucleon removal process producing the characteristic “triangular” shapes of the inclusive inelastic6Li spectra.6Li-induced reactions on27Al show a corresponding behaviour. The typical flatα-spectra result from additional truly inelastic processes which lead to highly excited states in the target nuclei and subsequent evaporation of nucleons andα-particles. This is supported by the measuredγ-multiplicities and by means of Hauser-Feshbach calculations which allow to deduce that part of the inelasticα-continuum which decays by particle evaporation.

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References

  1. Wagner, G.J.: Giant multipole resonances. Bertrand, F.E. (ed.), pp. 251–274. Chur, London, New York, Harwood: Academic Publishers 1980

    Google Scholar 

  2. Knöpfle, K.T.: Nuclear interactions. In: Lecture Notes in Physics. Robson, B.A. (ed.), Vol.92, pp. 445. Berlin, Heidelberg, New York: Springer 1979

    Google Scholar 

  3. Bertsch, G.: Proceedings of the International Workshop on “Reaction Models for Continuous Spectra of Light Particles”, Ernst, J. (ed.), p. 19. Bad Honnef 1978

  4. Gadioli, E., Gadioli-Erba, E.: Z. Phys. A — Atoms and Nuclei299, 1 (1981)

    Google Scholar 

  5. Bertsch, G., Scholten, O.: Phys. Rev. C35, 804 (1982)

    Google Scholar 

  6. Kim, B.T., Udagawa, T., Tamura, T.: Phys. Rev. C30, 1087 (1984)

    Google Scholar 

  7. Knöpfle, K.T., Sauter, A., Wagner, G.J., Doll, P., Hendrie, D.L., Wieman, H.: Proceedings of the International Conference on Nuclear Physics. Vol. 1 (LBL-11118), p. 262. Berkeley 1980

    Google Scholar 

  8. Gils, H.J., Rebel, H., Buschmann, J., Klewe-Nebenius, H.: Phys. Lett.68B, 427 (1977)

    Google Scholar 

  9. Nitsche, W., Wagner, G.J., Knöpfle, K.T., Grabmayr, P., Riedesel, H.: Z. Phys. A — Atoms and Nuclei300, 109 (1981)

    Google Scholar 

  10. Wiggins, J., Singh, P.P., Drentje, A., Harakeh, M., Kailas, S., Saber, M., Sjoren, T.P., Woude, A. van der: Proceedings of the International Conference on Nuclear Physics. Vol. 1 (LBL-11118), p. 252. Berkeley 1980

    Google Scholar 

  11. Wiggins, J.: Ph. D. Thesis, Indiana University, IUCF internal report 81-2 (1981)

  12. Knöpfle, K.T., Riedesel, H., Schindler, K., Wagner, G.J., Mayer-Böricke, C., Oelert, W., Rogge, M., Turek, P.: Phys. Rev. Lett.46, 1372 (1981)

    Google Scholar 

  13. Riedesel, H., Knöpfle, K.T., Schindler, K., Wagner, G.J., Oelert, W., Rogge, M., Turek, P.: Nucl. Phys. A454, 85 (1986)

    Google Scholar 

  14. Pühlhofer, F.: Nucl. Phys. A280, 267 (1977)

    Google Scholar 

  15. Brown, D.R., Halpern, I., Calarco, J.R., Russo, P.A., Hendrie, D.L., Homeyer, H.: Phys. Rev. C14, 896 (1976)

    Google Scholar 

  16. Tribble, R.E., Kubo, K.I.: Nucl. Phys. A282, 269 (1977)

    Google Scholar 

  17. Schmid, K.W.: Phys. Rev. C24, 1283 (1981)

    Google Scholar 

  18. Van Giai, N.: Phys. Lett.105B, 11 (1981)

    Google Scholar 

  19. Doll, P., Hendrie, D.L., Mahoney, J., Menchaca-Rocha, A., Scott, D.K., Symons, T.J., Van Bibber, K., Viyogi, Y.P., Wieman, H.: Phys. Rev. Lett.42, 366 (1979)

    Google Scholar 

  20. Oertzen, W. von: Nucl. Phys. A387, 93c (1982)

    Google Scholar 

  21. Bonin, A., Alamanos, N., Berthier, B., Bruge, G., Farragi, H., Legrand, D., Lugol, J.C., Mittig, W., Papineau, L., Yavin, A.I., Scott, D.K., Levine, M., Arvieux, J., Farvacque, L., Buenerd, M.: Nucl. Phys. A430, 349 (1984)

    Google Scholar 

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Dedicated to Professor Theo Mayer-Kuckuk on the occasion of his 60th birthday

Work supported in part by KfK Karlsruhe

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Nitsche, W., Wagner, G.J., Knöpfle, K.T. et al. Nature of continua in inelastic α- and6Li-scattering at 26 MeV/A. Z. Physik A - Atomic Nuclei 326, 435–446 (1987). https://doi.org/10.1007/BF01289548

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  • DOI: https://doi.org/10.1007/BF01289548

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