Abstract
High multiplicity12C induced reactions in Ag(Br) at energies between 55A MeV and 110A MeV have been selected and investigated event by event in nuclear emulsions. Only a fraction of these events can possibly be described in terms of a normal thermal spectator-participant mechanism. Several events exhibit a violent breakup into several light and medium-mass fragments.
A strong suppression of projectile associated proton- and composite particle emission in the forward direction is found in comparison with inclusive spectra. A large part of the low energy protons originates from a very slow source, with a velocity comparable to that of the heaviest fragment. The parallel fraction of the c.m. energy in each event, which is governed by the more energetic protons, has a broad distribution with a mean value of 0.61 and thus shows no signals of collective production mechanisms.
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References
Bondorf, J.P.: Proc of the EPS Topical Conf. on Large Amplitude Collective Nuclear Motions, Keszthely, Hungary 482 (1979)
Scott, D.K.: Proc. of the Int. Conf. on Nuclear Physics Berkeley, USA 1980 and Michigan State University, Preprint MSUCL-337 (1980)
Jakobsson, B.: Invited talk at the 4th Nordic Meeting on Intermediate and High Energy Nuclear Physics, Geilo, Norway 1981. Lund University Internal Preprint LUIP 8102 (1981)
Scott, D.K.: Invited talk at the E.P.S. Int. Conf. on Nuclear and Atomic Physics with Heavy Ions 1981. Michigan State University Preprint MSUCL-359 (1981)
Stöcker, H., Cusson, R.Y., Maruhn, J.A., Greiner, W.: Z. Phys. A—Atoms and Nuclei294, 125 (1980)
Karvinen, A.O.T., De, J.N., Jakobsson, B.: Nucl. Phys. A367, 122 (1981)
Stöcker, H., Cusson, R.Y., Maruhn, J.A., Greiner, W.: Phys. Lett.101 B, 379 (1981)
Bondorf, J.P.: Proceedings of the Workshop on Nuclear Structure, Trieste, Italy and Proceedings of the 4th Bergen workshop on Nucl. Physics, Bergen, Norway (1982)
Randrup, J., Koonin, S.E.: Lawrence Berkeley Lab. Preprint LBL-10959 (1980)
Morrison, W.W., Samaddar, S.K., Sperber, D., Zielinska-Pfabe, M.: Phys. Lett.93B, 379 (1980)
van Bibber, K., Hendrie, D.L., Scott, D.K., Weiman, H.H., Schroeder, L.S., Gaega, J.V., Cessin, S.A., Treuhaft, R., Grossford, J.Y., Wong, C.Y.: Phys. Rev. Lett.43, 840 (1979)
Mougey, J., Ost, R., Buenerd, M., Cole, A.J., Guet, C., Lebrun, D., Loiseaux, J.M., Martin, P., Maurel, M., Monnand, E., Nifenecker, H., Perrin, P., Pinston, J., Ristori, C., de Saintignon, P., Schussler, F., Carlen, L., Jakobsson, B., Oskarsson, A., Otterlund, I., Schroder, B., Gustafsson, H.-Å., Johnsson, T., Ryde, H., Bondorf, J.P., Nielsen, O.B., Tibell, G.: Phys. Lett.105B, 25 (1981)
Jakobsson, B., Carlen, L., Kristiansson, P., Krumlinde, J., Oskarsson, A., Otterlund, L., Schroder, B., Gustafsson, H.-Å., Johansson, T., Ryde, H., Bondorf, J.P., Fai, G., Karvinen, A.O.T., Nielsen, O.B., Buenerd, M., Cole, J., Lebrun, D., Loiseaux, J.M., Martin, P., Ost, R., de Saintignon, F., Guet, C., Monnand, E., Mougey, J., Nifenecker, H., Perrin, P., Pinston, J., Ristori, C., Schussler, F.: Phys. Lett.102B, 121 (1981) and Proceedings of the 4th Bergen workshop on Nucl. Physics, Bergen, Norway (1982)
Lynen, U.: Proceedings of the 4th Bergen workshop on Nucl. Physics, Bergen, Norway (1982)
Dufour, J.P., Delagrange, H., DelMoral, R., Fleury, A., Hubert, F., Llabador, Y., Mauhourat, K.H., Schmidt, K.H., Lleres, A.: C.E.N. de Bordeaux-Gradignan Preprint CENB6 8202 (1982)
Aleklett, K.: Exp. SC87 at the CERN SC. Private communication
Westfall, G.D., Jacak, B.V., Anantaraman, N., Curtin, M.V., Crawley, G.M., Gelbke, C.K., Hasselquist, B., Lynch, W.G., Scott, D.K., Tsang, B.M., Murphy, M.J., Symons, T.J.M., Legrain, R., Majors, T.J.: Michigan State University Prep. MSUCL-365 (1982)
Blachot, J., Crancon, J., Genevey, J., Gizon, A., Lleres, A.: Z. Phys. A—Atoms and Nuclei301, 191 (1981)
Rivet, M.F.: Invited talk at the Int. Conf. on Selected Aspects of Heavy Ion Reactions. Saclay (1982)
Rosander, R., Larsson, L.: Univ. of Lund Preprint LUIP-CR-72-05 (1972)
Barkas, W.H.: Nuclear Research Emulsions I. New York: Academic Press (1963)
Jakobsson, B., Kuliberg, R.: Phys. Scr13, 327 (1976)
Jönsson, G.: Phys. Scr.20, 23 (1979)
Bjarle, C., Jönsson, G.: unpublished (1982)
Lindhard, J., Scharff, M., Schiött, H.E.: Nat1. Fys. Medd. Dan. Vid. Selsk. 33, no. 14 (1963)
Kullberg, R., Kristiansson, K., Lindkvist, B., Otterlund, I.: Nucl. Phys. A280, 491 (1977)
Dostrovsky, I., Rabinovitz, P., Bivins, R.: Phys. Rev.111, 1659 (1958)
Lynen, U.: (private communication)
Heckman, H.H., Crawford, H.J., Greiner, D.E., Lindstrom, P.J., Wilson, L.W.: Phys. Rev. C17, 1651 (1978)
Stock, R., Gutbrod, H.H., Meyer, W.G., Poskanzer, A.M., Sandoval, A., Gosset, J., King, C., Lukner, C., Van Sen, N., Westfall, G.D., Wolf, K.L.: GSI Preprint 79-22 (1979)
Greiner, D.E., Lindstrom, P.J., Heckman, H.H., Cork, B., Bieser, F.S.: Phys. Rev. Lett.35, 152 (1975)
Goldhaber, A.S.: Phys. Lett.47B, 306 (1974)
Bertsch, G.F., Amsden, A.A.: Phys. Rev. C18, 1293 (1978)
This calculation was performed by G.F. Bertsch
Randrup, J., Koonin, S.E.: Nucl. Phys. A356, 223 (1981)
Complete data for all events can be ordered from the authors
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We are grateful to G.F. Bertsch who suggested theq ‖ investigation and performed the cascade calculation. Furthermore we benefitted from several discussions with J.P. Bondorf. The support from the Bevalac staff at the LBL during the exposure is acknowledged. The work reported in this paper was financially sponsored by the Swedish Natural Science Research Council.
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Jakobsson, B., Jönsson, G., Lindkvist, B. et al. The disintegration of nuclei in violent heavy ion interactions at 55A MeV-110A MeV. Z Physik A 307, 293–304 (1982). https://doi.org/10.1007/BF01421292
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DOI: https://doi.org/10.1007/BF01421292