Abstract
The population of the three fission modes predicted by Brosa's multi-channel fission model for the uranium region was studied in different fissioning systems. They were produced bombarding232Th and238U targets by light charged particles with energies slightly above the Coulomb barrier. Though the maximum excitation energy of the compound nucleus amounted to about 22 MeV, the influences of various spherical and deformed nuclear shells on the mass and total kinetic energy distributions of fission fragments are still pronounced. The larger variances of the total kinetic energy distributions compared to those of thermal neutron induced fission were explained by temperature dependent fluctuations of the amount and velocity of alteration of the scission point elongation of the fissioning system. From the ratio of these variances the portion of the potential energy dissipated among intrinsic degrees of freedom before scission was deduced for the different fission channels. It was found that the excitation remaining after pre-scission neutron emission is mainly transferred into intrinsic heat and less into pre-scission kinetic energy.
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Hulet, E.K., Wild, J.F., Dougan, R.J., Lougheed, R.W., Landrum, J.H., Dougan, A.D., Schädel, M., Hahn, R.L., Baisden, P.A., Henderson, C.M., Dupzyk, R.J., Sümmerer, K., Bethune, G.R.: Phys. Rev. Lett.56, 313 (1986)
Itkis, M.G., Okolovich, V.N., Rusanov, A.Ya., Smirenkin, G.N.: Z. Phys. A — Atoms and Nuclei320, 433 (1985)
Britt, H.C., Wegner, H.E., Gursky, J.C.: Phys. Rev.129, 2239 (1963)
Strutinski, V.M.: Nucl. Phys. A95, 420 (1967)
Pashkevich, V.V.: Nucl. Phys. A169, 275 (1971)
Brosa, U., Grossmann, S., Müller, A.: Z. Naturforsch.41a, 134 (1986)
Brosa, U., Grossmann, S., Müller, A.: Z. Phys. A — Atomic Nuclei325, 241 (1986)
Brosa, U., Grossmann, S., Müller, A.: Proc. 16th Int. Symp. Nucl. Phys. Gaussig 1986,ZfK-610, 162 (1986)
Brosa, U., Grossmann, S., Müller, A.: GSI-Nachrichten08-87, 13 (1987)
Baisin, S.D., Shdanov, S.V., Itkis, M.G., Okolovich, V.N., Smirenkin, G.N., Subbotin, M.I.: Jadernaja Fizika50, 626 (1989); Proc. Int. Conf. on Heavy Ion Phys., Dubna, October 1989, (to be published)
Matthies, A., Gippner, P., Kotte, R., Ortlepp, H.-G., Schilling, K.D., Seidel, W., Stary, F., Wohlfarth, D.: Proc. Int. Conf. on Heavy Ion Phys., Dubna, October 1989 (to be published)
Seidel, W., Ortlepp, H.-G., Stary, F., Sodan, H.: Nucl. Instrum. Methods Phys. Res. A273, 536 (1988)
Ziegler, J.F., Biersack, J.P., Littmark, U.: The stopping and ranges of ions in solids. New York: Pergamon Press 1985
Hambsch, F.-J.: Thesis, TH Darmstadt D 17 (1987)
Wien, R.: Thesis, Univ. Hamburg 1986
Mutius, r.v.: Thesis, Univ. Bonn 1985
Geltenbort, P.: Thesis, Univ. Tübingen 1985
Rohmann, D.: Thesis, Univ. Bonn 1982
Viola, V.E., Kwiatkowski, K., Walker, M.: Phys. Rev. C32, 1550 (1985)
Knitter, H.-H., Hambsch, F.-J., Budtz-Jorgensen, C.: Z. Naturforsch.42a, 786 (1987)
Grossmann, S., Brosa, U., Müller, A.: Nucl. Phys. A481, 340 (1988)
Brosa, U.: Proc. 18th Int. Symp. on Nucl. Phys., Gaussig 1988 (in press)
Matthies, A.: Thesis, ZfK Rossendorf (to be published)
Vandenbosch, R., Huizenga, J.R.: Nuclear fission, p. 316. New York: Academic Press 1973
Wilkins, B.D., Steinberg, E.P., Chassman, R.R.: Phys. Rev. C14, 1832 (1976)
Quade, U., Rudolph, K., Skorka, S., Armbruster, P., Clerc, H.-G., Lang, W., Mutterer, M., Schmitt, C., Theobald, J.P., Gönnenwein, F., Pannicke, J., Schrader, H., Siegert, G., Engelhardt, D.: Nucl. Phys. A487, 1 (1988)
Gönnenwein, F.: Proc. Int. School-Seminar on Heavy Ion Physics, Dubna/USSR 1986, DubnaD7-87-68, 232 (1987)
Boucheneb, N., Geltenbort, P., Asghar, M., Barreau, G., Doan, T.P., Gönnenwein, F., Leroux, B., Oed, A., Sicre, A.: Proc. Int. Conf. on Fifty Years Research in Nucl. Fission, Berlin/West April 1989; Nucl. Phys. A502, 261c (1989)
Müller, A., Grossmann, S., Brosa, U.: GSI-Scientific Report 1988, p. 92
Wagemans, C., Schillebeeckx, P., Deruytter, A.: Proc. Int. Conf. on Fifty Years Research in Nucl. Fission, Berlin/West, April 1989; Nucl. Phys. A502, 287c (1989)
Straede, Ch., Budtz-Jorgensen, C., Knitter, H.-H.: Nucl. Phys. A462, 85 (1987)
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Matthies, A., Kotte, R., Seidel, W. et al. Fission modes in charged-particle induced fission. Z. Physik A - Atomic Nuclei 337, 439–446 (1990). https://doi.org/10.1007/BF01294981
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DOI: https://doi.org/10.1007/BF01294981