Abstract
Radioactive recoil techniques have been developed for measuring angular distributions and range distributions of individual fission products following heavy ion induced fission. From these measurements, values can be extracted for the recoil velocity of the fissioning nucleus, the velocity imparted by fission, and the fission anisotropy. These techniques were applied to reactions of 101 MeV16O on238U, and confirmed that the reaction mechanism is essentially entirely complete fusion-fission. Accepting this, the data determine the kinetic energy release in forming the various products to a precision of 1%; while the overall magnitude of the energy is in good agreement with previous results, the data suggest a systematic correlation between kinetic energy and the position of a product on the nuclear charge dispersion curve, not previously reported, which is similar to but significantly larger in magnitude than the effect expected from simple Coulomb repulsion. Significant variations in anisotropy are also observed between products, which appear to be partially correlated with the variations in kinetic energy.
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References
Viola, V.E. Jr., Sikkeland, T.: Phys. Rev.128, 767 (1962)
Sikkeland, T., Haines, E., Viola, V.E. Jr.: Phys. Rev.125, 1350 (1962)
Lee, C.H., Yu, Y.W., Lee, D., Kudo, H., Moody, K.J., Seaborg, G.T.: Phys. Rev. C38, 1757 (1988)
Yu, Y.W., Lee, C.H., Moody, K.J., Kudo, H., Lee, D., Seaborg, G.T.: Phys. Rev. C36, 2396 (1987)
Alexander, J.M.: In: Nuclear chemistry. Yaffe, L. (ed.), Chap. 4. New York: Academic 1968
Tserruya, I., Steiner, V., Fraenkel, Z., Jacobs, P., Kovar, D.G., Henning, W., Vineyard, M.F., Glagola, B.G.: Phys. Rev. Lett.60, 14 (1988)
Goodall, J.-A.B.: UKAEA, Rept. No. AERE-M3185 1981 (unpublished)
Reus, U., Westmeier, W., Warnecke, I.: At. Nucl. Data Tables29, 1 (1983)
Parker, D.J., Asher, J., Conlon, T.W., Naqib, I.: Phys. Rev. C30, 143 (1984)
Parker, D.J., Hogan, J.J., Asher, J.: Phys. Rev. C35, 161 (1987)
Northcliffe, L.C., Schilling, R.F.: Nucl. Data Tables A7, 233 (1970)
Friedlander, G.: Proceedings of the Symposium on Physics and Chemistry of Fission, Vol. 2, p. 265. Wien: IAEA 1965 and many references compiled therein
Freiesleben, H., Kratz, J.V.: Phys. Rep.106, 1 (1984)
Hinde, D.J., Charity, R.J., Foote, G.S., Leight, J.R., Newton, J.O., Ogaza, S., Chattejee, A.: Nucl. Phys. A452, 550 (1986)
Hinde, D.J., Leigh, J.R., Bokhorst, J.J.M., Newton, J.O., Walsh, R.L., Boldeman, J.W.: Nucl. Phys. A472, 318 (1987)
Goeckerman, R.H., Perlman, I.: Phys. Rev.76, 628 (1949)
Lutzenkirchen, K., Kratz, J.V., Bruchle, W., Gaggeler, H., Summerer, K., Wirth, G.: Z. Phys. A — Atoms and Nuclei317, 55 (1984)
Viola, V.E. Jr., Kwiatkowski, K., Walker, M.: Phys. Rev. C31, 1550 (1985)
Viola, V.E. Jr., Back, B.B., Wolf, K.L., Kwes, T.C., Gelbke, C.K., Breuer, H.: Phys. Rev. C26, 178 (1982)
Back, B.B., Betts, R.R., Gindler, J.E., Wilkins, B.D., Saini, S., Tsang, M.B., Gelbke, C.K., Lynch, W.G., McMahon, M.A., Baisden, P.A.: Phys. Rev. C32, 195 (1985)
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This work was made possible by grants from the North Atlantic Treaty Organisation and the Natural Sciences and Engineering Research Council of Canada. Work described in this paper was undertaken as part of the Underlying Research Programme of the United Kingdom Atomic Energy Authority. Preliminary sorting and analysis of the decay data was performed by A. Bruccoleri and A. Wolf, McGill Chemistry Department and S. Montague, Nuclear Physics and Instrumentation Division, Harwell. Targets and catcher foils were prepared by M. Miller, NPID, Harwell.
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Parker, D.J., Hogan, J.J. & Asher, J. Fission product energies and anisotropies following complete fusion of16O+238U. Z. Physik A - Atomic Nuclei 336, 411–422 (1990). https://doi.org/10.1007/BF01294115
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DOI: https://doi.org/10.1007/BF01294115