By Wolfgang Nörenberg, Hans A. Weidenmüller (auth.)
With the appearance of heavy-ion reactions, nuclear physics has obtained a brand new frontier. the hot heavy-ion resources working at electrostatic accelerators and the high-energy experiments played at Berkeley, Dubna, Manchester and Orsay, have spread out the sphere, and feature proven us extraordinary new clients. the recent accelerators now lower than development at Berlin, Daresbury and Darmstadt, in addition to these into account (GANIL, Oak Ridge, and so on. ) are anticipated so as to add considerably to our wisdom and figuring out of nuclear houses. this is applicable not just to such unique themes because the life and lifetimes of superheavy components, or the possibil ity of concern waves in nuclei, but in addition to such extra mundane matters as high-spin states, new areas of deformed nuclei and friction forces. the sector grants not just to supply a wealthy number of attention-grabbing phenomena, but additionally to have commonplace theoretical implications. Heavy-ion reactions are characterised by means of the massive lots of the fragments, in addition to the excessive overall power and the massive overall angular momentum mostly concerned about the collision. A merely quantum-mechanical description of this sort of collision method should be too complex to be both attainable or inter esting. we think and, in a few cases,know that the classical restrict, the restrict of geometrical optics, a quantum-statistical or a hydrodynamical description appropriately account for common features.
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Extra info for Introduction to the Theory of Heavy-Ion Collisions
AR 73, LE 73, - 23 - For a recent review see [ FL 74 ] 40Ar(297, 388 MeV)+ 232 Th + 20 9Bi [wo 74] Fig. 1 [AR Some typical results of the experiments 84 73] , 63 cu(365 MeV) + 197 Au and Kr(6oo MeV) are shown in figs. 6 shows some typical results obtained in the collision 40Ar(388 MeV) + 232 Th , Reaction products with masses close to Ar are seen to be produced within a broad range of energies. Generally, the spectra consist of two contributions, a high energy part and a low energy part. The high energy part has been attributed [AR 73, WI 73] to a positive deflection angle 61=-9, and the low energy part to the corresponding negative deflection angle ' @~ - e It is assumed that in order to reach the negative deflection angles the nuclei stay together for a longer time than would be needed for scattering into positive deflection angles.
Denoted by peak~ The corresponding radius is called Rc • Different channels will in general lead to different values for barrier height and barrier radius. 1) into the form Qcc' ( . +E + ext Qcc' o<.!. 2) does not contain the angular momentum barrier and is thus appropriate only if the angular momenta and the masses in the two channels are nearly the same. To avoid misunderstandings, we emphasize that in eq. 2), T~~) is the asymptotic kinetic energy. To obtain an idea of the dependence of consider two nuclei (z 1 ,A 1 ) and distance Qcc' on mass number and charge, we (z 2 ,A 2 ) in their ground states R .
Rowley, Nucl. Phys. A219 (1974) 79 co 75 P. Colombani, N. C. Jacmart, M. Riou, ~ N. C. Roynette, Phys. Lett. ~ c. Stephan, H. H. Deubler, K. Dietrich, Phys. Lett. FL 74 A. Fleury, J,M. Alexander, Ann. Rev. Nucl, Sci. E. Gross, H. Kalinowski, Phys. Lett. H,E. Gross, Nucl, Phys, A240 (1975) 472 [HA 75] , p. E. Gross, H. N. De, in ref. HA F. Hanappe, M. Lefort, C. Ng$, J. Peter, B. L. Harney et al. (1 Springer Verlag,Berlin- Heidelberg-New York, 1975) HO 76 H. Hofmann, P. Phys. C. Jacmart, P. Colombani, H.
Introduction to the Theory of Heavy-Ion Collisions by Wolfgang Nörenberg, Hans A. Weidenmüller (auth.)