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  • 1
    Electronic Resource
    Electronic Resource
    Reactions Between Medium and Heavy Nuclei and Heavy ions of Less than 15 Mev/AMU (1974)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Nuclear and Particle Science 24 (1974), S. 279-340 
    Details
    ISSN: 0066-4243
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ns.24.120174.001431
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  • 2
    Electronic Resource
    Electronic Resource
    Light particle emission in deeply inelastic collisions of 280 MeV40Ar+58Ni: Thermal equilibrium and angular momentum transfer (1980)
    Springer
    The European physical journal 295 (1980), S. 153-167 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Protons andα-particles emitted in coincidence with a deep inelastic fragment produced in the reaction40Ar (280 MeV)+58Ni have been measured. From a detailed study of their in-plane angular distribution, it is shown that the bulk of the light charged particle emission can be attributed to a secondary evaporation process by the two primary deep inelastic fragments. A lowest estimate of the fragment spin (assuming total alignment perpendicular to the reaction plane) is obtained from the anisotropy of the out-of-plane angular distribution of theα-particles. For very asymmetric splitting, the heavy fragment spin estimate as obtained from theα-anisotropy measurement is consistent with the observed proton toα-particle multiplicity ratio. The results are in agreement with the hypothesis of a sticking configuration between two deformed nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01413073
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  • 3
    Electronic Resource
    Electronic Resource
    Coincidence studies of heavy fragment pairs in the reaction 343 MeV40Ar+197Au (1982)
    Springer
    The European physical journal 307 (1982), S. 237-245 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Measurements are reported for correlated energies and angles of heavy fragments from reactions of 343 MeV40Ar with197Au. The results show a continuous evolution of the mass distributions from fission-like products at angle pairs of ≈60 and 300 degrees to deeply inelastic projectile-like products at ≈45° and 300°. Certain difficulties are emphasized for the use of the “symmetric fragmentation” cross sections in the context of current theoretical models (e.g. the “extra push” theory). The fission-like reactions have been studied in some detail and the results have been compared to a Monte Carlo kinematic simulation. To account for the experimental results forward-peaked light particle emission (n, H, He) must occur in a large fraction of the fission-like reactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01438644
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Comparison of semiclassical and quantum mechanical angular distributions for nuclear fission and evaporation (1986)
    Springer
    The European physical journal 324 (1986), S. 331-345 
    Details
    ISSN: 1434-601X
    Keywords: 25.85 ; 24.10 ; 24.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract There is quite a variety of statistical-model equations in the literature that have been derived with different assumptions and for various classes of nuclear reactions. Some have been obtained by consideration of the quantum mechanics and some by semiclassical approximations thereto. Often it is not clear whether or not the results of certain analyses are clouded by these semiclassical approximations. We consider three statistical models that have been heavily employed in recent years: (1) fission decay from a rigid rotor (2) particle evaporation from a spherical system and (3) fission decay from two uncoupled spheres. Comparisons are made of numerical results from semiclassical and from quantum mechanical equations for certain specific reactions. In addition, some general features are displayed and discussed for the differences between these formalisms. For average spins that are often encountered in heavy ion reactions, the results are very similar. We conclude that major differences in current analyses are not due to the methodology; instead they must center on assumptions concerning the physical nature of the transition-state (or decision-point) configurations and their associated level densities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294588
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  • 5
    Electronic Resource
    Electronic Resource
    Anomalous behavior of evaporative H/He from194Hg compound nuclei (1982)
    Springer
    The European physical journal 307 (1982), S. 149-158 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract From measured cross sections for evaporative1H and4He, we have unfolded the separate effects of excitation energy (E) and spin (J) on the decay of194Hg. The analysis depends only on Bohr's independence hypothesis and on certain general features of the transmission coefficients for fusion. Evaporation-like emission of1H and4He increases rapidly with energy but decreases rather mildly with initial spin. Significant emission occurs even for very high spins where the calculated fission barrier is essentially zero. The equilibrium model for fission-evaporation competition is brought into question forE*≳98 MeV and J≳65 ħ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01414829
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