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  • 1980-1984  (2)
  • 1975-1979  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Some (γ, 1p × n) reactions in118Sn at intermediate energies (1975)
    Springer
    The European physical journal 275 (1975), S. 261-267 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Yield curves for the production of117g In,117m In,116m1In,115m In,113m In,111In,110h In,110l In,109In,108hIn and108lIn from enriches118Sn have been measured by the activation method in the energy region 75–800 MeV. The cross sections have been deduced and for117In,110In and108In isomeric cross section ratios have been determined. The experimental cross sections are compared to calculations with a cascade-evaporation model and to cross sections calculated with a semi-empirical formula. The isomeric ratios are compared to calculations based on the statistical formalism by Huizenga and Vandenbosch together with cascade-evaporation theory. The (γ, p) cross section and isomeric ratio are also compared to calculations based on a direct knock-out formalism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01409294
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Medium energy proton induced fission in Tb, La and Ag (1979)
    Springer
    The European physical journal 293 (1979), S. 241-251 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Coincidence studies with silicon surface barrier detectors have been used to determine fragment kinetic energies, angular correlations and fission cross sections in the fission of Ag,139La,159Tb and U nuclei induced by 600 MeV protons. Symmetric mass distributions are deduced for Ag and Tb, whereas La shows an indication of a stable asymmetric mass distribution. We find no indication of the Businaro-Gallone point. Fission-spallation competition calculations are used to deduce values of macroscopic fission barrier heights and nuclear level density parameter values at deformations corresponding to the saddle point shapes. We find macroscopic fission barriers lower than those predicted by macroscopic theories. The total kinetic energies at symmetric mass divisions follow closely the Viola prediction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01435593
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Yields and recoil properties of products from the reaction between natural copper and 86 MeV/A12C ions (1982)
    Springer
    The European physical journal 306 (1982), S. 43-50 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Absolute cross sections and thick target/thick catcher recoil properties have been determined for radionuclides produced in the reaction between copper and 86 MeV/A12C ions. Integration of the obtained mass yield curve gives a cross section of reactions leading to spallation products of 1,440 mb. TheF/B-ratios are found to increase with decreasing product mass, reaching a maximum of ∼100 for products with masses 20–25 mass units lower than the target mass, followed by a decrease. The recoil data have been analyzed with the two-step vector model to deduce momentum transfer and product kinetic energies. The momentum transferred to an intermediate system is found to increase for reactions leading to decreasing product masses, reaching values of 1/3 of full momentum transfer. The derived mean kinetic energies are found to be higher than found in comparable proton induced reactions. Some possible explanations for this phenomenon have been discussed. The results have been compared with Monte Carlo cascade-evaporation calculations, and the agreement between the predictions and experiment is in general found to be good.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01413406
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Spallation of V induced by 1 GeV12C-ions and by 258, 350 and 910 MeV3He-ions (1984)
    Springer
    The European physical journal 315 (1984), S. 355-369 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Cross Sections and thick target/thick catcher recoil properties have been measured for radionuclides formed in the interaction of 258, 350 and 910 MeV3He-ions and 1032 MeV12C-ions with V in order to study the systematics of their variation with product mass and energy and type of the incident projectile. The slope of the mass yield curves is observed to decrease with increasing bombarding energy. The dominant projectile variable determining the slope is the total kinetic energy, and the slopes are independent of the type of projectile. TheF/B-ratios are found to increase with decreasing bombarding energy, reaching a maximum value of 135 for the lowest energy studied. The maximum is around 15 mass units below the target mass. The recoil data have been analyzed with the two step vector model to deduce the mean kinetic parameters. The momentum transfer is observed to increase for reactions leading to decreasing product masses, and to occur most efficiently from the lower velocity projectiles. The results have been compared with Monte-Carlo cascade evaporation calculations and generally there is good agreement between predictions and experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01438461
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    Paper (German National Licenses)
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