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  • 1990-1994  (3)
  • 21.60.Gx  (2)
  • 34.50.Bw  (1)
  • 21.60.Cs
  • 25.40
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Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Theoretical evidence for di-molecular rotational behaviour in the hypernuclei ∑ 8 Li and ∑ 8 Be (1991)
    Springer
    The European physical journal 339 (1991), S. 523-530 
    Details
    ISSN: 1434-601X
    Keywords: 21.80.+a ; 21.60.Gx
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have performed microscopic cluster studies of light∑-hypernuclei based on effective nucleon-nucleon and two different sigma-nucleon interactions. Our calculation confirms a bound 0+ state in ∑ 4 He and ∑ 4 H, but reveals no evidence for levels in other partial waves. We have investigated the ∑ 8 Li and ∑ 8 Be hypernuclei in a microscopic 3-cluster approach. For both hypernuclei, our calculation shows that the lowest levels in the partial wavesJ=0–4 are bound or quasibound states of collective nature and show a strong α ∑ 4 H and α + ∑ 4 He clustering. These levels form a sequence of states which can be well interpreted as arising from a rotatingα+ ∑ 4 H orα+ ∑ 4 He di-molecule. Our results are compared to those of similar studies for lightΛ-hypernuclei which do not show evidence for this kind of collective degrees of freedom.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01288436
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The low-energyD(α, γ)6Li and6Li+208Pb→D+α+208Pb cross sections (1991)
    Springer
    The European physical journal 339 (1991), S. 335-339 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.Gx ; 23.20.−g ; 25.55.−e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have calculated theE1 andE2 contributions to the low-energyD(α,γ)6Li fusion and to the6Li+208Pb →D+α+208Pb Coulomb dissociation cross sections within a multichannel Resonating Group calculation based on many-body deuteron+α configurations and pseudo-states. For both reactions experimentally determined cross sections are reasonably well reproduced. We find that dipole capture contributes noticeably to the fusion cross sections atE≦500 keV, while it is negligible in the Coulomb dissociation data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01560634
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Monte Carlo simulations of the Lewis effect (1990)
    Springer
    The European physical journal 336 (1990), S. 403-410 
    Details
    ISSN: 1434-601X
    Keywords: 34.50.Bw
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Recent experiments measuring the thick-target yield curve of narrow resonances in (p, γ) reactions on23Na,26Mg and27Al nuclei clearly show the Lewis effect. We have studied this effect theoretically on the basis of a Monte Carlo simulation of the nuclear and electronic energy loss curve in the target. We are able to reproduce the experimental data qualitatively. We discuss possible implications of precision measurements of the Lewis effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294114
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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