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Träfflista för sökning "WFRF:(Wilhelmsen L) ;pers:(Jonson Björn 1941);pers:(Johannsen L.)"

Search: WFRF:(Wilhelmsen L) > Jonson Björn 1941 > Johannsen L.

  • Result 1-6 of 6
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1.
  • Nilsson, Thomas, 1965, et al. (author)
  • Neutron Momentum Distributions from Core Break-up Reactions of Halo Nuclei
  • 1995
  • In: Europhysics Letters. - 0295-5075 .- 1286-4854. ; 30:1, s. 19-24
  • Journal article (peer-reviewed)abstract
    • Neutron angular distributions from violent break-up reactions of Li-11 and Be-11 have been measured at 28 MeV/u and 280 MeV/u and at 41 MeV/u and 460 MeV/u, respectively. The derived neutron momentum distributions show a narrow component in transverse momentum that is within uncertainties independent of beam energy and target charge. This component is suggested to be simply related to the momentum distribution of the loosely bound halo neutron(s) in the projectiles.
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2.
  • Tengblad, O., et al. (author)
  • Study of Neutron Rich Neon Isotopes
  • 1992
  • In: Zeitschrift fur Physik A Hadrons and Nuclei. - 1431-5831 .- 0939-7922. ; 342:3, s. 303-307
  • Journal article (peer-reviewed)abstract
    • The half-lives and P(n)-values of the neutron rich isotopes Ne-26-29 have been determined. The results are compared to shell-model calculations and good agreement is found except for Ne-29, where the half-life exceeds the predictions by more than an order of magnitude. This unexpectedly long half-life can be explained as due to a fp intruder configuration.
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4.
  • Borge, M. J. G., et al. (author)
  • Study of Charged-Particles Emitted in the Beta-Decay of He-6,He-8
  • 1993
  • In: Nuclear Physics A. - 0375-9474. ; 560:2, s. 664-676
  • Journal article (peer-reviewed)abstract
    • The beta-delayed charged particle spectra from He-6 and He-8 were measured with a telescope consisting of a gas counter and a Si surface barrier detector. Beta-delayed deuterons and tritons are emitted in the two cases with branching ratios of (7.6 +/- 0.6) x 10(-6), E(d) > 350 keV and (8.0 +/- 0.5) x 10(-3), respectively. Both spectra present anomalies that must be due to the special structure of these nuclei (an alpha core surrounded by several neutrons).
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5.
  • Borge, M. J. G., et al. (author)
  • Super-Allowed Beta-Decay of Nuclei at the Drip-Line
  • 1991
  • In: Zeitschrift fur Physik A Hadrons and Nuclei. - 1431-5831 .- 0939-7922. ; 340:3, s. 255-261
  • Journal article (peer-reviewed)abstract
    • We have investigated the continuous particle spectra following the beta decay of the neutron-rich nuclei that terminate the mass 6, 8, 9 and 11 isobaric chains. Strong beta transitions feeding the very top of the spectrum are found systematically. The favoured states are within a few MeV of the energy of the initial state. This phenomenon seems to be linked to the occurrence of a di-neutron structure or neutron halo in the drip-line nuclei.
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  • Result 1-6 of 6

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