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Träfflista för sökning "WFRF:(Wilhelmsen Rolander Katarina 1962 ) ;pers:(Jeppesen H. B.)"

Search: WFRF:(Wilhelmsen Rolander Katarina 1962 ) > Jeppesen H. B.

  • Result 1-5 of 5
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1.
  • Bergmann, U. C., et al. (author)
  • Analysis of decay data from neutron-rich nuclei
  • 2001
  • In: European Physical Journal A. - 1434-601X .- 1434-6001. ; 11:3, s. 279-284
  • Journal article (peer-reviewed)abstract
    • The beta -decays of the neutron-rich nuclei Be-12 and Ne-29 have been studied. The statistical correlations between the almost identical half-lives of Be-12 and its daughter B-12 are analysed for a large sample of Be-12 decay data. Stringent mutual bounds are obtained on the parameter set, leading to a precise determination of the Be-12 half-life of 21.50 +/- 0.04 ms. From a simultaneous detection of beta -particles and neutrons from the decay of Ne-29 the neutron emission probability, P-n, is determined to 17 +/- 5%. No indication of two-neutron emission is seen from this nucleus. An upper limit of 2.2% (90% confidence level) is established for P-2n.
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2.
  • Jeppesen, H. B., et al. (author)
  • News on beta delayed particle emission from Be-14
  • 2002
  • In: Progress of Theoretical Physics Supplement. - 0375-9687. ; :146, s. 520-524
  • Conference paper (peer-reviewed)abstract
    • Beta delayed charged particles from Be-14 have been measured and give an upper limit on beta delayed alpha particles of B(betaalpha)
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4.
  • Madurga, M., et al. (author)
  • Study of β-delayed charged particle emission of 11Li: Evidence of new decay channels
  • 2008
  • In: Journal of Physics: Conference Series. - : IOP Publishing. - 1742-6588 .- 1742-6596. ; 111:1
  • Journal article (peer-reviewed)abstract
    • The break-up of the 18.2 MeV state in 11Be was studied in a 11Li β-decay experiment. We report here on the study of the dominating breakup channels involving na6He or 3n2α in the final state, with special emphasis dedicated in this contribution to the three-particle channel. The two emitted charged particles were detected in coincidence using a highly segmented experimental set-up. The observed experimental energy-vs-energy scatter plot indicates a sequential breakup where nuclei of mass 4, alpha particles, and mass 7, 7He, are involved. A Monte-Carlo simulation of the sequential channel, 11Be* → α + 7He → nα6He was performed and compared to the experimental data and to a simulation of the direct break-up of the 18.2 MeV state nα6He by phase space energy distribution. The energy-versus-energy plot are explained by the sequential simulation but not by the phase space simulation.
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5.
  • Prezado, Y., et al. (author)
  • Large asymmetry in the strongest beta-transition for A=9
  • 2003
  • In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 576:1-2, s. 55-61
  • Journal article (peer-reviewed)abstract
    • A new measurement of the beta-decay of Li-9 has clarified the feeding to the highest accessible states in Be-9. It is found that the P-decay mainly populates the 11.8 MeV state, whose spin is determined as 5/2(-). The extracted B-GT value of 5.3(0.9) is a factor 4.4(1.0) larger than that of the mirror transition from C-9. A theoretical explanation of such a pronounced beta-decay asymmetry is presently lacking. (C) 2003 Elsevier B.V. All rights reserved.
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  • Result 1-5 of 5

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