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Träfflista för sökning "WFRF:(Nilsson Karin) ;lar1:(cth);pers:(Bergmann U. C.)"

Search: WFRF:(Nilsson Karin) > Chalmers University of Technology > Bergmann U. C.

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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.
  • Bergmann, U. C., et al. (author)
  • On the beta-decay of C-9
  • 2001
  • In: Nuclear Physics A. - 0375-9474. ; 692:3-4, s. 427-450
  • Journal article (peer-reviewed)abstract
    • In beta -decay experiments on C-9 at CERN/ISOLDE the beta -strength was determined to the ground state, the 12.2 MeV excited state and the Isobaric Analog State (IAS) at 14.655 MeV in B-9. A large beta -strength asymmetry is deduced for the mirror transitions of C-9 and Li-9 to states around 12 MeV excitation energy. A satisfactory description of the three-body decay from a narrow energy region around the 12.2 MeV resonance is obtained within a sequential model involving the ground and first-excited states of Li-5 and Be-8. From the study of angular correlations the spin of the 12.2 MeV state is determined as 5/2(-). For the first time the population of the IAS is observed in beta -decay and new information on the decay of this state is obtained. The advantages of a closely packed. highly segmented detector setup are demonstrated. (C) 2001 Elsevier Science B.V. All rights reserved.
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3.
  • Borge, M. J. G., et al. (author)
  • Proton dripline studies at ISOLDE: Ar-31 and C-9
  • 2002
  • In: Nuclear Physics A. - 0375-9474. ; 701, s. 373C-377C
  • Conference paper (peer-reviewed)abstract
    • In this contribution examples of the application of new technologies to disentangle the mechanism of beta-delayed multiparticle emission are given. In particular the mechanism of beta-delayed two-proton emission from Ar-31 has been resolved and proved to be sequential, a preview of C-9-decay data is discussed. (C) 2002 Elsevier Science B.V. All rights reserved.
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4.
  • 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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5.
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  • Result 1-5 of 5

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