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Träfflista för sökning "WFRF:(Sotty C.) srt2:(2012-2014)"

Search: WFRF:(Sotty C.) > (2012-2014)

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1.
  • Seidlitz, M., et al. (author)
  • Coulomb excitation of Na-29,Na-30: Mapping the borders of the island of inversion
  • 2014
  • In: Physical Review C (Nuclear Physics). - 0556-2813. ; 89:2
  • Journal article (peer-reviewed)abstract
    • Nuclear shell evolution in neutron-rich Na nuclei around N = 20 was studied by determining reduced transition probabilities, i.e., B(E2) and B(M1) values, in order to map the border of the island of inversion. To this end Coulomb-excitation experiments, employing radioactive Na-29,Na-30 beams with a final beam energy of 2.85 MeV/nucleon, were performed at REX-ISOLDE, CERN. De-excitation gamma rays were detected by the MINIBALL gamma-ray spectrometer in coincidence with scattered particles in a segmented Si detector. Transition probabilities to excited states were deduced. The measured B(E2) values agree well with shell-model predictions, supporting the idea that in the Na isotopic chain the ground-state wave function contains significant intruder admixture already at N = 18, with N = 19 having an almost pure two-particle-two-hole deformed ground-state configuration.
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2.
  • Törnqvist, Hans, 1985, et al. (author)
  • Tilted foils polarization at REX-ISOLDE
  • 2013
  • In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. - : Elsevier BV. - 0168-583X. ; 317:PART B, s. 685-688
  • Journal article (peer-reviewed)abstract
    • The tilted-foils nuclear-spin polarization method has been evaluated using the REX-ISOLDE linear accelerator at the ISOLDE facility, CERN. A beam of 8Li delivered with an energy of 300 keV/u traversed through one Mylar foil to degrade the beam energy to 200 keV/u and consequently through 10 thin diamond-like carbon foils to polarize the nuclear spin. The attained nuclear spin polarization of 3.6±0.3% was measured with a β-NMR setup.
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3.
  • Törnqvist, Hans, 1985, et al. (author)
  • Implementation and evaluation of tilted foils polarization at REX-ISOLDE
  • 2012
  • In: Physica Scripta. - 1402-4896 .- 0031-8949. ; T150:T150
  • Journal article (peer-reviewed)abstract
    • The progress within atomic and nuclear physics relies on refining and adding new observables. One of these is the polarization of the nuclear spin, where there is a manifest interest in accessing a wide variety of polarized beams, e. g. at energies suitable for Coulomb excitation and transfer experiments. In particular, exotic nuclei with half-lives considerably less than one second are difficult to produce, but the issues present in traditional methods could be overcome by using the tilted foils technique. Two setups for measuring the degree of polarization of an ion beam after the REX-ISOLDE linear accelerator at CERN are being evaluated. An approach based on Coulomb excitation has been utilized in an experiment and preliminary results will be presented. Furthermore, a beta-NMR setup is currently under construction that will take radioactive beams soon.
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  • Result 1-3 of 3

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