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  • Aksyutina, Yuliya,1983Chalmers tekniska högskola,Chalmers University of Technology (author)

Properties of the 7He ground state from 8He neutron knockout

  • Article/chapterEnglish2009

Publisher, publication year, extent ...

  • Elsevier BV,2009

Numbers

  • LIBRIS-ID:oai:gup.ub.gu.se/96136
  • https://gup.ub.gu.se/publication/96136URI
  • https://doi.org/10.1016/j.physletb.2009.07.044DOI
  • https://research.chalmers.se/publication/96136URI
  • https://research.chalmers.se/publication/509297URI

Supplementary language notes

  • Language:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • The unbound nucleus 7He, produced in neutron-knockout reactions with a 240 MeV/u 8He beam in a liquid-hydrogen target, has been studied in an experiment at the ALADIN-LAND setup at GSI. From an R-matrix analysis the resonance parameters for 7He as well as the spectroscopic factor for the 6He(0+) + n configuration in its ground-state have been obtained. The spectroscopic factor is 0.61 confirming that 7He is not a pure single-particle state. An analysis of 5He data from neutron-knockout reactions of 6He in a carbon target reveals the presence of an s-wave component at low energies in the α+n relative energy spectrum. A possible low-lying exited state in 7He observed in neutron knockout data from 8He in a carbon target and tentatively interpreted as a Iπ=1/2− state, could not be observed in the present experiment. Possible explanations of the shape difference between the 7He resonance obtained in the two knockout reactions are discussed in terms of target-dependence or different reaction mechanisms at relativistic energies.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Johansson, Håkan T,1977Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f96hajo (author)
  • Aumann, T. (author)
  • Boretzky, K. (author)
  • Meister, Mikael,1969Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)meister (author)
  • Chatillon, A. (author)
  • Chulkov, L.V. (author)
  • Cortina-Gil, D. (author)
  • Pramanik, U. Datta (author)
  • Emling, H. (author)
  • Forssen, Christian,1974Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f2bcf (author)
  • Fynbo, H.O.U. (author)
  • Geissel, H. (author)
  • Ickert, G. (author)
  • Jonson, Björn,1941Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)bjn (author)
  • Kulessa, R. (author)
  • Langer, C. (author)
  • Lantz, Mattias,1971Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)lantzm (author)
  • LeBleis, T. (author)
  • Lindahl, Anton,1982Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg(Swepub:gu)xliant (author)
  • Mahata, K. (author)
  • Meister, Mikael (author)
  • Münzenberg, G. (author)
  • Nilsson, Thomas,1965Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)tnilsson (author)
  • Nyman, Göran Hugo,1943Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f2bgn (author)
  • Palit, R. (author)
  • Paschalis, S. (author)
  • Prokopowicz, W. (author)
  • Reifarth, R. (author)
  • Richter, A. (author)
  • Riisager, K. (author)
  • Schrieder, G. (author)
  • Simon, H. (author)
  • Sümmerer, K. (author)
  • Tengblad, Olof,1957 (author)
  • Weick, H. (author)
  • Zhukov, Mikhail,1943Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f2bmz (author)
  • Chalmers tekniska högskolaInstitutionen för fysik (GU) (creator_code:org_t)

Related titles

  • In:Physics Letters B: Elsevier BV679:3, s. 191-1960370-2693

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