Coupled-channel calculation of bound and resonant spectra of 9Be and 13C hypernuclei

L. Canton, K. Amos, S. Karataglidis, J. P. Svenne

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2 Citations (Scopus)


A multi-channel algebraic scattering (MCAS) approach has been used to analyze the spectra of two hypernuclear systems, 9Be and 13 C$. The splitting of the two odd-parity excited levels (1/2- and 3/2-) at 11 MeV excitation in 13Λ C is driven mainly by the weak Λ-nucleus spinorbit force, but the splittings of the 3/2+ and 5/2+ levels in both 9ΛBe and 13ΛC have a different origin. These cases appear to be dominated by coupling to the collective 2+ states of the core nuclei. Using simple phenomenological potentials as input to the MCAS method, the observed splitting and level ordering in 9ΛBe is reproduced with the addition of a weak spinspin interaction acting between the hyperon and the spin of the excited target. With no such spinspin interaction, the level ordering in 9ΛBe is inverted with respect to that currently observed. In both hypernuclei, our calculations suggest that there are additional low-lying resonant states in the Λ-nucleus continua.

Original languageEnglish
Pages (from-to)1435-1450
Number of pages16
JournalInternational Journal of Modern Physics E
Issue number7
Publication statusPublished - Jul 2010
Externally publishedYes


  • Hypernuclei
  • coupledchannel methods
  • shell model
  • spin-orbit
  • spinspin interactions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • General Physics and Astronomy


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