Low-lying continuum structures in 8B and 8Li in a microscopic model

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Abstract

We search for low-lying resonances in the 8B and 8Li nuclei using a microscopic cluster model and a variational scattering method, which is analytically continued to complex energies. After fine-tuning the nucleon-nucleon interaction to get the known 1 + state of 8B at the right energy, we reproduce the known spectra of the studied nuclei. In addition, our model predicts a 1 + state at 1.3 MeV in 8B, relative to the 7Be + p threshold, whose corresponding pair is situated right at the 7Li+n threshold in 8Li. Lacking any experimental evidence for the existence of such states, it is presently uncertain whether these structures really exist or whether they are spurious resonances in our model. We demonstrate that the predicted state in 8B, if it exists, would have important consequences for the understanding of the astrophysically important 7Be(p, γ)8B reaction.

Original languageEnglish
Article number024311
Pages (from-to)243111-243115
Number of pages5
JournalPhysical Review C - Nuclear Physics
Volume61
Issue number2
Publication statusPublished - Feb 2000

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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