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A multi-channel model for an \( \alpha\) plus 6He nucleus cluster

  • Regular Article - Theoretical Physics
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Abstract.

A multi-channel algebraic scattering (MCAS) method has been used to solve coupled sets of Lippmann-Schwinger equations for the \( \alpha + {}^{6}{\rm He}\) cluster system, so finding a model spectrum for 10Be to more than 10MeV excitation. Three states of 6He were included and the resonance character of the two excited states taken into account in finding solutions. A model Hamiltonian has been found that gives very good agreement with the known bound states and with some low-lying resonances of 10Be . More resonance states are predicted than those which have been observed as yet. The method also yields S -matrices which we have used to evaluate low-energy 6He - \( \alpha\) scattering cross sections. Reasonable reproduction of low-energy differential cross sections and of energy variation of cross sections measured at fixed scattering angles have been found. Enlarging the channel space by including two higher energy states of 6He , assuming values for their spin-parities, leads to an enlarged spectrum for 10Be in which the number and distribution of resonances show similarity to the known spectrum.

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Authors and Affiliations

  1. School of Physics, University of Melbourne, 3010, Victoria, Australia

    K. Amos, S. Karataglidis & D. van der Knijff

  2. Department of Physics, University of Johannesburg, P.O. Box 524, 2006, Auckland Park, South Africa

    K. Amos & S. Karataglidis

  3. Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131, Padova, Italy

    L. Canton

  4. Department of Physics, Astronomy and Medical Radiation Sciences, Curtin University, GPO Box U1987, 6845, Perth, Australia

    P. R. Fraser

  5. Department of Physics and Astronomy, University of Manitoba, and Winnipeg Institute for Theoretical Physics, R3T 2N2, Winnipeg, Manitoba, Canada

    J. P. Svenne

Authors
  1. K. Amos
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  2. L. Canton
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  3. P. R. Fraser
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  4. S. Karataglidis
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  5. J. P. Svenne
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  6. D. van der Knijff
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Correspondence to K. Amos.

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Communicated by S. Hands

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Amos, K., Canton, L., Fraser, P.R. et al. A multi-channel model for an \( \alpha\) plus 6He nucleus cluster. Eur. Phys. J. A 53, 72 (2017). https://doi.org/10.1140/epja/i2017-12270-1

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  • DOI: https://doi.org/10.1140/epja/i2017-12270-1

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