A multi-channel model for an α plus 6He nucleus cluster

. A multi-channel algebraic scattering (MCAS) method has been used to solve coupled sets of Lippmann-Schwinger equations for the α + 6 He cluster system, so finding a model spectrum for 10 Be to more than 10MeV excitation. Three states of 6 He were included and the resonance character of the two exc...

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Veröffentlicht in:The European physical journal. A, Hadrons and nuclei Hadrons and nuclei, 2017, Vol.53 (4), p.1-11
Hauptverfasser: Amos, K., Canton, L., Fraser, P. R., Karataglidis, S., Svenne, J. P., van der Knijff, D.
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Sprache:eng
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Zusammenfassung:. A multi-channel algebraic scattering (MCAS) method has been used to solve coupled sets of Lippmann-Schwinger equations for the α + 6 He cluster system, so finding a model spectrum for 10 Be to more than 10MeV excitation. Three states of 6 He 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 10 Be . 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 6 He - α 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 6 He , assuming values for their spin-parities, leads to an enlarged spectrum for 10 Be in which the number and distribution of resonances show similarity to the known spectrum.
ISSN:1434-6001
1434-601X
DOI:10.1140/epja/i2017-12270-1