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Multiple particle break-up study of low excited states in Be-9: The ghost peak in the Be-8 excitation energy spectrum visited

M. Madurga ; M. J. G. Borge ; H. O. U. Fynbo ; Björn Jonson (Institutionen för fundamental fysik, Subatomär fysik) ; Göran Nyman (Institutionen för fundamental fysik, Subatomär fysik) ; Y. Prezado ; K. Riisager ; Olof Tengblad (Institutionen för fundamental fysik, Subatomär fysik)
European Physical Journal-Special Topics (1951-6355). Vol. 150 (2007), p. 137-138.
[Artikel, refereegranskad vetenskaplig]

The aim of this work is to find out the origin of the anomalous resonance in Be-8 seen in the reactions through excited states in Be-9. We have populated the Be-9 excited states by beta-decay of Li-9. Energy and direction of the two alpha particles has been detected and the neutron spectra reconstructed. In our work we identified the "anomalous resonance" in Be-8 observed in several reaction studies as coming from the decay of the 2.43 and 2.78 MeV states in Be-9. This anomalous resonance appears when the two detected alpha particles are assumed to form a resonance in Be-8. We argued that the main decaying channels for these two levels in Be-9 do not involve Be-8.



Denna post skapades 2008-11-18.
CPL Pubid: 78254

 

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Institutioner (Chalmers)

Institutionen för fundamental fysik, Subatomär fysik (2005-2013)

Ämnesområden

Fysik

Chalmers infrastruktur