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Branching ratios in the beta decays of N-12 and B-12

S. Hyldegaard ; C. A. Diget ; M. J. G. Borge ; R. Boutami ; P. Dendooven ; T. Eronen ; S. P. Fox ; L. M. Fraile ; B. R. Fulton ; H. O. U. Fynbo ; J. Huikari ; H. B. Jeppesen ; A. S. Jokinen ; Björn Jonson (Institutionen för fundamental fysik, Subatomär fysik) ; A. Kankainen ; I. Moore ; Göran Nyman (Institutionen för fundamental fysik, Subatomär fysik) ; H. Penttila ; K. Perajarvi ; K. Riisager ; S. Rinta-Antila ; Olof Tengblad ; Y. Wang ; Katarina Wilhelmsen (Institutionen för fundamental fysik, Subatomär fysik) ; J. Aysto
Physical Review C (0556-2813). Vol. 80 (2009), 4, p. -.
[Artikel, refereegranskad vetenskaplig]

Absolute branching ratios to unbound states in C-12 populated in the beta decays of N-12 and B-12 are reported. Clean sources of N-12 and B-12 were obtained using the isotope separation on-line (ISOL) method. The relative branching ratios to the different populated states were extracted using single-alpha as well as complete kinematics triple-alpha spectra. These two largely independent methods give consistent results. Absolute normalization is achieved via the precisely known absolute branching ratio to the bound 4.44 MeV state in C-12. The extracted branching ratios to the unbound states are a factor of three more precise than previous measurements. Branching ratios in the decay of Na-20 are also extracted and used to check the results.

Nyckelord: alpha-particles, c-12, b12, n12, state

Denna post skapades 2009-12-17.
CPL Pubid: 104039


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


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