R-matrix analysis of the beta decays of N-12 and B-12 - INSPIRE

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R-matrix analysis of the beta decays of N-12 and B-12

S. Hyldegaard
(
- Aarhus U.
)
,
M. Alcorta
(
- Madrid, Inst. Estructura Materia
)
,
B. Bastin
(
- Leuven U.
)
,
M.J.G. Borge
(
- Madrid, Inst. Estructura Materia
)
,
R. Boutami
(
- Madrid, Inst. Estructura Materia
)

Feb, 2010

10 pages

Published in:

Phys.Rev.C 81 (2010) 024303

DOI:

10.1103/PhysRevC.81.024303

View in:

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Abstract: (APS)

The β decays of N12 and B12 have been studied at KVI and JYFL to resolve the composition of the broad and interfering 0+ and 2+ strengths in the triple-α continuum. For the first time a complete treatment of 3α decay is presented including all major breakup channels. A multilevel, many-channel R-matrix formalism has been developed for the complete description of the breakup in combination with the recently published separate analysis of angular correlations. We find that, in addition to the Hoyle state at 7.65 MeV, more than one 0+ and 2+ state is needed to reproduce the spectra. Broad 03+ and 22+ states are found between 10.5 and 12 MeV in this work. The presence of β strength up to the N12 Q-value window suggests the presence of additional 0+ and 2+ components in the C12 structure at energies above 12.7 MeV.

27.20.+n
23.40.-s

References(34)

Figures(0)

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