Other
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009phrvc..80c4316d&link_type=abstract
Physical Review C, vol. 80, Issue 3, id. 034316
Other
9
Beta Decay, Double Beta Decay, Electron And Muon Capture, Stellar Helium Burning, 6&Lt, =A&Lt, =19, Beta Decay, Double Beta Decay, Electron And Muon Capture, Stellar Helium Burning, 6<=A<=19
Scientific paper
The triple-α-particle breakup of states in the triple-α continuum of C12 has been investigated by way of coincident detection of all three α particles of the breakup. The states have been fed in the β decay of N12 and B12, and the α particles measured using a setup that covers all of the triple-α phase space. Contributions from the breakup through the Be8(0+) ground state as well as other channels—interpreted as breakup through excited energies in Be8—have been identified. Spins and parities of C12 triple-α continuum states are deduced from the measured phase-space distributions for breakup through Be8 above the ground state by comparison to a fully symmetrized sequential R-matrix description of the breakup. At around 10 MeV in C12, the breakup is found to be dominated by 0+ strength breaking up through the ghost of the Be8(0+) ground state with L=0 angular momentum between the first emitted α particle and the intermediate Be8 nucleus. For C12 energies above the 12.7 MeV 1+ state, however, L=2 breakup of a C12 2+ state through the Be8(2+) excited state dominates. Furthermore, the possibility of a 2+ excited state in the 9-12 MeV region of C12 is investigated.
Äystö Juha
Barker F. C.
Borge Maria J. G.
Boutami R.
Dendooven Peter
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