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Decay path measurements for the 2.429 MeV state in 9Be: Implications for the astrophysical a+a+n reaction

Papka, P., Brown, T.A.D., Fulton, B.R., Watson, D.L., Fox, S.P., Groombridge, D., Freer, M., Clarke, N.M., Ashwood, N.I., Curtis, N., Ziman, V., McEwan, P., Ahmed, S., Catford, W.N., Mahboub, D., Timis, C.N., Baldwin, T.D. and Weisser, D.C. (2007) Decay path measurements for the 2.429 MeV state in 9Be: Implications for the astrophysical a+a+n reaction. Physical Review C, 75 (4). 045803-1-045803-8. ISSN 1089-490X

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An experiment was performed at the Australian National University to study the 9Be(6Li,6Li)9Be*++n reaction. This experiment was designed to study the breakup of 9Be, in an attempt to quantify the contribution played by the 5He+ and 8Be2++n channels for the low lying excited states. This information is required in order to resolve uncertainties in the ++n 9Be reaction rate in high-energy and neutron-rich astrophysical environments such as supernovae. Angular correlation measurements have been used to deduce that the 2.429 MeV state breaks up almost exclusively via the 8Be2+ channel. This method of identifying the break-up channel resolves the problem of distinguishing between the 8Be2+ and 5Heg.s. channels which are kinetically identical at this excitation energy.

Item Type: Article
Institution: The University of York
Academic Units: The University of York > Physics (York)
Depositing User: York RAE Import
Date Deposited: 26 Feb 2009 15:05
Last Modified: 26 Feb 2009 15:05
Published Version: http://dx.doi.org/10.1103/PhysRevC.75.045803
Status: Published
Publisher: The American Physical Society.
Refereed: Yes
Identification Number: 10.1103/PhysRevC.75.045803
URI: http://eprints.whiterose.ac.uk/id/eprint/7304

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