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APS » Journals » Phys. Rev. Lett. » Volume 91 » Issue 8
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Phys. Rev. Lett. 91, 082502 (2003) [4 pages]

Clarification of the Three-Body Decay of 12C (12.71 MeV)

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H. O. U. Fynbo1,*, Y. Prezado2, U. C. Bergmann3, M. J. G. Borge2, P. Dendooven4, W. X. Huang4, J. Huikari4, H. Jeppesen1, P. Jones4, B. Jonson5, M. Meister5, G. Nyman5, K. Riisager1, O. Tengblad2, I. S. Vogelius1, Y. Wang4, L. Weissman3, K. Wilhelmsen Rolander6, and J. Äystö4
1Institut for Fysik og Astronomi, Aarhus Universitet, DK-8000 Aarhus C, Denmark
2Instituto Estructura de la Materia, CSIC, Serrano 113bis, E-28006 Madrid, Spain
3EP Division, CERN, CH-1211 Genève 23, Switzerland
4Department of Physics, University of Jyväskylä, FIN-40351 Jyväskylä, Finland
5Experimentell Fysik, Chalmers Tekniska Högskola och Göteborgs Universitet, S-412 96 Göteborg, Sweden
6Fysiska Institutionen, Stockholms Universitet, Box 6730, S-113 85 Stockholm, Sweden

Received 15 April 2003; published 21 August 2003

Using β decays of a clean source of 12N produced at the IGISOL facility, we have measured the breakup of the 12C (12.71 MeV) state into three α particles with a segmented particle detector setup. The high quality of the data permits solving the question of the breakup mechanism of the 12.71 MeV state, a longstanding problem in few-body nuclear physics. Among existing models, a modified sequential model fits the data best, but systematic deviations indicate that a three-body description is needed.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.082502
DOI:
10.1103/PhysRevLett.91.082502
PACS:
21.45.+v, 23.40.–s, 27.20.+n

*Electronic address: fynbo@phys.au.dk

 
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