Revised rates for the stellar triple-α process from measurement of 12C nuclear resonances

Hans O. U. Fynbo (), Christian Aa. Diget, Uffe C. Bergmann, Maria J. G. Borge, Joakim Cederkäll, Peter Dendooven, Luis M. Fraile, Serge Franchoo, Valentin N. Fedosseev, Brian R. Fulton, Wenxue Huang, Jussi Huikari, Henrik B. Jeppesen, Ari S. Jokinen, Peter Jones, Björn Jonson, Ulli Köster, Karlheinz Langanke, Mikael Meister, Thomas Nilsson, Göran Nyman, Yolanda Prezado, Karsten Riisager, Sami Rinta-Antila, Olof Tengblad, Manuela Turrion, Youbao Wang, Leonid Weissman, Katarina Wilhelmsen, Juha Äystö and The ISOLDE Collaboration
Additional contact information
Hans O. U. Fynbo: University of Aarhus
Christian Aa. Diget: University of Aarhus
Uffe C. Bergmann: CERN
Maria J. G. Borge: Instituto Estructura de la Materia, CSIC, Serrano 113bis
Joakim Cederkäll: CERN
Peter Dendooven: KVI, Zernikelaan
Luis M. Fraile: CERN
Serge Franchoo: CERN
Valentin N. Fedosseev: CERN
Brian R. Fulton: University of York
Wenxue Huang: University of Jyväskylä
Jussi Huikari: University of Jyväskylä
Henrik B. Jeppesen: University of Aarhus
Ari S. Jokinen: University of Jyväskylä
Peter Jones: University of Jyväskylä
Björn Jonson: Experimental Physics, Chalmers University of Technology and Göteborg University
Ulli Köster: CERN
Karlheinz Langanke: University of Aarhus
Mikael Meister: Experimental Physics, Chalmers University of Technology and Göteborg University
Thomas Nilsson: CERN
Göran Nyman: Experimental Physics, Chalmers University of Technology and Göteborg University
Yolanda Prezado: Instituto Estructura de la Materia, CSIC, Serrano 113bis
Karsten Riisager: University of Aarhus
Sami Rinta-Antila: University of Jyväskylä
Olof Tengblad: Instituto Estructura de la Materia, CSIC, Serrano 113bis
Manuela Turrion: Instituto Estructura de la Materia, CSIC, Serrano 113bis
Youbao Wang: University of Jyväskylä
Leonid Weissman: CERN
Katarina Wilhelmsen: Experimental Physics, Chalmers University of Technology and Göteborg University
Juha Äystö: University of Jyväskylä
The ISOLDE Collaboration: CERN

Nature, 2005, vol. 433, issue 7022, 136-139

Abstract: Stellar performance In 1953 Fred Hoyle predicted that in the extreme conditions prevailing in the centre of stars, three α-particles (helium nuclei) can combine to form an excited form of carbon-12. This type of stellar nucleosynthesis is now recognized as the source of heavy elements in the Universe. Surprisingly there is still considerable uncertainty about the nature of the reaction that produces carbon-12. Fynbo et al. have now obtained a much more accurate measure of the reaction rate for carbon-12 synthesis than previously available, by measuring the reverse reaction rate. At temperatures found in young stars the new reaction rate is roughly twice the previous value, but at the 109 K found in supernovae, nucleosynthesis is much slower than was thought.

Date: 2005
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DOI: 10.1038/nature03219

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