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APS » Journals » Phys. Rev. Lett. » Volume 101 » Issue 15
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Phys. Rev. Lett. 101, 152501 (2008) [4 pages]

Measurement of the 20 and 90 keV Resonances in the 18O(p,α)15N Reaction via the Trojan Horse Method

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M. La Cognata1, C. Spitaleri1,*, A. M. Mukhamedzhanov2, B. Irgaziev3, R. E. Tribble2, A. Banu2, S. Cherubini1, A. Coc4, V. Crucillà1, V. Z. Goldberg2, M. Gulino1, G. G. Kiss5, L. Lamia1, J. Mrazek6, R. G. Pizzone1, S. M. R. Puglia1, G. G. Rapisarda1, S. Romano1, M. L. Sergi1, G. Tabacaru2, L. Trache2, W. Trzaska7, and A. Tumino1
1INFN Laboratori Nazionali del Sud & DMFCI Università di Catania, 95123 Catania, Italy
2Cyclotron Institute, Texas A&M University, College Station, 77843 Texas, USA
3GIK Institute of Engineering Sciences and Technology, Topi (23640), NWFP Pakistan
4CSNSM, CNRS/IN2P3 Universitè Paris Sud, F-91405 Orsay, France
5ATOMKI, H-4001 Debrecen, Hungary
6Nuclear Physics Institute of ASCR, 25068 Rez near Prague, Czech Republic
7Physics Department, University of Jyväskylä, FIN-40014 Jyväskylä, Finland

Received 13 June 2008; published 7 October 2008

The 18O(p,α)15N reaction is of primary importance in several astrophysical scenarios, including fluorine nucleosynthesis inside asymptotic giant branch stars as well as oxygen and nitrogen isotopic ratios in meteorite grains. Thus the indirect measurement of the low energy region of the 18O(p,α)15N reaction has been performed to reduce the nuclear uncertainty on theoretical predictions. In particular the strength of the 20 and 90 keV resonances has been deduced and the change in the reaction rate evaluated.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.152501
DOI:
10.1103/PhysRevLett.101.152501
PACS:
24.10.−i, 25.40.Hs, 26.20.−f, 27.20.+n

*Spitaleri@lns.infn.it

 
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