1. Search for resonant states in $^{10}$C and $^{11}$C and their impact on the primordial $^{7}$Li abundance
- Author
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L. Lefebvre, Predrag Ujić, J. Kiener, J. Mrazek, André Palma da Cunha Matta, B. Fernández-Domínguez, A. Coc, A. M. Sánchez-Benítez, I. Stefan, P. Morfouace, Didier Beaumel, Daisuke Suzuki, I. Matea, S. Franchoo, B. Le Crom, M. Assié, A. Lefebvre-Schuhl, N. de Sereville, F. Hammache, F. de Oliveira Santos, L. Audouin, G. Mavilla, Vincent Tatischeff, Anuj Parikh, C. Hamadache, Marine Vandebrouck, L. Perrot, Alison Laird, S. P. Fox, P. Roussel, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Nuclear reaction ,Physics ,History ,010308 nuclear & particles physics ,Primordial 7Li ,Resonant states ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,7. Clean energy ,01 natural sciences ,Cosmology ,Computer Science Applications ,Education ,Nuclear physics ,Helium-4 ,Nucleosynthesis ,Helium-3 ,0103 physical sciences ,Isotopes of beryllium ,010303 astronomy & astrophysics ,Isotopes of helium ,Radioactive decay ,7Li abundance - Abstract
The cosmological 7Li problem arises from the signi cant discrepancy of about a factor 3 between the predicted primordial 7Li abundance and the observed one. The main process for the production of 7Li during Big-Bang nucleosynthesis is the decay of 7Be. Many key nuclear reactions involved in the production and destruction of 7Be were investigated in attempt to explain the 7Li de cit but none of them led to successful conclusions. However, some authors suggested recently the possibility that the destruction of 7Be by 3He and 4He may reconcile the predictions and observations if missing resonant states in the compound nuclei 10C and 11C exist. Hence, a search of these missing resonant states in 10C and 11C was investigated at the Orsay Tandem-Alto facility through 10B(3He,t)10C and 11B(3He,t)11C charge-exchange reactions respectively. After a short overview of the cosmological 7Li problem from a nuclear physics point of view, a description of the Orsay experiment will be given as well as the obtained results and their impact on the 7Li problem.
- Published
- 2015