Toward correction-free 8Li(α, n)11B data at the Gamow energy of explosive nucleosynthesis
The 8Li+4He -> 11B+n reaction inside the center-of-mass energy region Ecm = 0.5--2.5 MeV, corresponding to the temperature range T9 = 1--5, is of relevant interest in the fields of nuclear cosmology and nuclear astrophysics. In the context of Big Bang nucleosynthesis, it has been invoked to overc...
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| Veröffentlicht in: | Journal of physics. G, Nuclear and particle physics Nuclear and particle physics, 2010-10, Vol.37 (10), p.105105-105105 |
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| creator | Cognata, M La Zoppo, A Del Alba, R Cherubini, S Colonna, N Pietro, A Di Figuera, P Gulino, M Lamia, L Musumarra, A Pellegriti, M G Pizzone, R G Rolfs, C Romano, S Spitaleri, C Tumino, A |
| description | The 8Li+4He -> 11B+n reaction inside the center-of-mass energy region Ecm = 0.5--2.5 MeV, corresponding to the temperature range T9 = 1--5, is of relevant interest in the fields of nuclear cosmology and nuclear astrophysics. In the context of Big Bang nucleosynthesis, it has been invoked to overcome the A = 8 mass gap; in r-process nucleosynthesis, it is considered a candidate precursor of seed nuclei. In this experimental work, the cross section, summed over all 11B final bound states, at the energy of 1.05 MeV in the center-of-mass system, is investigated by a correction-free projectile-correlated inclusive neutron measurement. The radioactive 8Li beam delivered by the EXCYT facility at LNS-Catania is used to induce the inverse-kinematics reaction process. A zero-energy-threshold 4 Delta *p detection system is used. Thanks to the improved experimental and analysis procedures, the result obtained in this work represents a strong argument to reopen the debate on the magnitude of the 8Li( Delta *a, n)11B reaction rate in explosive astrophysical environments. |
| doi_str_mv | 10.1088/0954-3899/37/10/105105 |
| format | Article |
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| subjects | Beams (radiation) Cosmology Cross sections Electrochemical machining Energy (nuclear) Exact sciences and technology Explosions Nuclear physics Particle physics Physics Precursors The physics of elementary particles and fields |
| title | Toward correction-free 8Li(α, n)11B data at the Gamow energy of explosive nucleosynthesis |
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