F-19 experimental abundances is overestimated in respect to the theoretical one: it is therefore clear that further investigations are needed. We focused on the F-19(alpha, p)Ne-22 reaction, representing the main destruction channel in He-rich environments. The lowest energy at which this reaction has been studied with direct methods is E-C.M. approximate to 0.91 MeV, while the Gamow region is between 0.39 divided by 0.8 MeV, far below the Coulomb barrier (3.8 MeV). For this reason, an experiment at Rudjer Boskovic Institut (Zagreb) was performed, applying the Trojan Horse Method. Following this method we selected the quasi-free contribution coming from Li-6(F-19,p(22)Ne)H-2 at E-beam=6 MeV at kinematically favourable angles, and the cross section at energies 0 < E-C.M. < 1.4 MeV was extracted in arbitrary units, covering the astrophysical region of interest.

First evidences for 19F(α, p)22Ne at astrophysical energies

D'Agata G
;
SPITALERI, Claudio;Figuera P.;GRASSI, LAURA;Guardo G. L.;HAYAKAWA, SEIYA;INDELICATO, IOLANDA;La Cognata M.;Lamia L;Lattuada M.;Sergi M. L.;
2016-01-01

Abstract

F-19 experimental abundances is overestimated in respect to the theoretical one: it is therefore clear that further investigations are needed. We focused on the F-19(alpha, p)Ne-22 reaction, representing the main destruction channel in He-rich environments. The lowest energy at which this reaction has been studied with direct methods is E-C.M. approximate to 0.91 MeV, while the Gamow region is between 0.39 divided by 0.8 MeV, far below the Coulomb barrier (3.8 MeV). For this reason, an experiment at Rudjer Boskovic Institut (Zagreb) was performed, applying the Trojan Horse Method. Following this method we selected the quasi-free contribution coming from Li-6(F-19,p(22)Ne)H-2 at E-beam=6 MeV at kinematically favourable angles, and the cross section at energies 0 < E-C.M. < 1.4 MeV was extracted in arbitrary units, covering the astrophysical region of interest.
TROJAN-HORSE METHOD, NUCLEOSYNTHESIS.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/245593
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