The Trojan Horse Method is a powerful indirect technique allowing one to measure the bare nucleus... more The Trojan Horse Method is a powerful indirect technique allowing one to measure the bare nucleus S(E)-factor and the electron screening potential for astrophysically relevant reactions without the needs of extrapolations. The case of the (p,α) reactions induced on the two boron isotopes 10,11 B is here discussed in view of the recent Trojan Horse (TH) applications to the quasi-free 10,11 B + 2 H reactions. The comparison between the TH and the low-energy direct data allowed us to determine the electron screening potential for the 11 B(p,α) reaction, while preliminary results on the 10 B(p,α) reaction have been extracted. The work published in J. Phys.: Conf. Ser. 436 012075 (2013).
... For that purpose, we developed the ΔE-E telescope to cover larger solid-angle acceptances and... more ... For that purpose, we developed the ΔE-E telescope to cover larger solid-angle acceptances and increased the telescopes by four times in the experimental setup. In this report, we first describe the experimental setup for the γ-ray and proton measurements in sect. ...
The 18 O(p, α) 15 N and 17 O(p, α) 14 N reactions are of primary importance in several astrophysi... more The 18 O(p, α) 15 N and 17 O(p, α) 14 N reactions are of primary importance in several astrophysical scenarios, including nucleosynthesis inside Asymptotic Giant Branch stars and oxygen and nitrogen isotopic ratios in meteorite grains. They are also key reactions to understand exotic systems such as R-Coronae Borealis stars and novae. Thus, the measurement of their cross sections in the low energy region can be crucial to reduce the nuclear uncertainty on theoretical predictions, because the resonance parameters are poorly determined. The Trojan Horse Method, in its newly developed form particularly suited to investigate low-energy resonances, has been applied to the 2 H( 18 O, α 15 N)n and 2 H( 17 O, α 14 N)n reactions to deduce the 18 O(p, α) 15 N and 17 O(p, α) 14 N cross sections at low energies. Resonances in the 18 O(p, α) 15 N and 17 O(p, α) 14 N excitation functions have been studied and the resonance parameters deduced.
The Trojan Horse Method is a powerful indirect technique allowing one to measure the bare nucleus... more The Trojan Horse Method is a powerful indirect technique allowing one to measure the bare nucleus S(E)-factor and the electron screening potential for astrophysically relevant reactions without the needs of extrapolations. The case of the (p,α) reactions induced on the two boron isotopes 10,11 B is here discussed in view of the recent Trojan Horse (TH) applications to the quasi-free 10,11 B + 2 H reactions. The comparison between the TH and the low-energy direct data allowed us to determine the electron screening potential for the 11 B(p,α) reaction, while preliminary results on the 10 B(p,α) reaction have been extracted. The work published in J. Phys.: Conf. Ser. 436 012075 (2013).
... For that purpose, we developed the ΔE-E telescope to cover larger solid-angle acceptances and... more ... For that purpose, we developed the ΔE-E telescope to cover larger solid-angle acceptances and increased the telescopes by four times in the experimental setup. In this report, we first describe the experimental setup for the γ-ray and proton measurements in sect. ...
The 18 O(p, α) 15 N and 17 O(p, α) 14 N reactions are of primary importance in several astrophysi... more The 18 O(p, α) 15 N and 17 O(p, α) 14 N reactions are of primary importance in several astrophysical scenarios, including nucleosynthesis inside Asymptotic Giant Branch stars and oxygen and nitrogen isotopic ratios in meteorite grains. They are also key reactions to understand exotic systems such as R-Coronae Borealis stars and novae. Thus, the measurement of their cross sections in the low energy region can be crucial to reduce the nuclear uncertainty on theoretical predictions, because the resonance parameters are poorly determined. The Trojan Horse Method, in its newly developed form particularly suited to investigate low-energy resonances, has been applied to the 2 H( 18 O, α 15 N)n and 2 H( 17 O, α 14 N)n reactions to deduce the 18 O(p, α) 15 N and 17 O(p, α) 14 N cross sections at low energies. Resonances in the 18 O(p, α) 15 N and 17 O(p, α) 14 N excitation functions have been studied and the resonance parameters deduced.
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Papers by Shigeru Kubono