Measurement of the 10 keV resonance in the ${}^{10}$B($p,{\alpha }_0$)${}^7$Be reaction via the Trojan Horse Method

Abstract

The ${}^{10}$B(p,${\alpha }_0$)${}^7$Be bare nucleus astrophysical S(E)-factor has been measured for the first time at energies from about 100 keV down to about 5 keV by means of the Trojan Horse Method (THM). In this energy region, the S(E)-factor is strongly dominated by the 8.699 MeV ${}^{11}$C level (J${}^{\pi }$=$\frac{5}{2}$${}^{+}$), producing an s-wave resonance centered at about 10 keV in the entrance channel. Up to now, only the high energy tail of this resonant has been measured, while the low-energy trend is extrapolated from the available direct data. The THM has been applied to the quasi-free ${}^2$H(${}^{10}$B,${\alpha }_0$${}^7$Be)n reaction induced at a boron-beam energy of 24.5 MeV. An accurate analysis brings to the determination of the ${}^{10}$B(p,${\alpha }_0$)${}^7$Be S(E)-factor and of the corresponding electron screening potential $U_e$, thus giving for the first time an independent evaluation of it.

arXiv commentAuthors thank the (anonymous) referee for detailed comments and suggestions. The paper is already submitted to Physical Review C

References in corpus (8)

• Theory of the Trojan-Horse Method
• Measurement of the 20 and 90 keV resonances in the ${}^{18}\mathrm{O}(p,\alpha ){}^{15}$N reaction via THM
• Trojan Horse as an indirect technique in nuclear astrophysics. Resonance reactions
• Boron Depletion in F and G Dwarf Stars and the Beryllium-Boron Correlation
• Suppression of the centrifugal barrier effects in the off-energy-shell neutron+${}^{17}$O interaction
• Updated evidences of the Trojan Horse particle invariance for ${}^2$H(d,p)${}^3$H reaction
• Theory of deuteron stripping. From surface integrals to generalized $R$-matrix approach
• Astrophysical Reaction Rates for ${}^{10}$B(p,$\alpha$)${}^7$Be and ${}^{11}$B(p,$\alpha$)${}^8$Be From a Direct Model

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