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arXiv · 1407.4678

Measurement of the 10 keV resonance in the $^{10}$B($p, \alpha_0$)$^7$Be reaction via the Trojan Horse Method

C. Spitaleri·L. Lamia·S. M. R. Puglia·S. Romano·M. La Cognata·V. Crucilla·R. G. Pizzone·G. G. Rapisarda·M. L. Sergi·M. Gimenez Del Santo·N. Carlin·M. G. Munhoz·F. A. Souza·A. Szanto de Toledo·A. Tumino·B. Irgaziev·A. Mukhamedzhanov·G. Tabacaru·V. Burjan·V. Kroha·Z. Hons·J. Mrazek·Shu-Hua Zhou·Chengbo Li·Qungang Wen·Y. Wakabayashi·H. Yamaguchi
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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.

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C. Spitaleri, L. Lamia, S. M. R. Puglia, S. Romano, M. La Cognata, V. Crucilla, R. G. Pizzone, G. G. Rapisarda, M. L. Sergi, M. Gimenez Del Santo, N. Carlin, M. G. Munhoz, F. A. Souza, A. Szanto de Toledo, A. Tumino, B. Irgaziev, A. Mukhamedzhanov, G. Tabacaru, V. Burjan, V. Kroha, Z. Hons, J. Mrazek, Shu-Hua Zhou, Chengbo Li, Qungang Wen, Y. Wakabayashi, H. Yamaguchi. 2014-07-17. Measurement of the 10 keV resonance in the $^{10}$B($p, \alpha_0$)$^7$Be reaction via the Trojan Horse Method. https://doi.org/10.1103/physrevc.90.035801

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