Measurement of the 10 keV resonance in the 10B(p, α0)7Be reaction via the Trojan Horse Method

Spitaleri, C. and Lamia, L. and Puglia, S. M. R. and Romano, S. and La Cognata, M. and Crucillà, V. and Pizzone, R. G. and Rapisarda, G. G. and Sergi, M. L. and Del Santo, M. G. and Carlin, N. and Munhoz, M. G. and Souza, F. A. and Szanto, De Toledo A. and Tumino, A. and Irgaziev, B. and Mukhamedzhanov, A. and Tabacaru, G. and Burjan, V. and Kroha, V. and Hons, Z. and Mrazek, J. and Zhou, S. -H. and Li, C. and Wen, Q. and Wakabayashi, Y. and Yamaguchi, H. and Somorjai, Endre (2014) Measurement of the 10 keV resonance in the 10B(p, α0)7Be reaction via the Trojan Horse Method. PHYSICAL REVIEW C, 90 (3). ISSN 2469-9985

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Abstract

The 10B(p,α0)7Be 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 11C level (Jπ = 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 2H(10B,α07Be)n reaction induced at a boron-beam energy of 24.5 MeV. An accurate analysis brings to the determination of the 10B(p,α0)7Be S(E)-factor and of the corresponding electron screening potential Ue, thus giving for the first time an independent evaluation of it.

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