Asymptotic normalization coefficients (nuclear vertex constants) for p + 7Be → 8B and the direct 7Be(p, γ)8B astrophysical S factors at solar energies

Asymptotic normalization coefficients for Be7+p→B8 from the peripheral Tojiboev1, Yarmukhamedov2, Artemov3 et al. 2016Phys. Rev. CSelf Cite14150View full textAdd to dashboardCite

“…It is seen from Table 3, the CN and CCE contributions change the ANC values about 4% and the overall uncertainty for the derived ANCs is about 7%, whereas the theoretical and experimental ones are about 3.5% and 6.1%, respectively, i.e., the experimental uncertainty is fairly larger (a factor about 1.7) than the theoretical one. The ANC value recommended in the present work is C Table 4 together with those obtained by the other authors in [10,16,20,24,[46][47][48][49][50]. As is seen from Table 4, the weighted mean value of C 2 B , obtained in the present work, is in excellent agreement with that of [10], which was derived from the independent analysis of the experimental 7 Be(p, γ) 8 B astrophysical S factors at extremely low energies.…”

“…The ANC value recommended in the present work is C Table 4 together with those obtained by the other authors in [10,16,20,24,[46][47][48][49][50]. As is seen from Table 4, the weighted mean value of C 2 B , obtained in the present work, is in excellent agreement with that of [10], which was derived from the independent analysis of the experimental 7 Be(p, γ) 8 B astrophysical S factors at extremely low energies. However, the obtained value for C 2 B differs noticeably from that recommended in [16,24,46,47].…”

“…Nevertheless, in [16] the obtained ANC values were then used for the estimation of S 17 (0), which also differs noticeably from that recommended in [8,10,21]. As is noted in [10,20], one of the main reasons of the observed discrepancy is connected with underestimated values of the ANCs suggested in [16] as compared with that obtained in [10,20].…”

“…[10]). As regards the theoretical microscopic calculations of S 17 (0), they also show considerable spread connected with the method used (see, for example, Refs.…”

“…In [10], the "indirectly determined" value of ANCs for 7 Be + p → 8 B were obtained by means of the analysis of the precisely measured experimental astrophysical S factors (S exp 17 (E)) performed within the modified two-body potential approach (MTBPA) [15] where S 17 (E) for the direct radiative capture 7 Be(p, γ) 8 B reaction is expressed in terms of ANC for p + 7 Be → 8 B. Then the derived ANC was used for extrapolation of the corresponding astrophysical S factors to solar energies.…”