Direct measurement of astrophysical factor S(E) and screening potential for Be9(p,α)

Measurement of astrophysical S-factor for 9Be(d, α 0)7Li and 9Be(d, α 1)7Li* reactions at low energies *

“…the astrophysical factor, which is a function of E c.m. in the center of mass system, W(E) [12] is the angular distribution, which is the Legendre polynomial of E, and dE/dx is the energy loss of deuterium in Beryllium calculated by the SRIM code [21].…”

“…Bertrand et al [10] only measured the cross section of the d- 9 Be reaction in the energy (Lab system) region from 300 keV to 1 MeV; Annegarn et al [11] found an energy level of 11 B at 16.43 MeV from the excitation function of the d- 9 Be reaction. Only Yan's work [12] reported on the cross section and angular distribution of the d- 9 Be reaction in the energy region from 69 to 132 keV; some of the results of angular distribution showed significant anisotropy. Then, they used the distorted wave Born approximation calculations to fit this anisotropy, which was modified by the additional short-range term [12].…”

“…Only Yan's work [12] reported on the cross section and angular distribution of the d- 9 Be reaction in the energy region from 69 to 132 keV; some of the results of angular distribution showed significant anisotropy. Then, they used the distorted wave Born approximation calculations to fit this anisotropy, which was modified by the additional short-range term [12]. However, the energy step that they selected was so large (∆E = 15 keV) that it resulted in inevitable errors in the calculations of effective energy and S(E).…”