Asymptotic normalization coefficient for <sup>8</sup> Be→ <sup>7</sup> Li+p from the <sup>7</sup> Li( <sup>3</sup> He,d) <sup>8</sup> Be reaction and astrophysical S factor for the radiative capture <sup>7</sup> Li(p,γ) <sup>8</sup> Be reaction
Аннотация
The astrophysical S-factor of the 7 Li(p,[Formula: see text]Be reaction has been studied at low energies with including an information about asymptotic normalization coefficient for the 7 Li+p[Formula: see text]Be configuration. In order to do this, the differential cross-section of the proton transfer reaction 7 Li( 3 He,d) 8 Be at energy of 24.3[Formula: see text]MeV has been analyzed within the framework of the modified distorted wave Born approximation (MDWBA). The value of ANC for the 7 Li+p[Formula: see text]Be(0[Formula: see text], E = 0.0[Formula: see text]MeV) configuration was derived to be 58.43[Formula: see text]1.95 fm[Formula: see text]. The values of ANCs for the 7 Li+p[Formula: see text]Be(2[Formula: see text], E = 3.04[Formula: see text]MeV) configuration were extracted to be 16.67[Formula: see text] [Formula: see text] [Formula: see text]0.54[Formula: see text]fm[Formula: see text] and 9.73[Formula: see text] [Formula: see text] [Formula: see text]0.31[Formula: see text]fm[Formula: see text] for total angular momentum [Formula: see text] and [Formula: see text], respectively. These ANC values were used in estimating the astrophysical [Formula: see text] factor of proton radiative capture by the 7 Li nucleus at astrophysically relevant energies within the framework of the modified R-matrix method. The value of the total astrophysical S factor of the 7 Li(p,[Formula: see text]Be reaction at zero energy was found to be [Formula: see text] = 1.35[Formula: see text]keV b. The reaction rate of the 7 Li(p,[Formula: see text]Be process was calculated over the relevant temperature range of astrophysical interest.