The observation of neutrinos emitted in the p chain and in the CNO cycle can be employed to test the Standard Solar Model. The He-3(alpha,gamma)(7) Be reaction is the first reaction of the 2nd and 3rd branch of the p-p chain, so the indetermination of its cross section significantly affects the predicted Be-7 and (8) B neutrino fluxes. Notwithstanding its relevance and the great deal of experimental and theoretical papers, information of the reaction cross section at energies of the core of the Sun (15 keV - 30 keV) is sparse and additional experimental work is necessary to attain the target (similar to 3%) accuracy. The precise understanding of the external capture component to the 3 He(alpha,gamma)(7) Be reaction cross section is pivotal for the theoretical assessment of the reaction mechanism. In this work, the indirect measurement of this external capture
Determination of the astrophysical factor of the 3He(α,γ)7Be down to zero energy using the asymptotic normalization coefficient method
Gulino, M.;Spartà, R.;Tumino, A.;
2023-01-01
Abstract
The observation of neutrinos emitted in the p chain and in the CNO cycle can be employed to test the Standard Solar Model. The He-3(alpha,gamma)(7) Be reaction is the first reaction of the 2nd and 3rd branch of the p-p chain, so the indetermination of its cross section significantly affects the predicted Be-7 and (8) B neutrino fluxes. Notwithstanding its relevance and the great deal of experimental and theoretical papers, information of the reaction cross section at energies of the core of the Sun (15 keV - 30 keV) is sparse and additional experimental work is necessary to attain the target (similar to 3%) accuracy. The precise understanding of the external capture component to the 3 He(alpha,gamma)(7) Be reaction cross section is pivotal for the theoretical assessment of the reaction mechanism. In this work, the indirect measurement of this external captureI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
