Determination of the astrophysical factor of the 3He(α, γ)7Be down to zero energy using the asymptotic normalization coefficient method

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F23%3A00577228" target="_blank" >RIV/61389005:_____/23:00577228 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1088/1742-6596/2586/1/012093" target="_blank" >https://doi.org/10.1088/1742-6596/2586/1/012093</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/2586/1/012093" target="_blank" >10.1088/1742-6596/2586/1/012093</a>

Result language

angličtina

Original language name

Determination of the astrophysical factor of the 3He(α, γ)7Be down to zero energy using the asymptotic normalization coefficient method

Original language description

The observation of neutrinos emitted in the p − p chain and in the CNO cycle can be employed to test the Standard Solar Model. The 3He(α,γ)7Be 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 7Be and 8B 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 (~ 3%) accuracy. The precise understanding of the external capture component to the 3He(α,γ)7Be reaction cross section is pivotal for the theoretical assessment of the reaction mechanism. In this work, the indirect measurement of this external capture component using the Asymptotic Normalization Coefficient (ANC) technique is discussed. To extract the ANC, the angular distributions of deuterons yielded in the 6Li(3He,d)7Be α-transfer reaction were detected with high precision at E3He=3.0 MeV and 5.0 MeV. The ANCs were then deduced from the juxtaposition of DWBA and CC calculations with the experimental angular distributions and the zero energy astrophysical S-factor for 3He(α,γ)7Be reaction was calculated to equal 0.534 ± 0.025 keVb. Both our experimental and theoretical approaches were tested through the analysis of the 6Li(p,γ)7Be astrophysical factor, with further interesting astrophysical implications.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Journal of Physics: Conference Series

ISBN

—

ISSN

1742-6588

e-ISSN

1742-6596

Number of pages

6

Pages from-to

012093

Publisher name

IOP Publishing

Place of publication

Bristol

Event location

Cape Town

Event date

Sep 11, 2022

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

001086407400093