Astrophysical S-factor for the He-3(alpha,gamma)Be-7 reaction via the asymptotic normalization coefficient (ANC) method
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00533993" target="_blank" >RIV/61389005:_____/20:00533993 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.physletb.2020.135606" target="_blank" >https://doi.org/10.1016/j.physletb.2020.135606</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.physletb.2020.135606" target="_blank" >10.1016/j.physletb.2020.135606</a>
Alternative languages
Result language
angličtina
Original language name
Astrophysical S-factor for the He-3(alpha,gamma)Be-7 reaction via the asymptotic normalization coefficient (ANC) method
Original language description
The detection of the neutrinos produced in the p - p chain and in the CNO cycle can be used to test the Standard Solar Model. The He-3(alpha,gamma)Be-7 reaction is the first reaction of the 2nd and 3rd branch of the p - p chain, therefore, the uncertainty of its cross section sensitively influences the prediction of the Be-7 and B-8 neutrino fluxes. Despite its importance and the large number of experimental and theoretical works devoted to this reaction, the knowledge on the reaction cross section at energies characterizing the core of the Sun (15 keV - 30 keV) is limited and further experimental efforts are needed to reach the desired (approximate to 3%) accuracy. The precise knowledge on the external capture contribution to the He-3(alpha,gamma)Be-7 reaction cross section is crucial for the theoretical description of the reaction mechanism. In the present work the indirect measurement of this external capture contribution using the Asymptotic Normalization Coefficient (ANC) technique is reported. To extract the ANC, the angular distributions of deuterons emitted in the Li-6(He-3,d)Be-7 alpha-transfer reaction were measured with high precision at E-3He = 3.0 MeV and E-3He = 5.0 MeV. The ANCs were then extracted from comparison of DWBA calculations to the measured data and the zero energy astrophysical S-factor for He-3(alpha,gamma)Be-7 reaction was found to be 0.534 +/- 0.025 keVb.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/EF16_013%2F0001679" target="_blank" >EF16_013/0001679: SPIRAL2 - Systeme de Production d´Ions Radioactifs Accélérés en Ligne - participation of the Czech Republic-OP</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physics Letters. B
ISSN
0370-2693
e-ISSN
—
Volume of the periodical
807
Issue of the periodical within the volume
AUG
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
6
Pages from-to
135606
UT code for WoS article
000571765700073
EID of the result in the Scopus database
2-s2.0-85087988861