The determination of the astrophysical S-factor of the direct O-18(p, gamma)F-19 capture by the ANC method

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F19%3A00507411" target="_blank" >RIV/61389005:_____/19:00507411 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1140/epja/i2019-12801-8" target="_blank" >https://doi.org/10.1140/epja/i2019-12801-8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epja/i2019-12801-8" target="_blank" >10.1140/epja/i2019-12801-8</a>

Result language
angličtina
Original language name
The determination of the astrophysical S-factor of the direct O-18(p, gamma)F-19 capture by the ANC method
Original language description
The depletion of O-18 via the (p, gamma) capture competes with the (p, alpha) capture during the CNO cycles in AGB stars. Despite the fact that the (p, alpha) capture is dominant, the (p,gamma) can play an important role in mixing stages of the AGB star evolution. Here, we attempt to determine the astrophysical S-factor of the direct part of the O-18(p, gamma)F-19 capture by the indirect method of asymptotic normalization coefficients (ANC). We measure the differential cross section of the transfer reaction O-18(He-3, d)F-19 at a He-3 energy of 24.6 MeV. The measurement was performed on the cyclotron of the CANAM infrastructure of NPI in Re, Czech Republic, with the gas target consisting of the high-purity O-18 (99.9%). The reaction products were measured by eight Delta E-E telescopes composed of thin and thick silicon surface-barrier detectors. The parameters of the optical model for the input channel were deduced by means of the code ECIS and the analysis of transfer reactions to 12 levels of the F-19 nucleus up to 8.014 MeV was made by the code FRESCO. The deduced ANCs were then used to specify the direct contribution to the O-18(p, gamma)F-19 capture process and were compared with the mutually different results of two works.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10304 - Nuclear physics

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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