Investigation of the F-19(p,alpha)O-16 reaction in the THM framework

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F13%3A00398992" target="_blank" >RIV/61389005:_____/13:00398992 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1742-6596/420/1/012139" target="_blank" >http://dx.doi.org/10.1088/1742-6596/420/1/012139</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/420/1/012139" target="_blank" >10.1088/1742-6596/420/1/012139</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Investigation of the F-19(p,alpha)O-16 reaction in the THM framework

Popis výsledku v původním jazyce

The F-19(p, alpha)O-16 reaction is an important fluorine destruction channel in the proton-rich outer layers of asymptotic giant branch (AGB) stars and it might also play a role in hydrogen-deficient post-AGB star nucleosynthesis. So far, available direct measurements do not reach the energy region of astrophysical interest (E-cm similar to 300 keV), because of the hindrance effect of the Coulomb barrier. Therefore, below Ecm = 460 keV, where data do not exist, a non-resonant contribution is calculatedfor s-capture and the cross section has been extrapolated assuming this contribution as the dominant one. The Trojan Horse (TH) method was thus used to access this energy region, by extracting the quasi-free contribution of the H-2(F-19,alpha O-16)n andthe F-19(He-2,alpha O-16)d reactions. A novel approach, the so-called Modified R-matrix, has been developed to analyze the data, aiming to account for the half-off-energy-shell nature of the TH cross section and for the experimental energ

Název v anglickém jazyce

Investigation of the F-19(p,alpha)O-16 reaction in the THM framework

Popis výsledku anglicky

The F-19(p, alpha)O-16 reaction is an important fluorine destruction channel in the proton-rich outer layers of asymptotic giant branch (AGB) stars and it might also play a role in hydrogen-deficient post-AGB star nucleosynthesis. So far, available direct measurements do not reach the energy region of astrophysical interest (E-cm similar to 300 keV), because of the hindrance effect of the Coulomb barrier. Therefore, below Ecm = 460 keV, where data do not exist, a non-resonant contribution is calculatedfor s-capture and the cross section has been extrapolated assuming this contribution as the dominant one. The Trojan Horse (TH) method was thus used to access this energy region, by extracting the quasi-free contribution of the H-2(F-19,alpha O-16)n andthe F-19(He-2,alpha O-16)d reactions. A novel approach, the so-called Modified R-matrix, has been developed to analyze the data, aiming to account for the half-off-energy-shell nature of the TH cross section and for the experimental energ

Druh

D - Stať ve sborníku

CEP obor

BG - Jaderná, atomová a molekulová fyzika, urychlovače

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název statě ve sborníku

Journal of physics: Conference series

ISBN

—

ISSN

1742-6588

e-ISSN

—

Počet stran výsledku

5

Strana od-do

—

Název nakladatele

IOP Publishing

Místo vydání

Bristol

Místo konání akce

San Antonio, Texas

Datum konání akce

27. 5. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000318430800139