New Determination of the H-2(d,p)H-3 and H-2(d,n)He-3 Reaction Rates at Astrophysical Energies

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F14%3A00429047" target="_blank" >RIV/61389005:_____/14:00429047 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/0004-637X/785/2/96" target="_blank" >http://dx.doi.org/10.1088/0004-637X/785/2/96</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/0004-637X/785/2/96" target="_blank" >10.1088/0004-637X/785/2/96</a>

Result language
angličtina
Original language name
New Determination of the H-2(d,p)H-3 and H-2(d,n)He-3 Reaction Rates at Astrophysical Energies
Original language description
The cross sections of the H-2(d,p)H-3 and H-2(d,n)He-3 reactions have been measured via the Trojan Horse method applied to the quasi-free H-2(He-3, p(3)H)H-1 and H-2(He-3,n(3)He)H-1 processes at 18 MeV off the proton in He-3. For the first time, the barenucleus S(E) factors have been determined from 1.5 MeV, across the relevant region for standard Big Bang nucleosynthesis, down to the thermal energies of deuterium burning in the pre-main-sequence (PMS) phase of stellar evolution, as well as of future fusion reactors. Both the energy dependence and the absolute value of the S(E) factors deviate by more than 15% from the available direct data and existing fitting curves, with substantial variations in the electron screening by more than 50%. As a consequence, the reaction rates for astrophysics experience relevant changes, with a maximum increase of up to 20% at the temperatures of the PMS phase. From a recent primordial abundance sensitivity study, it turns out that the H-2(d,n)He-3 re
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BG - Nuclear, atomic and molecular physics, accelerators
OECD FORD branch
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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
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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