Self-consistent Strong Screening Applied to Thermonuclear Reactions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2FCZ______%3A_____%2F24%3AN0000072" target="_blank" >RIV/CZ______:_____/24:N0000072 - isvavai.cz</a>

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.3847/1538-4357/ad7dee" target="_blank" >https://iopscience.iop.org/article/10.3847/1538-4357/ad7dee</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/ad7dee" target="_blank" >10.3847/1538-4357/ad7dee</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Self-consistent Strong Screening Applied to Thermonuclear Reactions

Popis výsledku v původním jazyce

Self-consistent strong plasma screening around light nuclei is implemented in the Big Bang nucleosynthesis (BBN) epoch to determine the short-range screening potential, e phi(r)/T >= 1, relevant for thermonuclear reactions. We numerically solve the nonlinear Poisson-Boltzmann equation incorporating Fermi-Dirac statistics, adopting a generalized screening mass to find the electric potential in the cosmic BBN electron-positron plasma for finite-sized alpha particles (He-4(++)) as an example. Although the plasma follows Boltzmann statistics at large distances, Fermi-Dirac statistics is necessary when work performed by ions on electrons is comparable to their rest-mass energy. While self-consistent strong screening effects are generally minor owing to the high BBN temperatures, they can enhance the fusion rates of high-Z (Z > 2) elements while leaving fusion rates of lower-Z (Z <= 2) elements relatively unaffected. Our results also reveal a pronounced spatial dependence of the self-consistent strong screening potential near the nuclear surface. These findings about the electron-positron plasma's role refine BBN theory predictions and offer broader applications for studying weakly coupled plasmas in diverse cosmic and laboratory settings.

Název v anglickém jazyce

Self-consistent Strong Screening Applied to Thermonuclear Reactions

Popis výsledku anglicky

Self-consistent strong plasma screening around light nuclei is implemented in the Big Bang nucleosynthesis (BBN) epoch to determine the short-range screening potential, e phi(r)/T >= 1, relevant for thermonuclear reactions. We numerically solve the nonlinear Poisson-Boltzmann equation incorporating Fermi-Dirac statistics, adopting a generalized screening mass to find the electric potential in the cosmic BBN electron-positron plasma for finite-sized alpha particles (He-4(++)) as an example. Although the plasma follows Boltzmann statistics at large distances, Fermi-Dirac statistics is necessary when work performed by ions on electrons is comparable to their rest-mass energy. While self-consistent strong screening effects are generally minor owing to the high BBN temperatures, they can enhance the fusion rates of high-Z (Z > 2) elements while leaving fusion rates of lower-Z (Z <= 2) elements relatively unaffected. Our results also reveal a pronounced spatial dependence of the self-consistent strong screening potential near the nuclear surface. These findings about the electron-positron plasma's role refine BBN theory predictions and offer broader applications for studying weakly coupled plasmas in diverse cosmic and laboratory settings.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

The Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Svazek periodika

976

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

01.IX

Kód UT WoS článku

001354519100001

EID výsledku v databázi Scopus

2-s2.0-85207195161