Dynamical screening of α-α Resonant scattering and thermal nuclear scattering rate in a plasma
We use effective field theory and thermal field theory to study the dynamical screening effect in the QED plasma on the α-α scattering at the Be8 resonance. Dynamical screening leads to an imaginary part of the potential which results in a thermal width for the resonance and dominates over the previously considered static screening effect. As a result, both the resonance energy and width increase with the plasma temperature. Furthermore, dynamical screening can have a huge impact on the α-α thermal nuclear scattering rate. For example, when the temperature is around 10 keV, the rate is suppressed by a factor of about 900. We expect similar thermal suppressions of nuclear reaction rates to occur in those reactions dominated by an above threshold resonance with a thermal energy. Dynamical screening effects on nuclear reactions can be relevant to cosmology and astrophysics.
Yao, X; Mehen, T; Müller, B
Volume / Issue
Electronic International Standard Serial Number (EISSN)
International Standard Serial Number (ISSN)
Digital Object Identifier (DOI)