Abstract
Electron screening in an important effect that cannot be neglected in nuclear astrophysics, since it influences nuclear reaction cross sections at low energies. We are trying to understand why most measurements in inverse kinematics on solid targets give electron screening potentials more than an order of magnitude above predictions. Below we report our latest results on electron screening in nuclear reactions 1H(14N,γ)15O and 2H(19F,ρ)2°F in both inverse and normal kinematics. The analysis is in progress.
Highlights
Electron screening is an effect that enhances nuclear reaction probabilities at low energies, when both reactants are positively charged nuclei
Electron screening in nuclear reactions is an important effect that needs to be taken into account in nuclear astrophysics
Due to the discrepancy between experiments and theory, it is not yet clear how electron screening should be treated in stellar plasmas
Summary
Electron screening is an effect that enhances nuclear reaction probabilities at low energies, when both reactants are positively charged nuclei. It was predicted in the very early days of the field of nuclear astrophysics [1]. This result is called the adiabatic limit and represents the maximum value for Ue. While the theory predicts an electron screening potential independent of the target host material, measurements report a strong dependence of cross section enhancement on the target host, which further substantiates the above-mentioned disbelief in measurements. The nuclear reactions that we are using for the studies of electron screening are 1H(141Ȗ 15O and 2H(19F,p)20F
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