61 citations · 265 across the 8 of their papers we have counts for
8 papers
Hydrogen Ionization Inside the Sun
V. A. Baturin, S. V. Ayukov, A. V. Oreshina +4
Hydrogen is the main chemical component of the solar plasma, and H-ionization determines basic properties of the first adiabatic exponent . Hydrogen ionization remarkably diff…
The Current State of the Controversy over Screening in Nuclear Reactions
Werner Däppen
A controversy about the possibility of dynamic effects in nuclear screening has been around for several decades. On the one hand, there is the claim that there are no dynamic effec…
Dynamic screening in solar plasma
Dan Mao, Katie Mussack, Werner Däppen
In the hot, dense plasma of solar and stellar interiors, Coulomb potentials are screened, resulting in increased nuclear reaction rates. Although Salpeter's approximation for stati…
Effects of Heavy Elements and Excited States in the Equation of State of the Solar Interior
Zhigang Gong, Werner Dappen, Alan Nayfonov
Although 98% of the solar material consists of hydrogen and helium, the remaining chemical elements contribute in a discernible way to the thermodynamic quantities. The contributio…
Generalized Fermi-Dirac Functions and Derivatives: Properties and Evaluation
Zhigang Gong, Ladislav Zejda, Werner Dappen +1
The generalized Fermi-Dirac functions and their derivatives are important in evaluating the thermodynamic quantities of partially degenerate electrons in hot dense stellar plasmas.…
The MHD equation of state with post-Holtsmark microfield distributions
Alan Nayfonov, Werner Dappen, David G. Hummer +1
The Mihalas-Hummer-Dappen (MHD) equation of state is a part of the Opacity Project (OP), where it mainly provides ionization equilibria and level populations of a large number of a…
Grids of stellar models. VIII. From 0.4 to 1.0 Msun at Z=0.020 and Z=0.001, with the MHD equation of state
C. Charbonnel, W. Dappen, D. Schaerer +4
We present stellar evolutionary models covering the mass range from 0.4 to 1 Msun calculated for metallicities Z=0.020 and 0.001 with the MHD equation of state (Hummer & Mihalas, 1…
Helioseismic analysis of the hydrogen partition function in the solar interior
S. Basu, W. Dappen, A. Nayfonov
The difference in the adiabatic gradient gamma_1 between inverted solar data and solar models is analyzed. To obtain deeper insight into the issues of plasma physics, the so-called…