摘要
The ionization level and free electron density of most abundant elements （C, N, O, Mg, Al, Si, S, and Fe） in the sun are calculated from the centre of the sun to the surface of the photosphere. The model and computations are made under the assumption of local thermodynamic equilibrium （LTE）. The Saha equation has been used to calculate the ionization level of elements and the electron density. Temperature values for calculations along the solar radius are taken from references.
The ionization level and free electron density of most abundant elements （C, N, O, Mg, Al, Si, S, and Fe） in the sun are calculated from the centre of the sun to the surface of the photosphere. The model and computations are made under the assumption of local thermodynamic equilibrium （LTE）. The Saha equation has been used to calculate the ionization level of elements and the electron density. Temperature values for calculations along the solar radius are taken from references.
基金
Project supported by the National Natural Science Foundation of China （Grant Nos 10390161 and G0321003）.
