Collective Plasma Processes in the Solar Interior and the Problem of the Solar Neutrino Deficit

Details Collective Plasma Processes in the Solar Interior and the Problem of the Solar Neutrino Deficit Collective Plasma Processes in the Solar Interior and the Problem of the Solar Neutrino Deficit

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996stin...9629918t&link_type=abstract

Technical Report, Central Lab. of the Research Councils Chilton, United Kingdom

Physics

Plasma Physics

Dense Plasmas, Energy Transfer, Radiative Transfer, Plasma Radiation, Plasma Physics, Solar Physics, Solar Neutrinos, Sun, Particle Production, Particle Collisions, Doppler Effect, Photons, Raman Spectra, Plasma Resonance, Solar Oscillations

Scientific paper

This review presents the results of recent calculations of collective plasma processes of radiation transport in the solar interior. The review introduces a remarkable number of effects previously neglected which are shown to reduce substantially the Rosseland opacity at the center of the Sun (the decrease of opacity is approximately 10% which is greater than previously accepted possible errors in opacity). It is also shown that effects, which were previously treated without taking into account the collective behavior of plasmas, change appreciably when the collective nature of the plasma is included. The analysis is based on the modern concepts plasma physics in which an essential role is played by photon scattering on ions and the emission by the oscillation cloud of electrons surrounding the ions. The process which contributes most to a decrease in opacity are: the broadening of the Raman resonance (due to both the Doppler effect and binary electron-ion collisions), frequency diffusion of radiation during radiative energy transfer, the processes of stimulated scattering and collective quantum corrections to the scattering. A list of collective plasma effects which influence photon transport in the dense central solar plasma is presented. The results of these new calculations and the developed theory shows that a better agreement between the observed neutrino flux and the theoretical predictions is beginning to appear. New problems are discussed which can be of importance from the point of view of modern plasma physics for solar neutrino production in different energy ranges.

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