On the photoelectric yield of insulating dust grains

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Cosmic Dust, Granular Materials, Hydrogen Clouds, Interstellar Matter, Photoelectric Effect, Photoelectrons, Astronomical Models, Dielectrics, Hydrogen Ions, Mean Free Path, Random Walk, Space Charge, Stellar Mass Ejection

Scientific paper

Adopting a very schematic model for the excitation and migration of the
electrons the photoelectric yield for small cold spherical dielectric
grains is derived. The results indicate a yield close to unity, a value
which is an order of magnitude larger than laboratory measurements
performed on large specimens indicate.

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