Photoemission on the surface of Mercury and related electrical phenomena

Details Photoemission on the surface of Mercury and related electrical phenomena Photoemission on the surface of Mercury and related electrical phenomena

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997p%26ss...45...67g&link_type=abstract

Planetary and Space Science, v. 45, p. 67-72.

Physics

13

Scientific paper

Solar photons interact with the surface of Mercury due to the absence of an atmosphere. Photo-electrons are emitted from the sunlit hemisphere with a mean kinetic energy of about 1.6eV. The current density lies in the range 0.1-0.2 mA m-2 at the subsolar point and is maximum at perihelion. Photoemission provides the means of a direct electrical coupling between the planet and its magnetospheric environment and sets a lower limit of the order of 10-5 S to the conductance of the surface of a perfectly insulating regolith.

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