IBEX-Lo observations of energetic neutral hydrogen atoms originating from the lunar surface

Details IBEX-Lo observations of energetic neutral hydrogen atoms originating from the lunar surface IBEX-Lo observations of energetic neutral hydrogen atoms originating from the lunar surface

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012p%26ss...60..297r&link_type=abstract

Planetary and Space Science, Volume 60, Issue 1, p. 297-303.

Physics

Scientific paper

In this paper we present quantitative results of observations of energetic neutral atoms (ENAs) originating from the lunar surface. These ENAs, which are hydrogen atoms, are the result of the solar wind protons being reflected from and neutralised at the surface of the Moon. These measurements were made with IBEX-Lo on NASA's IBEX satellite. From these measurements we derive the energy spectrum of the ENAs, their flux, and the lunar albedo for ENAs (i.e., the ratio of ENAs to the incoming solar wind protons). The energy spectra of the ENAs clearly show that their origin is directly from the solar wind via backscattering, and that they are not sputtered atoms. From several observation periods we derived an average global albedo of AH=0.09±0.05. From the observed energy spectra we derive a generic spectrum for unshielded bodies in the solar wind.

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