Hot atom chemistry in comets

Details Hot atom chemistry in comets Hot atom chemistry in comets

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.249..161r&link_type=abstract

In ESA Proceedings of an ESA Workshop on the Comet Nucleus Sample Return Mission p 161-164 (SEE N87-25109 18-90)

Computer Science

1

Comets, Hot Atoms, Interstellar Chemistry, Comet Heads, Comet Nuclei, Comet Tails, Cosmic Rays, Photodissociation, Solar Wind

Scientific paper

Potential sites and kinds of hot reactions in a comet such as P/Halley are discussed. Hot species are provided by solar wind, cosmic rays, and photon induced dissociation processes. More important than the primary hot particles are the secondaries created by energy transfer to substrate atoms. Systems studied in simulation experiments via nuclear recoil and ion implantation techniques comprise carbon and nitrogen projectiles and gaseous or frozen H2O, NH3 and CH4. With a short period comet, hot atom reactions take place particularly in comae and tails. In the nucleus, they are less important when the comet is near the Sun, since only cosmic rays or hard photons can penetrate. Solid state hot atom chemistry, however, seems to be important for nuclei in positions far from the Sun and for their history prior to compaction in the early solar system or in the interstellar dust phase.

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