Robert Pepin
Professor, Director IT Honors
421 Shep/ 136 Lind, 624-0819/625-2800, email pepin001 @ umn.edu
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Current Research
Origin and early history of volatile elements and compounds in the solar system as revealed by mass spectrometer measurements of noble gases and nitrogen in meteorites and lunar samples. Areas of particular interest include the composition of the primordial solar nebula, isotopic signatures of nucleosynthesis in primitive meteorites, the compositional history of solar wind and flares over the past 4+ billion years, and the origin and evolution of volatiles in the interiors and atmospheres of Earth, Mars and Venus.
Selected Publications
R. Pepin, On noble gas processing in the solar accretion disk, Space Science Reviews 106, 211-230 (2003).
R. Pepin, Irradiation records in regolith materials, II: Solar wind and solar energetic particle components in helium, neon, and argon extracted from single lunar mineral grains and from the Kapoeta howardite b, Geochimica et Cosmochimica Acta 66, 2929-2958 (2002).
R. Pepin, Origin of noble gases in the terrestrial planets, Reviews in Mineralogy and Geochemistry 47, 191-246 (2002).
R. Pepin, Noble gases in interplanetary dust particles, II: Excess helium-3 in cluster particles and modeling constraints on interplanetary dust particle exposures to cosmic ray irradiation, Meteoritics and Planetary Science 36, 1515-1534 (2001).
Education
A.B. Physics, Harvard College, 1956.