Lawrence Livermore National Laboratory

Reto Trappitsch

Postdoctoral Scholar
Nuclear and Chemical Sciences Division

 +1 925-422-1680

Ph.D. Geophysical Sciences
University of Chicago, USA
M.Sc. Experimental Physics
University of Bern, Switzerland
B.S. Physics and Astronomy
University of Auckland, NZ

Research Interests

My main research focuses on cosmochemistry, especially presolar grain research and modeling of cosmogenic nuclides. By measuring the isotopic composition of presolar grains stellar nucleosynthesis as well as galactic chemical evolution can be studied and constrained. To measure the trace element isotopic composition in these micrometer-sized samples, I use and further develop resonance ionization mass spectrometry, a state-of-the-art mass spectrometry technique.

Honors and Awards

  • Nathan Sugarman Award for Excellence in Graduate Research
  • NASA Earth and Space Science Fellowship
  • NASA Cosmochemistry Travel Grants
  • Best Poster Award at Laser at the 7th International Conference on Laser Probing, East Lansing, MI
  • Chicago Center for Cosmochemistry Fellowship
  • Wiley Blackwell Award, Annual Meeting of the Meteoritical Society 2012, Cairns, Australia
  • Best Poster Award at the XII International Symposium on Nuclei in the Cosmos, Cairns, Australia
  • Local Organizing Committee Travel Grant, XII International Symposium on Nuclei in the Cosmos, Cairns, Australia

Selected (Recent) Publications

  1. Trappitsch R. and Leya I. (2016) Production and recoil loss of cosmogenic nuclides in presolar grains. The Astrophysical Journal 823:12 (11pp).
  2. Stephan T., Trappitsch R., Davis A. M., Pellin M. J., Rost D., Savina M. R., Yokochi R., and Liu N. (2016) CHILI – the Chicago Instrument for Laser Ionization – a new tool for isotope measurements in cosmochemistry. International Journal of Mass Spectrometry 407:1-15.
  3. Trappitsch R. and Ciesla F. J. (2015) Solar cosmic-ray interaction with protoplanetary disks: production of short-lived radionuclides and amorphization of crystalline material. The Astrophysical Journal 805:5 (11pp).
  4. Pignatari M., Zinner E., Hoppe P., Jordan C. J., Gibson B. K., Trappitsch R., Herwig F., Fryer C., Hirschi R., and Timmes F. X. (2015) Carbon-rich presolar grains from massive stars: subsolar 12C/13C and 14N/15N ratios and the mystery of 15N. The Astrophysical Journal Letters 808:L43 (6pp).
  5. Trappitsch R. and Leya I. (2013) Cosmogenic production rates and recoil loss effects in micrometeorites and interplanetary dust particles. Meteoritics & Planetary Science 48:195-210.

Last update: March 8, 2017