Research

 

 

1. The "oddgroup" was doing research at the MPI for Chemistry in the field of Cosmochemistry.

 

  2. The primary method of analysis was is mass spectrometry. Using this technique abundances and isotopic
    compositions have been determined, primarily of the noble gases (helium, neon, argon, krypton and xenon).
 

 

3. A main line of research was dealing with presolar grains ("stardust"). Small amounts of these grains occur in the
    matrix of the
most primitive meteorites. They can be extracted by combinations of chemical and physical separation
    methods.

 

  4. Another focus of our research has been the study of noble gases in meteorites from planet Mars.  

 

5. The study of the noble gases provides also information about the cosmic ray exposure age of the meteorites, which
    is the time span between ejection from their parent body (an asteroid in most cases) and their arrival on Earth.

 

     
  After the end of the activities at the MPI for Chemistry, similar research is being continued on a reduced scale, in collaboration with the partners at the University of West Hungary as well as the Universities of Heidelberg and Mainz.  
     

 

Information:

 

 

- Some recent results

 

 

- List of publications

 

 

- popular article in Max-Planck-Research

 

  - popular article in Sterne und Weltraum (in German)  
     

 

Some recent and ongoing projects and collaborations:

 

 

- mass spectrometric investigations of trace elements in presolar nano-diamonds with the aims of a) deciphering the
  origin of these grains; and b) contributing to the understanding of processes of nucleosynthesis in supernovae;
  partly in collaboration with University of Vienna and ETH Zürich (Eurogenesis project)

 

  - r-process nucleosynthesis; model calculations in the HEW scenario for explaining solar system abundances as well as
  isotope abundance anomalies
 

 

- abundance and isotopic composition of noble gases in Martian meteorites

 

  - noble gases in howardites (meteorites probably from asteroid Vesta); an aim - also with connection with NASA's
  mission
DAWN to Vesta) - is the evaluation of other indicators for the presence of truly regolithic material (at the
  surface, exposed to the solar wind); project in collaboration with NASA Johnson Space Center
 
  - investigation of possible pre-irradiation of chondrules (~mm-sized melt globules that gave the chondrite meteorites
  their name) in the early solar system; collaboration with University of Heidelberg
  supported by DFG in the framework of priority program SPP 1385 "The first 10 million years..."
 
  - noble gases in Antarctic micrometeorites;
   supported by DFG in the framework of priority program SPP 1385 "The first 10 million years..."
 

 

- determination of landscape evolution (surface exposure, erosion rate) in Antarctica, by means of the abundance
  of cosmogenic neon;
  collaboration with Bundesanstalt für Geowissenschaften und Rohstoffe (BGR; Hannover) and FZ Dresden-Rossendorf

 

 

 

 

 

Information:

 

 

- Some recent results

 

 

- List of publications