Göran Possnert

Göran Possnert
Professor
Department of Engineering Sciences
Uppsala University
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Accelerator Mass Spectrometry

Accelerator Mass Spectrometry (AMS) utilizes medium energy accelerators and state-of-the-art nuclear physics technology. The method offers exceptional sensitivity for isotopic ratio measurements which is of interest to a number of scientific disciplines. The first AMS measurements were performed in Uppsala almost 30 years ago and since then the number of application have grown enormously. Examples of AMS research in Uppsala are:

129I for environmental studies:             Temporal and spatial distribution of anthropogenic isotopes in Northern Europe
10Be for geological research:                Solar activities measurement
14C for archaeological dating:               Dating of artifacts up to 50,000 years old
14C for biological research:                   DNA-dating and Microdosing.

The latter concerns the Human Regeneration Map project and requires adaptation of the technique for sample amounts normally not applicable to AMS and especially susceptible to contamination.

 

 

5 Selected publications:


Matthias Krings1, 8, Cristian Capelli2, 8, Frank Tschentscher3, 8, Helga Geisert4, Sonja Meyer1, Arndt von Haeseler1, Karl Grossschmidt5, Göran Possnert6, Maja Paunovic7 & Svante Pääbo1. A view of Neanderthal genetic diversity. Nature Genetics, Vol. 26 Issue: 2 Pages: 144-146 Published: Oct. 2000


Bjorck S, Kromer B, Johnsen S, Bennike O, Hammarlund D, Lemdahl G, Possnert G, Rasmussen TL, Wohlfarth B, Hammer CU, Spurk M. Synchronized terrestrial-atmospheric deglacial records around the North Atlantic. Science Vol. 274 Issue: 5290 Pages: 1155-1160 Published: Nov. 15, 1996


Poinar HN, Hofreiter M, Spaulding WG, Martin PS, Stankiewicz BA, Bland H, Evershed RP, Possnert G, Pääbo S. Molecular coproscopy: Dung and diet of the extinct ground sloth Nothrotheriops shastensis. Science Vol. 281 Issue: 5375 Pages: 402-406 Published: Jul 17 1998


Serre D, Langaney A, Chech M, Teschler-Nicola M, Paunovic M, Mennecier P, Hofreiter M, Possnert G, Pääbo S. No evidence of neandertal mtDNA contribution to early modern humans. PLoS Biol. 2:E57, 2004.


Aldahan A, Hedfors J, Possnert G, Kulan A, Berggren A.-M., Söderström, C. Atmospheric impact on beryllium isotopes as solar activity proxy. Geophysical Research Letters Vol. 35 Issue: 21 Article Number: L21812, Published: NOV 14 2008