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SUMMARY:Identifying Old Ice and Water with Radiokrypton
DTSTART:20260305T151500Z
DTEND:20260305T161500Z
DTSTAMP:20260415T185700Z
UID:indico-event-24559@indico.gsi.de
CONTACT:l.wunderlich@gsi.de\;+49-6159-71-1879
DESCRIPTION:Speakers: Zheng-Tian Lu (Hefei National Laboratory (UST China)
 )\n\nSPECIAL GSI-FAIR COLLOQUIUM\n \nThe long-lived noble-gas isotope 81K
 r is the ideal tracer for old water and ice with ages of 0.1 – 1 million
  years\, a range beyond the reach of 14C.  81Kr-dating\, a concept pursue
 d over the past six decades\, is now available to the earth science commun
 ity at large.  This is made possible by the development of the Atom Trap 
 Trace Analysis (ATTA) method\, in which individual atoms of the desired is
 otope are captured and detected.  ATTA possesses superior selectivity\, a
 nd is thus far used to analyze the environmental radioactive isotopes 85Kr
 \, 39Ar\, 41Ca\, and 81Kr.  These isotopes have extremely low isotopic ab
 undances in the range of 10-17 to 10-11\, and cover a wide range of ages a
 nd applications.  In collaboration with earth scientists\, we are dating 
 groundwater and mapping its flow in major aquifers around the world\, and 
 dating old ice from the deep ice cores of Antarctica\, Greenland\, and the
  Tibetan Plateau. For an update on this worldwide effort\, please google 
 “ATTA Primer”.\n \n\nhttps://indico.gsi.de/event/24559/
LOCATION:Main Lecture Hall (GSI)
URL:https://indico.gsi.de/event/24559/
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