Parts | Days | Selection | Search | Downloads | Help
MS: Massenspektrometrie
MS 1: Accelerator Mass Spectrometry 1
MS 1.1: Talk
Monday, April 2, 2001, 16:15–16:30, EB 202
Measurements of 26Al in Antarctic ice — •F. Kubo, T. Huber, V. Lazarev, and E. Nolte — Fakultät für Physik, E15, TU München
Interplanetary dust is produced in the asteroid belt of the solar system. Due to the Poynting-Robertson effect the dust particles spiral towards the sun. When they reach the earth those particles can be detected either directly, e.g. in as small spherules in deep-sea sediments, or by their radionuclides.
One prominent nuclide in AMS is 26Al. This is also produced in the earth’s atmosphere by cosmic ray induced spallation on argon. In precipitation samples of high latitudes, e.g. Antarctic ice, the atmospheric fall-out is low enough so that the dust component can be determined.
We have investigated, samples from Livingston Island (62∘ 21’ S, 60∘ 18’ W), from Law Dome (66∘ 24’ S, 111∘ 46’ E) and from the Amundsen-Scott station on the south pole. First results are presented.