Berlin 2001 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

MS: Massenspektrometrie

MS 1: Accelerator Mass Spectrometry 1

MS 1.1: Vortrag

Montag, 2. April 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.