Statistics
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aps..aprb11008r&link_type=abstract
American Physical Society, APS April Meeting, April 14-17, 2007, abstract #B11.008
Statistics
Scientific paper
Observations of Ultra-Heavy galactic cosmic rays (GCR) help to distinguish the possible origins of GCRs. The Trans-Iron Galactic Element Recorder (TIGER) is designed to measure the charge (Z) and energy of GCRs using a combination of scintillation counters, Cherenkov counters, and a scintillating fiber hodoscope. TIGER has accumulated data on two successful flights from McMurdo, Antarctica in December of 2001 and in December of 2003 with a total flight duration of ˜50 days. The combined TIGER dataset achieved sufficient statistics and charge resolution to resolve ˜140 particle with Z>30, and provides the measurements to date for 30Zn, 31Ga, 32Ge, and 34Se. We present the preliminary abundances of the Ultra-Heavy GCRs derived from the combined dataset propagated to the top of the atmosphere, and discuss the results in the context of previous measurements and different GCR source models.
Barbier Loius M.
Binns Robert W.
Cummings Jay R.
de Nolfo Georgia Adair
Geier Stephan
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