Measurement of the Relative Abundances of the Ultra-Heavy Galactic Cosmic-Ray Abundances (30 ≤ Z ≤ 40) with TIGER

Details Measurement of the Relative Abundances of the Ultra-Heavy Galactic Cosmic-Ray Abundances (30 ≤ Z ≤ 40) with TIGER Measurement of the Relative Abundances of the Ultra-Heavy Galactic Cosmic-Ray Abundances (30 ≤ Z ≤ 40) with TIGER

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007auhe.conf..139r&link_type=abstract

ASTROPHYSICS AT ULTRA-HIGH ENERGIES. Proceedings of the 15th Course of the International School of Cosmic Ray Astrophysics . Hel

Astronomy and Astrophysics

Astrophysics

Galactic Cosmic Rays, Galactic Abundances

Scientific paper

Observations of Ultra-Heavy galactic cosmic rays (GCR) help to distinguish the possible origins of GCRs. The Trans-Iron Galactic 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: the first launched in December of 2001 with a total flight duration of 31.8 days and the second in December of 2003 with a total flight duration of 18 days. The two flights of TIGER achieved sufficient statistics and charge resolution to resolve ~140 particles with Z > 30, and have provided the best measurements to date for Zn, Ga, Ge, and Se. We present a preliminary analysis of the combined data from both flights for Ultra-Heavy GCRs and discuss the results in the context of different GCR source models.

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