Physics
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..apr.j7008j&link_type=abstract
American Physical Society, April Meeting, 2004, May 1-4, 2004, Denver, Colorado April 2004, MEETING ID: APR04, abstract #J7.008
Physics
Scientific paper
Measuring the chemical composition of the cosmic rays in the energy region of ≥ 10^12eV would be highly useful in settling several nagging questions concerning the propagation of cosmic rays in the galaxy. In particular an accurate measurement of secondary to primary ratios such as Boron to Carbon would give clear evidence as to whether the propagation of cosmic rays is detemined by a diffusion coefficient that varies with the particle's energy as E^0.5 or E^0.3. This would go a long way in helping us to understand the anisotropy (or lack thereof) of the highest energy cosmic rays and the power requirements for producing those particles at ≈ 10 ^18 eV which are believed to be highest energy particles produced in the Galaxy. This would be only one of the benefits of aa mission such as ACCESS to perform direct particle measurements on very high energy cosmic rays.
Jones Frank
Streitmatter Robert
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