Sigl, G; Lee, S; Schramm, D. N; Bhattacharjee, P
(American Association for the Advancement of Science, 1995-12)
Recent experimental data seem to indicate that there is significant structure in the cosmic ray spectrum above 1018 electron volts (eV). Besides a dip at ~5 x 1018 eV, two events above 2 x 1020 eV have been observed. The ...