Asymptotic properties of energy spectra for high-energy cascade electron and photon in strong magnetic fields

T. Nakatsuka1 ∗, A. Iyono2, H. Matsumoto2, K. Okei3, S. Tsuji3, and J. Nishimura4 1Laboratory of Information Science, Okayama Shoka University, Okayama 700-8601, Japan 2Department of Fundamental Science, Okayama University of Science, Okayama 700-0005, Japan 3Department of Natural Sciences, Kawasaki Medical School, Kurashiki 701-0192, Japan 4The Institute of Space and Astronomical Science, JAXA, Sagamihara 252-5210, Japan