Indications of proton-dominated cosmic-ray composition above 1.6 EeV.
Abbasi RU, Abu-Zayyad T, Al-Seady M, Allen M, Amman JF, Anderson RJ, Archbold G, Belov K, Belz JW, Bergman DR, Blake SA, Brusova OA, Burt GW, Cannon C, Cao Z, Deng W, Fedorova Y, Finley CB, Gray RC, Hanlon WF, Hoffman CM, Holzscheiter MH, Ivanov D, Hughes G, Hüntemeyer P, Ivanov D, Jones BF, Jui CC, Kim K, Kirn MA, Loh EC, Liu J, Lundquist JP, Maestas MM, Manago N, Marek LJ, Martens K, Matthews JA, Matthews JN, Moore SA, O'Neill A, Painter CA, Perera L, Reil K, Riehle R, Roberts M, Rodriguez D, Sasaki N, Schnetzer SR, Scott LM, Sinnis G, Smith JD, Sokolsky P, Song C, Springer RW, Stokes BT, Stratton S, Thomas SB, Thomas JR, Thomson GB, Tupa D, Zech A, Zhang X; High Resolution Fly's Eye Collaboration.
Abbasi RU, et al. Among authors: amman jf.
Phys Rev Lett. 2010 Apr 23;104(16):161101. doi: 10.1103/PhysRevLett.104.161101. Epub 2010 Apr 20.
Phys Rev Lett. 2010.
PMID: 20482038