Supergiant halos as an integral record of natural pionic radioactivity
  In this paper an unified interpretation of the supergiant halos (SGH), discovered by Grady, Walker and Laemmlein, is discussed. So, it is proved that SGH`s can be considered as integral records of the nuclear pionic radioactivity. 
D. B. Ion (1), Reveica Ion-Mihai (2), M. L. Ion (2), Adriana I. Sandru   (1) ((1) IFIN-HH, Bucharest, Romania, (2) Universit...