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.
@article{arxiv.nucl-th/0401013,
title = {Supergiant halos as an integral record of natural pionic radioactivity},
author = {D. B. Ion and Reveica Ion-Mihai and M. L. Ion and Adriana I. Sandru},
journal= {arXiv preprint arXiv:nucl-th/0401013},
year = {2007}
}