1926 R. W. Lawson tr. G. von Hevesy & F. A. Paneth iv. 49 A γ-‘particle’ produces 1·5 pairs of ions per unit of length.
1974 11 May 45/1 Audio Magnetics has greatly improved upon their cobalt-doped coatings, conducting research on gamma particles.
2003 M. E. Byrnes et al. (2005) ii. 38 Alpha-emitting radionuclides may also emit gamma particles.