title: RBE of 650-MeV helium ions at different depths for chromosome aberrations in Allium cepa.
mesh_terms: D002869:Chromosome Aberrations; D006371:Helium; D007477:Ions; D008433:Mathematics; D010944:Plants / Q000528:radiation effects*; D012062:Relative Biological Effectiveness
chemical_list: D007477:Ions; D006371:Helium