Table 2.

Alpha- and Beta particle emitting radionuclides used for treatment.

		Radionuclide	Emission	Half-Life	Production	Energy(keV)	Travel Distance
Therapeutic Radionuclides	Alpha-emitters	225Ac	α, β−, ϒ	9.92 days	Generator	7.069	50–100 μm
		211At	α	7.20 h	Cyclotron	5.867	50–100 μm
		213Bi	α, ϒ	46 min	Generator	6.051	50–100 μm
		212Pb	α, β−, ϒ	10.64 h	Generator	8.785	50–100 μm
	Beta-emitters	131I	β−, ϒ	8.02 days	Reactor	606	200 µm–1 mm
		177Lu	β−, ϒ	6.68 days	Reactor	498	230 µm
		188Re	β−, ϒ	16.98 h	Generator	2.110	11 mm
		90Y	β−	2.67 days	Generator	2.280	12 mm