TABLE 1

Summary of Decay Characteristics of ¹⁷⁷Lu and ^177mLu and Emitted Energy Per Decay

¹⁷⁷Lu β⁻ decay (100%)		Total emitted energy per decay, 181 keV
Gammas	Energy (keV)^*		113		208	250	321
	Yield per 100 ¹⁷⁷Lu decays		6.2		10.4	0.20	0.21
Electrons	Emitted energy (keV/decay)^†	5.5	11.7	10.1	118.6
	Particle type	β⁻	CE	β^-	β^-
^177mLu β⁻ decay (78.6%)		Total emitted energy per decay, 1,048 keV
Gammas	Energy (keV)^*		105	113	129	153	174	204	208	229	282	328	379	419
	Yield per 100 ^177mLu decays		12.4	21.9	15.6	17.0	12.7	13.9	57.4	37.1	14.2	18.1	29.8	21.3
Electrons	Emitted energy (keV/decay)^†	32.1	22.6	41.5	22.5	19.6	12.1	10.6	5.6
	Particle type	β^-	CE	CE	CE	CE	CE	CE	CE
^177mLu IT (21.4%)		Total emitted energy per decay, 212 keV
Gammas	Energy (keV)^*			319	414
	Yield per 100 ^177mLu decays			10.5	17.5
Electrons	Emitted energy (keV/decay)^†	20.6	8.5
	Particle type	CE	CE

↵* γ photons with energy above 100 keV and for ^177mLu a yield more than 10%.
↵† Average energy × yield for β⁻ particles and sum of energy × yield for conversion electrons (CE). Included are transitions that contribute with more than 5 keV per decay.
IT = isomeric transition.
Data were compiled from Kondev (3) and National Nuclear Database Center (4).