Table 1. Electrodeposition of ²²⁵Ac^a.

		activity in electrolyte		activity on electrode
events	time (min)	mCi	%	mCi	%
start of electroplating	0	1.34	100
end of electroplating	98	0.228	17.0	1.07	80.2
measurement of activities on the electrode as a function of time after the end of electroplating	2			0.677	63.0
	7			0.775	72.2
	18			0.836	77.8
	41			0.982	91.4
	56			1.05	97.8
	62			1.07	100

^aThe electrolyte (10 mL of 0.01 M HNO₃) was magnetically stirred during the electrodeposition. Both working and counter electrodes were Pt (see the Preparation of 225Ac Source section for details). Electrodeposition was conducted under a constant dc potential of 10–11 V. In this experiment, gross radioactivity was measured in an ionization chamber (see the Chemicals, Radioisotopes, and Radioactivity Measurement section).