Figure 1

Gamma spectrum of the mother and purified solutions. (A) Gamma-ray spectrum of the mother solution containing a hundredth (10 µL) of the total volume (1 mL), which was measured for 20 min at 21.5 cm from the detector, 47 min after the end of irradiation. (B) Gamma-ray spectrum of the purified solution containing a thousandth (10 μL) of the total volume (10 mL), which was measured for 20 min at 3.5 cm from the detector, 124 min after the end of irradiation.