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. 2021 Oct 12;8:712374. doi: 10.3389/fmed.2021.712374

Table 5.

Erbium and zinc remaining traces in the mass separated samples.

Implanted Tm (measured) Extracted Tm (calculated) Target
Foil Zn Er 167Tm 167Tm 167Tm/Er Er Er 167Tm 167Tm 167Tm/Er 167Tm/Er
(μg) (μg) (MBq) (ng) (MBq/μg) (nAh) (μg) (MBq) (ng) (MBq/μg) (MBq/μg)
1A 0.4 1.9 8.7 2.8 4.6 938 5.8 33.6 10.7 4.6 3.1 × 10−3
2B 0.2 0.8 7.7 2.5 9.6 919 5.7 20.2 6.5 3.4 2.8 × 10−3
3A 0.5 1.4 15.4 4.9 11.0 496 3.1 28.8 9.2 9.4 4.7 × 10−3

167Tm/Er ratios are calculated for the time directly after mass separation and compared to expected results on extracted activity if sputtering is avoided, and to the ratio in the Er2O3 targets before mass separation.