Table 2 Atomic and nuclear data of stable erbium isotopes.

From: Laser isotope enrichment of 168Er

Isotope

Abundance (%)

Nuclear Spin (I)

Thermal neutron absorption cross-section (barns)

162Er

0.139

0

19 ± 2

164Er

1.601

0

13 ± 2

166Er

33.503

0

16.9 ± 1.6

167Er

22.869

7/2

649 ± 8

168Er

26.978

0

2.74 ± 0.08

170Er

14.910

0

8.85 ± 0.30

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