Table 1: Polycrystalline leada, Ref. [3].

Isotope/Element v(Hz) vc(Hz) q S(µm)
Sample A
44Ca 975 977 1 1.08
Ag 1600 1592 2 1.08
Pb 1850 1865 3 1.08
OR Bi 1849 3 1.08
65Cu 2650 2645 2 1.08
60Ni 2875 2866 2 1.08
Sample A Annealed
Cu 2900 2904 2 1.04
Pb 3550 3363 4 1.04
OR Bi 3532 4 1.04
Sample Bb
Cu 2825 2852 2 1.05
Pb 3500 3498 4 1.05
OR Bi 3469 4 1.04
Sample B Annealed
Pb 3550 3563 4 1.04
OR Bi 3532 4 1.04
Sample Cc
65Cu 2815 2887 2 1.04
Pb 3650 3619 4 1.03
OR Bi 3588 4 1.02

a Chemical analysis: Bi<0.0001%, Cu 0.0001%, Fe 0.0002%
b Different dimensions
c Obtained from different location on bar, dimensions same as Sample A.