Table 3 Fitting results for the Ta L3 edge data.

From: Evidence from EXAFS for Different Ta/Ti Site Occupancy in High Critical Current Density Nb3Sn Superconductor Wires

Sample ID, fit type

Scattering Path

N (Fixed)

R (fit)

σ2 (Å2)

Site Occupancy

Ta#1, two-site fit

Ta – Nb1

2

2.68

0.0042

0.70

Ta – Sn

4

2.96

0.0097

0.70

Ta – Nb2

8

3.24

0.0087

0.70

Ta – Nb

12

2.96

0.0097

0.30

Ta + Ti, two-site fit

Ta – Nb1

2

2.64

0.0042

0.68

Ta – Sn

4

2.96

0.0095

0.68

Ta – Nb2

8

3.24

0.0084

0.68

Ta – Nb

12

2.96

0.0095

0.32

Ta#2, two-site fit

Ta – Nb1

2

2.67

0.0044

0.79

Ta – Sn

4

2.95

0.0078

0.79

Ta – Nb2

8

3.24

0.0091

0.79

Ta – Nb

12

2.95

0.0078

0.21