IAEA 2017 Neutron Data Standards in Table Format
A. D. Carlson et al, Nuclear Data Sheets 148 (2018) 143-188. 
https://doi.org/10.1016/j.nds.2018.02.002

Table. 238U(n,g) cross section. 
En is the incident neutron energy. CS is the cross section. DCS is the cross section uncertainty. 
Data followed by “*”are smoothed values.
These data include a 1.7 % unrecognized systematic uncertainty below 1 MeV and 2.4 % at 1 MeV and above.
Linear interpolation is recommended except below 30 keV where log-log interpolation should be used. 

En       CS      DCS
MeV      barn    %
2.53E-08 2.678   0.59
1.50E-04 16.543  1.8
2.50E-04 8.544   2.1
3.50E-04 2.926   2.4
4.50E-04 2.704   1.9
5.50E-04 4.702   3.0
6.50E-04 3.512   2.6
7.50E-04 1.775   2.5
8.50E-04 2.892   1.9
9.50E-04 4.061   2.4
1.50E-03 1.877   2.1
2.50E-03 1.399   2.1
3.50E-03 1.157   2.0
4.50E-03 0.901   1.9
5.50E-03 0.890   2.0
6.50E-03 0.843   2.0
7.50E-03 0.747   2.0
8.50E-03 0.644   1.9
9.50E-03 0.684   2.0
1.50E-02 0.591   1.9
2.00E-02 0.530   1.9
2.40E-02 0.472   1.9
3.00E-02 0.434   1.9
4.50E-02 0.357   1.9
5.50E-02 0.290   1.9
6.50E-02 0.245   1.9
7.50E-02 0.211   1.9
8.50E-02 0.188   2.0
9.50E-02 0.182   2.1
1.00E-01 0.179   2.2
1.20E-01 0.164   2.1
1.50E-01 0.141   2.0
1.70E-01 0.139   2.2
1.80E-01 0.129*  3.6
1.90E-01 0.127*  2.5
2.00E-01 0.129*  2.3
2.10E-01 0.130*  2.6
2.20E-01 0.126*  2.6
2.30E-01 0.123*  2.3
2.35E-01 0.121*  3.1
2.40E-01 0.118*  2.9
2.45E-01 0.116*  2.5
2.50E-01 0.116*  2.8
2.60E-01 0.115*  2.3
2.70E-01 0.115*  2.9
2.80E-01 0.115*  2.5
3.00E-01 0.115*  2.3
3.25E-01 0.113*  2.8
3.50E-01 0.109*  2.4
3.75E-01 0.107*  2.4
4.00E-01 0.106*  2.1
4.25E-01 0.106*  3.3
4.50E-01 0.106*  2.4
4.75E-01 0.106*  5.4
5.00E-01 0.108*  2.1
5.20E-01 0.108*  2.5
5.40E-01 0.109*  2.4
5.70E-01 0.114*  2.3
6.00E-01 0.113*  2.1
6.50E-01 0.113*  3.3
7.00E-01 0.118*  2.5
7.50E-01 0.118*  3.2
8.00E-01 0.119*  2.2
8.50E-01 0.124*  5.1
9.00E-01 0.126*  2.8
9.40E-01 0.129*  2.8
9.60E-01 0.135   2.7
1.00E+00 0.128   2.7
1.10E+00 0.113*  3.2
1.25E+00 0.0943* 3.1
1.40E+00 0.0802* 3.3
1.60E+00 0.0669* 3.2
1.80E+00 0.0568* 3.9
2.00E+00 0.0478* 3.7
2.20E+00 0.0385  3.8