7 Source of uncertainty Uncertainty (%) $^{197}$Au $^{102}$Pd $^{120}$Te → g $^{120}$Te → m $^{130}$Ba a $^{132}$Ba → m $^{132}$Ba → g+m $^{156}$Dy Gold cross section 1.4 b – – – – – – – Isotopic abundance – 1.0 0.9 0.9 0.9 1.0 1.0 5.4 Detector efficiency 2.0 2.0 Divergence of flux – 2.0 Sample mass 0.2 – – – – – – 0.1 γ -Ray intensity 0.1 3.1 3.1 0.1 1.5/1.4 3.4 0.3 3.2 γ -Ray self-absorption – 0.2 Summing corrections – 0.4 – – – – 0.4 – Counting statistics 0.1 - 1.0 0.3 - 0.6 0.4 - 0.8 2.0-2.6 0.4 - 1.4 2.6 - 3.1 1.2 - 1.4 1.2 - 2.4 Total uncertainty c 4.8 4.8 4.1 - 4.5 3.7 - 4.0 5.4 - 5.8 3.6 - 3.9 7.3 - 7.6 TABLE V: Compilation of uncertainties. a γ -Ray lines at 216 and 373 keV. b Not included in final uncertainty, see text. c Including the respective uncertainty of gold (2.0-2.2%). Sample 〈 σ$_{exp}$ 〉 [mbarn] E$_{γ}$ = 216 keV 373 keV ba-1 724 ± 29 737 ± 29 ba-2 748 ± 29 752 ± 30 ba-3 718 ± 27 743 ± 29 Weighted average 736 ± 29 Sample 〈 σ$_{exp}$ 〉 [mbarn] E$_{γ}$ = 357 keV pd-1 374 ± 18 pd-2 357 ± 17 pd-3 403 ± 19 Weighted average 376 ± 17 TABLE VIII: Measured (n, γ ) cross sections of $^{130}$Ba and total uncertainties. TABLE VI: Measured (n, γ ) cross sections of $^{102}$Pd and total uncertainties. Sample 〈 σ$_{exp}$ 〉 [mbarn] → $^{133}$Batot → $^{133}$Bam E$_{γ}$ = 356 keV 276 keV ba-1 396.0 ± 15.2 32.7 ± 1.9 ba-2 403.9 ± 15.6 39.6 ± 2.3 ba-3 381.8 ± 13.7 35.4 ± 1.9 Weighted average 392.8 ± 14.8 35.5 ± 2.0 Sample 〈 σ$_{exp}$ 〉 [mbarn] → $^{121}$Teg → $^{121}$Tem E$_{γ}$ = 573 keV 212 keV te-1 474.4 ± 22.9 66.6 ± 2.8 te-2 465.5 ± 22.4 70.1 ± 2.9 te-3 484.0 ± 23.2 66.5 ± 2.8 te-4 462.2 ± 22.3 65.7 ± 2.9 te-5 468.2 ± 22.7 69.4 ± 3.1 Weighted average 470.6 ± 22.7 67.6 ± 2.9 Total (n, γ ) cross section 538.2 ± 25.6 TABLE IX: Measured (n, γ ) cross sections of $^{132}$Ba and total uncertainties. TABLE VII: Measured (n, γ ) cross sections of $^{120}$Te and total uncertainties. half life of $^{133}$Bag ( t$_{1}$$_{/}$$_{2}$ = 10 . 52 yr). The partial cross section to the isomer $^{133}$Bam was measured via the 276 keV line (99.99% IT) to 〈 σ$_{exp}$ 〉 m = 35 . 5 ± 2 . 0 mbarn. The EC part of the isomeric decay is only 0.0096% and was, therefore, neglected. The total capture cross sec- tion of 〈 σ$_{exp}$ 〉 = 393 ± 15 mbarn was determined via the strongest transition in the EC decay to $^{133}$Cs at 356.0 keV (Table IX). The (n, γ ) cross section of $^{156}$Dy was measured via the strongest line in the decay of $^{157}$Dy at 326 keV. The uncertainty of the measured value 〈 σ$_{exp}$ 〉 = 1641 ± 117 mbarn (Table X) is dominated by the contributions from the γ -ray intensity (3.2%) and from the isotopic abun- dance (5.4%). E. $^{156}$Dy(n, γ ) $^{157}$Dy