Table 1 Summary of irradiations used to determine the cross section (σ) of 39K(n,p)39Ar in the energy range of 1.2 to 3.2 MeV.

No.TargetNeutron
source
Energy
(MeV)
Duration
(hours)
39K
(mol)
Monitor
reaction
Monitor σ
(mb)*
Fluence
(cm−2 s−1)
39Ar
(mol)
39K(n,p) σ
(mb)
1KBrHFNG2.75 ± 0.026.12.010 ± 0.001 × 10−3115In(n,n′)115mIn345 ± 102.90 ± 0.104 × 10111.03 ± 0.010 × 10−16177 ± 7
2aKBrLICORNE2.96
(+0.19/−0.16)
6.09.6383 ± 0.0048 × 10−3115In(n,n′)115mIn293 ± 122.08 ± 0.075E × 10104.99 ± 0.051 × 10−17249 ± 9
2bKBrLICORNE1.46
(+0.15/−0.14)
9.49.6005 ± 0.0048 × 10−3115In(n,n′)115mIn163.1 ± 6.53.83 ± 0.14 × 10101.61 ± 0.027 × 10−1744 ± 2
2cKBrLICORNE1.54
(+0.36/−0.29)
18.49.3352 ± 0.0046 × 10−3115In(n,n′)115mIn184.4 ± 7.44.72 ± 0.17 × 10101.00 ± 0.029 × 10−1723 ± 1
2dKBrLICORNE1.94
(+0.33/−0.28)
15.29.4607 ± 0.0047 × 10−3115In(n,n′)115mIn213.3 ± 8.52.10 ± 0.076 × 10102.24 ± 0.038 × 10−17112 ± 4
3bK glassHFNG2.589 ± 0.011210.25.1211 ± 0.0013 × 10−558Ni(n,p)58Co124.7 ± 9.47.55 ± 0.27 × 10124.17 ± 0.049 × 10−17108 ± 4
3cK glassHFNG2.613 ± 0.024210.21.2366 ± 0.0003 × 10−458Ni(n,p)58Co128.6 ± 9.43.31 ± 0.12 × 10125.30 ± 0.058 × 10−17130 ± 5
3dK glassHFNG2.542 ± 0.007210.22.0614 ± 0.0005 × 10−458Ni(n,p)58Co116.9 ± 9.75.37 ± 0.19 × 10112.12 ± 0.032 × 10−17191 ± 7
3eK glassHFNG2.431 ± 0.017210.22.9220 ± 0. 0008 × 10−458Ni(n,p)58Co100.6 ± 7.65.67 ± 0.20 × 10118.49 ± 0.094 × 10−17512 ± 19
3fK glassHFNG2.382 ± 0.007210.22.0153 ± 0.0005 × 10−458Ni(n,p)58Co94.4 ± 7.51.59 ± 0.057 × 10121.28 ± 0.013 × 10−16399 ± 15

*Based on the simulated neutron spectra (Fig. 5) and cross section data from (21).