Appendix A4: 235 U-Fueled ADS Core in Medium-Fast Spectrum
343
A4.4.3 Reaction Rates of Activation Foils
See (Tables A4.55, A4.56 and A4.57).
Table A4.55 Main characteristics and description of activation foils (Ref. [1])
Reaction
Dimension
[mm]
Threshold
[MeV]
Half-life
γ-ray
Energy
[keV]
Emission rate
(%)
197 Au(n, γ) 198 Au
(bare and Cd*
covered)
8 mm diam.
0.05 mm thick
-
2.697 d
411.9
95.51
Cd plate
10 mm diam. 1
mm thick
-
-
-
-
115 In(n, γ) 116m In
(wire)
1 mm diam. 680
mm long
-
54.12 m
416.9
1097.3
1293.54
32.4
55.7
85.0
115 In(n, n ) 115m In
(foil; Pb–Bi
target)
10 × 10 × 1
0.3
4.486 h
336.2
45.08
58 Ni(n, p) 58 Co
10 × 10 × 1
0.9
70.82 d
810.8
99.4
56 Fe(n, p) 56 Mn
10 × 10 × 1
5.0
2.578 h
846.8
1810.7
98.9
27.2
27 Al(n, α) 24 Na
10 × 10 × 1
5.6
14.96 h
1368.6
100
93 Nb(n, 2n) 92m Nb
(T target)
10 × 10 × 1
9.0522
10.15 d
934.4
99.2
Cd*: Au foil (Cd covered) was sandwiched between two Cd plates (10 mm diam. and 1 mm thick).
Table A4.56 Measured reaction rates in Cases 3-D to 6-D (Ref. [1])
Measured reaction rate [s −1 cm −3 ]
Reaction
Case 3-D
Case 4-D
Case 5-D
Case 6-D
197 Au(n, γ) 198 Au
(bare)
(9.657 ±
0.382)E+04
(5.065 ±
0.242)E+04
(3.670 ±
0.150)E+04
(2.051 ±
0.083)E+04
197 Au(n, γ) 198 Au (Cd) (6.514 ±
0.310)E+04
(4.083 ±
0.169)E+04
(1.780 ±
0.092)E+04
(2.041 ±
0.087)E+04
115 In(n, n ) 115m In
(1.778 ±
0.101)E+02
(2.087 ±
0.109)E+02
(1.331 ±
0.057)E+02
(1.389 ±
0.058)E+02
58 Ni(n, p) 58 Co
–
–
–
–
56 Fe(n, p) 56 Mn
(8.056 ±
0.665)E+00
(1.895 ±
0.266)E+00
–
–
27 Al(n, α) 24 Na
(5.507 ±
0.701)E+00
(2.676 ±
0.473)E+00
–
–
93 Nb(n, 2n) 92m Nb (T
target)
(2.801 ±
0.114)E+02
(4.765 ±
0.176)E+02
(6.652 ±
0.297)E+02
(6.533 ±
0.260)E+02