Number
of Delayed Neutrons per Fission
|
Average
half-life ~ T½ (s)
|
U-233
|
U-235
|
Pu239
|
Energy
(MeV)
|
|
56
|
5.7•10-4
|
5.2•10-4
|
2.1•10-4
|
0.25
|
|
23
|
19.7•10-4
|
34.6•10-4
|
18.2•10-4
|
0.46
|
|
6.2
|
16.6•10-4
|
31.0•10-4
|
12.9•10-4
|
0.41
|
|
2.3
|
18.4•10-4
|
62.4•10-4
|
19.9•10-4
|
0.45
|
|
0.61
|
3.4•10-4
|
18.2•10-4
|
5.2•10-4
|
0.41
|
|
0.23
|
2.2•10-4
|
6.6•10-4
|
2.7•10-4
|
|
|
Total
delayed neutrons
|
0.0066
|
0.0158
|
0.0061
|
|
|
Total
fission neutrons
|
2.5
|
2.43
|
2.90
|
|
|
Delayed
neutrons fraction
|
0.0026
|
0.0065
|
0.0021
|
|
|