group  half - life (s)  decay constant (s 1 )  yield , neutrons per fission  fraction
0      1           55.720                 0.0124                       0.00052  0.000215
1      2           22.720                 0.0305                       0.00546  0.001424
2      3            6.220                 0.1110                       0.00310  0.001274
3      4            2.300                 0.3010                       0.00624  0.002568
4      5            0.614                 1.1400                       0.00182  0.000748
5      6            0.230                 3.0100                       0.00066  0.000273

Table as JSON:
{"group":{"0":1,"1":2,"2":3,"3":4,"4":5,"5":6},"half - life (s)":{"0":55.72,"1":22.72,"2":6.22,"3":2.3,"4":0.614,"5":0.23},"decay constant (s 1 )":{"0":0.0124,"1":0.0305,"2":0.111,"3":0.301,"4":1.14,"5":3.01},"yield , neutrons per fission":{"0":0.00052,"1":0.00546,"2":0.0031,"3":0.00624,"4":0.00182,"5":0.00066},"fraction":{"0":0.000215,"1":0.001424,"2":0.001274,"3":0.002568,"4":0.000748,"5":0.000273}}