Difference between radioactive decay and nuclear fission reactions

1.    Difference between radioactive decay and  nuclear fission reactions

Nuclear fission is an artificial phenomenon while radioactive decay is a natural phenomenon

Nuclear fission is induced while radioactive decay occur spontaneously

Nuclear fission involve the splitting of a nucleus as a result of absorption of a particle, in nuclear fission an atom absorb a particle, this particle makes it unstable and eventually split into two unequal nuclides. 

 whereas radioactive decay involve the emission of alpha, beta or gamma rays , a single new atom is formed, no splitting  occur

In nuclear fission neutrons  are produced, this act as projectile in a self-sustained chain reaction whereas radioactive decay only has either  alpha, beta particle  or gamma as products.

Fission reaction requires energy, temperature and pressure to kick start,  the bombarding particles must have enough energy to reach its target where as radioactive decay is indepenedent of energy, pressure or temperature.

Fission reaction produces large energy if when harness can be use for generation of electricity and military weaponry whereas radioactive decay cannot.

 nuclear fission need a reactor, must be controlled and require personnel whereas radioactive decay does not,