||It has been suggested that this article be merged with Photodisintegration. (Discuss) Proposed since July 2011.|
|This article does not cite any references or sources. (April 2010)|
Very high energy gamma rays have been shown to induce fission in elements as light as tin Gamma radiation of more modest energies, in the low tens of MeV, can induce fission in traditionally fissile elements like uranium, plutonium, and neptunium.  Experiments have been conducted with much higher energy gamma rays, finding that the photofission cross section doesn't vary much within ranges in the low GeV range 
Photodisintegration (also called phototransmutation) is a similar but different physical process, in which an extremely high energy gamma ray interacts with an atomic nucleus and causes it to enter an excited state, which immediately decays by emitting a subatomic particle.
- Delayed neutron yields and spectra from photofission of actinides with bremsstrahlung photons below 20 MeV. D Doré et al 2006 J. Phys.: Conf. Ser. 41 241
- Phys. Rev. Lett. 84, 5740–5743 (2000) Photofission of Heavy Nuclei at Energies up to 4 GeV