Is x-ray emitted in nuclear fission/fusion?

x-rays are photons that are emitted due to the transitions of electrons between orbits. In the fission of U235 about 7 MeV worth of gamma rays (which are also photons) are promptly emitted. Generally then we talk about gammas being emitted from fission and not X-rays. read more

In nuclear physics and nuclear chemistry, nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei). The fission process often produces free neutrons and gamma photons, and releases a very large amount of energy even by the energetic standards of radioactive decay. read more

The two types of nuclear reactions used to produce energy are fission and fusion. In a fission reaction, a heavy atomic nucleus is split into smaller nuclei, other particles and radiation. In a typical reaction, an atom of uranium 235 absorbs a neutron and splits into two lighter atoms, barium and krypton, emitting radiation and neutrons. read more