The effect of neutron irradiation on photorefractive gratings in LiNb O3: Fe single crystals is studied experimentally. The observed phenomena result from the large effective cross section of Li6 for thermal and cold neutrons and from the large number of the electrons excited to the conduction band by the high kinetic energy that is released during the neutron generated fission of Li6 nuclei. The excited electrons erase the previously recorded holographic grating. The sensitivity threshold of the effect is better than 160 mSv (1.2× 1010 cm-2 fluence) at neutron energy of 0.17 eV. Potential applications of the phenomena are discussed.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)