Nuclear Excitation by Electron Transition and Gamma-Ray Laser

This paper studies nuclear excitation by electron transition (NEET) and is potential application in developing gamma-ray laser.A quantum mechanics formula to calculate NEET probabilities was presented with emphasis on the calculations of the transition matrix elements and discussions of the transition selection rules.The NEET probabilities for a number of nuclides were calculated.The upper limit of NEET probability is evaluated to be about 10^－5.The possibility for applying the technique of NEET in the development of gamma laser was investigated.