Application of the borrmann effect: deformed crystals may emit X-ray laser radiation

Solid state X-ray lasers are extremely required because they can generate higher energies and better beam quality, compared to other x-ray lasers already suggested in literature and demonstrated. The anomalous angle of transmission (Borrmann effect) is used to transmit relativistic particles to excite and stimulate the emission of coherent X-ray beams activating a Distributed Feedback (DFB) process in deformed crystals. The deformation in found to generate Zeeman splitting of the states, thus enabling the deformed crystal to operate like a ring laser. The principle described is based on an original idea hinted by Prof. H.Y. Ohtsuki in 1984, but never verified. Our findings are similar to the works of Prof. Mandel of the Groupe de Optique non lineare de l' Universite' Libre de Bruxelles. The paper introduces a semi empirical approach to verify the principle and a subsequent more rigorous quantum optic approach. (author)