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Introduction.- Related Phenomena.- Schemes for Periodic Bending of Crystals.- Feasability of a Positron-Based Crystalline Undulator.- Positron-Based CU: Illustrative Material.- CUs for Electrons and Heavy Particles.- Experimental Studies of CUR.- Stimulated Emission from CU.-... Read Full Overview

The development of coherent radiation sources for sub-angstrom wavelengths - i.e. in the hard X-ray and gamma-ray range - is a challenging goal of modern physics. The availability of such sources will have many applications in basic science, technology and medicine and in... Read Full Overview