MOSSBAUER FILTRATION OF SYNCHROTRON-RADIATION AT AN ISOTOPE INTERFACEWITH A SAW-LIKE LAYER

Mossbauer filtration of Synchrotron Radiation (SR) due to resonant Mos sbauer scattering at an isotope interface (a plane interface between d ifferent isotopes of the same chemical element) under conditions of to tal internal reflection is theoretically investigated. The mentioned s cheme of Mossbauer filtration of SR allows one to suppress the backgro und connected with the nonresonant SR scattering because of the absenc e of reflection at the isotope interface if there is no resonant scatt ering. It is also shown that an additional decrease of the background connected with SR reflection at the vacuum-non-Mossbauer isotope inter face may be achieved if the vacuum-non-Mossbauer isotope interface has a saw-like profile. Numerical calculations illustrating advantages of the proposed scheme of SR Mossbauer filtration are carried out for a Fe-56/Fe-57 isotope interface.