Variable-frequency nuclear monochromator using single-line pure nuclear Bragg reflection of oscillating FeBO single crystal

Mitsui, Takaya; Seto, Makoto; Masuda, Ryo

A variable-frequency Fe nuclear monochromator has been developed using a pure nuclear Bragg reflection from an oscillating FeBO single crystal at the Nel temperature. The Doppler-shifted single-line Fe Mssbauer radiation at a fixed beam position was successfully filtered using the third-generation synchrotron radiation (SR) of SPring-8. We describe the principle of the variable-frequency Mssbauer filtering technique, the study on the beam characteristics, and some demonstrative experiments on energy-domain SR Mssbauer spectroscopy.