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A possibility of further development of Synchrotron M\"{o}ssbauer Source(SMS) of $^{57}$Fe 14.4 keV radiation is considered. The principles anddetailed description of the SMS device is given in Refs. Phys. Rev. A 84,053851 (2011) G. V. Smirnov et al, J. Synchrotron Rad., v. 19, 559 (2012) V.Potapkin et al. The perfect crystal of Iron Borate, FeBO$_{3}$, is the centralelement of this device. The coherent nuclear fluorescence of IB crystalilluminated by synchrotron radiation produces the sharply directed beam of 14.4keV M\"{o}ssbauer radiation from the crystal set at the pure nuclear Braggreflection. Up to now the low angle scattering geometry was used for generationof the coherent $\gamma $ radiation. The analysis performed in the presentpaper shows that the source of about two times larger power can be obtainedwhen nearly backward scattering geometry is employed. This result can beefficiently applied in development of high resolution spectroscopy usingsynchrotron radiation.

Coherent emission of $\gamma $ quanta by synchrotron radiation excited nuclei: geometry of nearly backward scattering