A metal having body-centered cubic structure is analyzed through X-ray diffraction using monochromatic X-ray of wavelength 0.154 nm. The diffraction angle (\(2\theta\)) corresponding to \(\{2\,0\,0\}\) plane is \(60^{\circ}\) (for first order reflection).
The atomic radius of this element (rounded off to three decimal places) is ______ nm.