Elemental x-ray imaging using Zernike phase contrast

Shao Qi-Gang¹, Chen Jian¹, Wali Faiz¹, Bao Yuan¹, Wang Zhi-Li², Zhu Pei-Ping^{3, †,}, Tian Yang-Chao^{1, ‡,}, Gao Kun^{1, ¶,}

Plots of refractive-index decrement δ and imaginary part β of the refractive index versus energy for different metals (black for Ti, green for Mn, purple for Ni, and red for Zn). Curves are based on Ref. [4].