Dingchang Xian, Chinese nuclear physicist (Guangzhou, Guandong Province 15 August 1935 – With Junyan Chen et al. first to use synchrotron radiation for a nondestructive study of fossil internal structure (2006) With X.D. Su, Y. Liang, L. Li et al. presented a large scale, high efficiency and lowcost platform for structural genomics studies (2006) With C. Shi, Y. Jing, H.L. Lu & D.S. Li designed an invacuum multipole wiggler (2001) With L.Y. Zhang presented a special case of nondetrapping variable parameter wiggler of free electron lasers (1991) With X.H. He developed a cumulant variation method in lattice gauge field theory (1985) Proposed EXAFS (extended xray absorption fine structure) experiment with squared radian x ray photo acoustics independently Developed a method to calculate the relativistic invariant phase space in particle theory Proposed an analytical continuation method for the calculation of wave function in 4D spacetime SOFTWARES With C.X. Wang. RADID, a software to calculate radiation distributions from insertion devices of onedimensional linearly polarized magnetic fields (1990) With Y. Lange & D. Li. BENT, a software for ray tracing of X rays on bent oblique cut crystals (1990)

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