Analytic approximations to form factors

摘要: Analytical constants are presented which describe the magnetic form factors for firstgroup transition elements, their ions, and some rare-earth ions. Functions peak at sin θ/λ = 0 represented by a function A exp (−ax2) +B (−bx2) + C, where x is θ/λ. Contributions such as (j2) (j4) etc., zero 0, [A (− ax2) B bx2) C]x2. An estimate goodness of fit between its analytic approximation given each case.