電子線廻折における虚数ポテンシヤルについて
1953 年 1953 巻 69 号 p. 118-136
詳細
1953 年 1953 巻 69 号 p. 118-136
The method of introducing imaginary parts in the Fourier coefficients of the periodic potential of crystals is criticized from the view point of the Boru's second approximation for collision problem.Similar formulae as in the X-ray case treated by G.Moriere [Ann. Phys., 35, 272. 297. (1939)] were derived. Since, however, the tensor Chg. representing the correction tarm in the dynamical equation of diffraction is not constant in the vicinity of Bragg reflection, the results are unable to be replaced by a simple complex potential. The main contribution to the difference of damping of the two waves in the case of Bragg reflection comes from the difference if the values of (COO+Chk) /2 at the two dispersion points, and the existence of COh has a rather small role.
