Digitale Medien
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
74 (1993), S. 5951-5959
ISSN:
1089-7550
Quelle:
AIP Digital Archive
Thema:
Physik
Notizen:
One-dimensional volume diffraction may be analyzed in a manner similar to the problem of an electron subject to a periodic potential. The quantity analogous to the diffraction Nath parameter ρ is then the ratio ΔW0/V, where V is the strength of the electron potential and ΔW0 the spacing between the free-electron-energy eigenstates. The crossover between the Bragg and Raman–Nath diffraction regimes is marked by a violation of the (1/ρ)(very-much-less-than)1 condition, and corresponds to the requirement that (V/ΔW0)(very-much-less-than)1 in order to preclude electron eigenstate mixing. Bound-state perturbation theory as developed for use in quantum mechanics may be applied to the diffraction problem to obtain a (1/ρ) expansion for the intensities of diffracted grating orders.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.355207
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