On the principle of reciprocity in inelastic electron scattering.
| Autor: | Mendis BG; Department of Physics, Durham University, South Road, Durham, DH1 3LE, United Kingdom. |
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| Jazyk: | angličtina |
| Zdroj: | Acta crystallographica. Section A, Foundations and advances [Acta Crystallogr A Found Adv] 2024 Nov 01; Vol. 80 (Pt 6), pp. 457-459. Date of Electronic Publication: 2024 Oct 21. |
| DOI: | 10.1107/S2053273324009550 |
| Abstrakt: | In electron microscopy the principle of reciprocity is often used to imply time reversal symmetry. While this is true for elastic scattering, its applicability to inelastic scattering is less well established. From the second law of thermodynamics, the entropy for a thermally isolated system must be constant for any reversible process. Using entropy and statistical fluctuation arguments, it is shown that, while reversibility is possible at the microscopic level, it becomes statistically less likely for higher energy transfers. The implications for reciprocal imaging modes, including energy loss and energy gain measurements, as well as Kainuma's reciprocal wave model are also discussed. (open access.) |
| Databáze: | MEDLINE |
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