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Abstract : This paper points out the strong didactic potential of an experiment originally intended for electron source research. Using a dual stage micro-channel plate in a low-energy electron point projection microscope, electrons are spatially detected one by one. Field electron emission affords wide-ranging intensity enabling the electron charge to be determined by comparing counting and analog measurements. The same setup is used to illustrate buildup of an interference pattern from separate low-energy electron detection, thereby enabling the Planck constant to be determined. Both granular and continuous signals are directly observable in this educational approach.
https://hal-amu.archives-ouvertes.fr/hal-02043197 Contributor : Evelyne SalançonConnect in order to contact the contributor Submitted on : Wednesday, February 27, 2019 - 12:00:07 PM Last modification on : Wednesday, November 3, 2021 - 6:41:32 AM
E. Salançon, Alain Degiovanni, Laurent Lapena, Roger Morin. From measuring electron charge to exploring particle-wave duality: A new didactic experimental approach. American Journal of Physics, American Association of Physics Teachers, 2019, 87 (3), pp.194-199. ⟨10.1119/1.5086392⟩. ⟨hal-02043197⟩