From measuring electron charge to exploring particle-wave duality: A new didactic experimental approach

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.
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Contributor : Evelyne Salançon <>
Submitted on : Wednesday, February 27, 2019 - 12:00:07 PM
Last modification on : Tuesday, March 5, 2019 - 5:04:04 PM

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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⟩

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