Heisenberg's uncertainty principle in the PTOLEMY project: A theory update

A Apponi, MG Betti, M Borghesi, A Boyarsky, N Canci… - Physical Review D, 2022 - APS
We discuss the consequences of the quantum uncertainty on the spectrum of the electron
emitted by the β-processes of a tritium atom bound to a graphene sheet. We analyze …

Direct searches for general dark matter-electron interactions with graphene detectors: Part I. Electronic structure calculations

R Catena, T Emken, M Matas, NA Spaldin… - Physical Review …, 2023 - APS
We develop a formalism to describe electron ejections from graphenelike targets by dark
matter (DM) scattering for general forms of scalar and spin-1/2 DM-electron interactions, and …

Direct searches for general dark matter-electron interactions with graphene detectors: Part II. Sensitivity studies

R Catena, T Emken, M Matas, NA Spaldin… - Physical Review …, 2023 - APS
We use a formalism that describes electron ejections from graphenelike targets by dark
matter (DM) scattering for general forms of scalar and spin-1/2 DM-electron interactions in …

Absolute efficiency of a two-stage microchannel plate for electrons in the 30–900 eV energy range

A Apponi, F Pandolfi, I Rago, G Cavoto… - Measurement …, 2021 - iopscience.iop.org
We report on an apparatus able to measure the absolute detection efficiency of a detector for
electrons in the 30–900 eV range. In particular, we discuss the characterisation of a two …