Determine the contribution of correlated electronic decay to high-energy electron emission

Determine the contribution of correlated electronic decay to the higher-energy electron emission observed in coincidence with doubly charged helium ions from laser-induced xenon-doped helium nanoplasmas.

Background

The paper distinguishes nanoplasma events dominated by singly charged and doubly charged helium ions. Events associated with doubly charged helium ions exhibit a peak near 0.75 eV in the maximum-electron-kinetic-energy distribution, whereas singly charged-ion-dominated events predominantly produce low-energy electrons.

The authors identify correlated electronic decay between excited nanoplasma ions as one possible mechanism for producing electrons at a specific kinetic energy in coincidence with doubly charged helium ions. However, the velocity-map-imaging spectrometer has limited energy acceptance and the yield of high-energy electrons is low, so the relevant electrons were not detected and the contribution of this pathway remains unresolved.

References

Correlated decay would also be expected to produce an electron with a higher kinetic energy. Such electrons were not detected, owing to the VMI spectrometer's limited energy acceptance and the much lower yield of high-energy electrons. The present measurements therefore leave the contribution of this pathway unresolved.

— Correlated detection of electrons and ions emitted from laser-induced nanoplasmas in doped helium nanodroplets in the single-shot single-cluster regime  (2610.26280 - Sishodia et al., 19 Oct 2026) in Section 3.5, subsection “Electron counts and kinetic energies”