Penning ionization of acene molecules by He nanodroplets

Abstract

Acene molecules (anthracene, tetracene, pentacene) and fullerene (C${}_{60}$) are embedded in He nanodroplets (He${}_N$) and probed by EUV synchrotron radiation. When resonantly exciting the He nanodroplets, the embedded molecules M are efficiently ionized by the Penning reaction ${\mathrm{He}}_N^{\ast }+\mathrm{M}\to {\mathrm{He}}_N+{\mathrm{M}}^{+}+e^{-}$. However, the Penning electron spectra are broad and structureless -- showing no resemblance neither with those measured by binary Penning collisions, nor with those measured for dopants bound to the He droplet surface. The similarity of all four spectra indicates that electron spectra of embedded species are substantially altered by electron-He scattering. Simulations based on elastic binary electron-He collisions qualitatively reproduce the measured spectra, but require the assumption of unexpectedly large He droplets.

References in corpus (8)

• Spectroscopy and dynamics in helium nanodroplets
• Density of Superfluid Helium Droplets
• Photoionizaton of Pure and Doped Helium Nanodroplets
• Penning ionization of doped helium nanodroplets following EUV excitation
• EUV ionization of pure He nanodroplets: Mass-correlated photoelectron imaging, Penning ionization and electron energy-loss spectra
• Imaging spectroscopy of rubidium atoms attached to helium nanodroplets
• Enhanced ionization of embedded clusters by Electron Transfer Mediated Decay in helium nanodroplets
• Interatomic Coulombic decay in helium nanodroplets

Cited by in corpus (8)

• Electron transfer mediated decay of alkali dimers attached to He nanodroplets
• Penning Spectroscopy and Structure of Acetylene Oligomers in He Nanodroplets
• Inelastic scattering of photoelectrons from He nanodroplets
• Time-resolved Ultrafast Interatomic Coulombic Decay in Superexcited Sodium-doped Helium Nanodroplets
• Electron energy loss and angular asymmetry induced by elastic scattering in helium droplets
• Efficient Indirect Interatomic Coulombic Decay Induced by Photoelectron Impact Excitation in Large He Nanodroplets
• Secondary ionization of pyrimidine nucleobases and their microhydrated derivatives in helium nanodroplets
• Photoelectron spectroscopy of coronene molecules embedded in helium nanodroplets