Gas phase C70 molecules have been ionized with single photons of energies between 16 and 70 eV, and the electron spectra measured with velocity map imaging in coincidence with the ions. The doubly ionized and unfragmented species was present at photon energies of 22 eV and up, and triply charged ions were present from 55 eV. The low-kinetic-energy parts of the spectra are explained with thermal emission of transient hot electrons. We propose a generally applicable mechanism, named resonance ionization shadowing, for the creation of hot electrons by absorption of above-threshold energy photons.
Single-photon hot-electron ionization of C70 / Andersson, Åke; Schio, Luca; Richter, Robert; Alagia, Michele; Stranges, Stefano; Ferrari, Piero; Hansen, Klavs; Zhaunerchyk, Vitali. - In: PHYSICAL REVIEW A. - ISSN 2469-9926. - 107:1(2023). [10.1103/PhysRevA.107.013103]
Single-photon hot-electron ionization of C70
Stranges, StefanoMembro del Collaboration Group
;
2023
Abstract
Gas phase C70 molecules have been ionized with single photons of energies between 16 and 70 eV, and the electron spectra measured with velocity map imaging in coincidence with the ions. The doubly ionized and unfragmented species was present at photon energies of 22 eV and up, and triply charged ions were present from 55 eV. The low-kinetic-energy parts of the spectra are explained with thermal emission of transient hot electrons. We propose a generally applicable mechanism, named resonance ionization shadowing, for the creation of hot electrons by absorption of above-threshold energy photons.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
