106 research outputs found
Auger Resonance Decay Process in Ar 2p Shell Excitation and Ionization
The production and subsequent autoionization of the Ar+ (1D2)6d1 satellite state that is formed either by shake-up or recapture during the Auger decay of a 2p vacancy in Ar has been studied by photoelectron spectroscopy in the energy region from 243 to 256 eV. The creation of near zero energy electrons below and immediately above the Ar 2p ionization threshold is discussed. Some ambiguous points in previous studies are clarified
Network structure of vertebrate scavenger assemblages at the global scale: drivers and ecosystem functioning implications
publishedVersio
The Caravan Rolls On
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/68409/2/10.1177_107554707900100103.pd
Resistência anti-helmíntica em nematoides gastrintestinais de pequenos ruminantes: avanços e limitações para seu diagnóstico
Inelastic photoproduction of J/Psi mesons at HERA
An analysis of inelastic photoproduction of J/Psi mesons is presented using data collected at the ep collider HERA corresponding to an integrated luminosity of above 80pb-1. Differential and double differential cross sections are measured in a wide kinematic region: 6
Magnetohydrodynamic Oscillations in the Solar Corona and Earth’s Magnetosphere: Towards Consolidated Understanding
Precision Measurements of the Total Photoionization Cross Sections of He, Ne, Ar, Kr, and Xe
Absolute photoionization cross-sections for the rare gases have been measured from threshold to 125 eV with an accuracy of ±1 to 3% and are presented in both tabular and graphical form. These data are compared with the optical oscillator strength measurements of Brion and co-workers, who used the Dipole (e, e) collision technique
Dissociative photoionization of N2 and O2 from 100 to 800 eV
We report measured partial cross sections for the fragments from dissociative photoionization of N2 and O2 over the photon energy range of 100 to 800 eV. The partial cross sections were found to follow a power law of the form (hv)-α, where hv is the incident photon energy. The exponent, a, is shown to be near 2.7 for N+2 and for all N2 partial cross sections above the nitrogen K-edge. An exponent of 3.0 was found for O+2 and for all O2 partial cross sections above the oxygen K-edge
Dissociative Photoionization Study of O2
Dissociative photoionization of O2 is studied by an energy–mass analyzing system and synchrotron radiation. The kinetic energy distribution spectra of the O+ ion fragments and the dissociative photoionization efficiency curves for the O+ fragments with zero and 0.8 eV kinetic energies are observed at photon energies from 18.5 to 24.7 eV. Two vibrational progressions are observed in the zero kinetic energy O+ spectrum and identified as Rydberg series nsơg (n = 4 and 5) converging to the 32IIu ionic state of O2. The spectroscopic constants for these Rydberg states are obtained. Post dissociative autoionizations are observed for the O*(2P)ndn(n = 3~5) atomic states in the zero kinetic energy O+ spectrum. A shape resonance structure for the B2S− G ionic state is observed in the 0.8 eV kinetic energy O+ spectrum. The related dissociation mechanisms are discussed
- …