Angular Distributions of Molecular Photofragments Emitted followingK-Shell Excitation ofN2

Photoionization mass spectrometry of kinetic energy-selected ions. The translational energy distribution of N+ /N2 in the inner-shell ionization energy range

“…On the other hand, at λ= 3.05 nm (404.8 eV) no thermal ion peak is observed. The present data are compared to the kinetic energy spectra obtained by Yagishita et al [26] by using a parallel-plate analyzer without mass discrimination. These measurements were performed at 0° and 90° with respect to the polarization direction of the photon beam.…”

“…Without mass selection, Yagishita et al [26] observed a kinetic energy distribution peaking at 1.5 eV for 2.95 nm (419 eV) photons. They ascribed it to the N 2 2+ (≈60 eV)→N + +N (at 54 eV).…”

Nuclear motion and symmetry breaking of the B 1s-excited BF3 molecule

“…The angle-resolved ion-yield spectroscopy of fragment ions provides information about symmetries of inner-shell excited states of linear molecules [37][38][39], because the direction of the ion ejection relative to the polarization vector E reflects the direction of the dipole moment relative to the molecular axis. This type of measurements, called symmetry-resolved absorption spectroscopy [40][41][42], relies on the fact that the core-hole decay and fragmentation occur much faster than the molecular rotation, and thus the axial-recoil approximation [43,44] is valid.…”

Atomic and molecular science with synchrotron radiation

“…New observations of ion angular distributions from free molecules (Yagishita et al, 1989) suggest that de tailed information on alignment processes follow"ng x-ray absorp tion can be monitored in a unique way. Angle-resolved measure ments on ions are much less efficient than integral measurements, thus requiring a much more intense x-ray source.…”