The spectral of the rare earths have been photographed under controlled excitation so that either the spectra of the doubly or triply ionized elements are brought out with maximum intensity. A mild excitation is used in addition to give the first and second spectra for comparison. Some regularities are immediately apparent and vary very gradually through the rare-earth group. The general features of the spectra are discussed in this paper.
This is the first high resolution measurement of the electron energy spectrum from high intensity above-threshold ionization (pondermotive energy \ensuremath{\gg} ionization pot...
Nonrelativistic and quasirelativistic energy-adjusted ab initio pseudopotentials substituting the 1s–3d core orbitals with corresponding spin–orbit operators for the rare earth ...
In a previous paper by the present authors the theory of Anstee and O'Mara for the broadening of spectral lines of neutral atoms by collisions with hydrogen atoms was extended t...
We have measured the ion yields for helium ionized by 120 fs, 614 nm laser pulses for intensities near ${10}^{16}$ W/${\mathrm{cm}}^{2}$. We have found that for these ultrashort...
Studies of multiphoton ionization of noble gases have been carried out using 1-\ensuremath{\mu}m, 1-ps laser pulses with intensities up to the mid- ${10}^{16}$ W/${\mathrm{cm}}^...
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