A recent rejuvenation of experimental and theoretical interest in the physics of few-body
systems has provided deep, fundamental insights into a broad range of problems. Few-body …

Multichannel atomic spectra frequently exhibit such extraordinary visual complexity that they
appear at first glance to be uninterpretable. The present review discusses how to unravel …

Developments in the application of hyperspherical coordinates in a unified treatment of
bound states and resonances of two-electron atomic systems and other general Coulomb …

Since the first attempts to calculate the helium ground state in the early days of Bohr-
Sommerfeld quantization, two-electron atoms have posed a series of unexpected …

We combine accurate measurements at low energies and theoretical calculations at high
energies to construct sets of photoionization cross sections of He and H 2 that should be …

We describe extensive results on the 1 P o double-excitation resonances of He below the
N= 2–9 ionization thresholds obtained recently by high-resolution photoionization …

Using theoretical results from complex rotation calculations and data from experimental
photoionization cross sections, the quantum defects, the widths, the oscillator strengths and …

Using a dual laser plasma technique we have measured for the first time the
photoabsorption spectrum of atomic lithium at energies corresponding to the simultaneous …

We present an ab initio calculation of the ionization cross section of atomic hydrogen near
threshold with precision that compares excellently with the Shah-Elliot-Gilbody experiment …

Abstract Mandelshtam, Ravuri, and Taylor [Phys. Rev. Lett. 70, 1932 (1993)] have recently
proposed a novel approach for the calculation of resonance states in one-and two-channel …