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New results of atomic structure and atomic lifetime measurements in highly-ionized few-electron atoms obtained using position-sensitive detection of extreme ultraviolet emission from excited fast ions are reported. Data are presented from experiments run at the Notre Dame Tandem Accelerator and at the Argonne ATLAS facility using beam foil spectroscopy with a photon-counting position-sensitive imaging detector. The results include excited state lifetimes in Si XI and Si XII involving both resonance transitions and Rydberg transitions, spectra of highly-ionized He-like, Li-like, and Be-like nickel including comparisons of electron capture and excitation processes for charge selected beams, and spectra and lifetimes in highly-charged bromine ions for both allowed and forbidden transitions. 4 figs, 3 refs.
Some 125 papers discuss such topics as charge and energy redistribution in low energy ion-atom collisions, single and multiple electron processes in high energy ion-atom collisions, the structure and transition rates of electron ions, electron-ion and ion-ion collisions, experiments with stored or t
Atomic properties of multiply charged ions have been investigated using excitation of energetic heavy ion beams. Spectroscopy of excited atomic transitions has been applied from the visible to the extreme ultraviolet wavelength regions to provide accurate atomic structure and transition rate data in selected highly ionized atoms. High-resolution position-sensitive photon detection has been introduced for measurements in the ultraviolet region. The detailed structures of Rydberg states in highly charged beryllium-like ions have been measured as a test of long-range electron-ion interactions. The measurements are supported by multiconfiguration Dirac-Fock calculations and by many-body perturbation theory. The high-angular-momentum Rydberg transitions may be used to establish reference wavelengths and improve the accuracy of ionization energies in highly charged systems. Precision wavelength measurements in highly charged few-electron ions have been performed to test the most accurate relativistic atomic structure calculations for prominent low-lying excited states. Lifetime measurements for allowed and forbidden transitions in highly charged few-electron ions have been made to test theoretical transition matrix elements for simple atomic systems. Precision lifetime measurements in laser-excited alkali atoms have been initiated to establish the accuracy of relativistic atomic many-body theory in many-electron systems.
The last decade has seen dramatic progress in the development of devices for producing mu1ticharged ions. Indeed it is now pos sible to produce any charge state of any ion right up through 92 fully-stripped uranium (U +). Equally dramatic progress has been achieved in the energy range of the available ions. As an example, fully-stripped neon ions have been produced in useable quantities with kinetic energies ranging from a few ev to more than 20 Gev. Interest in the atomic physics of multicharged ions has grown apace. In the fusion program, the spectra of these ions is an im portant diagnostic tool. Moreover the presence of mu1ticharged ions presents a serious energy loss mechanism in fusion devices. This fact has motivated a program to study the collision mech anisms involved. In another area, mu1ticharged ions are present in the solar corona and the interstellar medium and knowledge of their collision properties and spectra is essential to understand ing the astrophysics. Other possible applications are to x-ray lasers and heavy ion inertial fusion. On a more fundamental level, new possibilities for testing quantum electrodynamics with mu1ti charged ions have emerged.
These comprehensive spectroscopic data tables for the spectra of highly ionized heavy atoms provide a valuable resource for researchers who need detailed spectroscopic information on energy levels, wavelengths, ionization energies, and oscillator strengths. Critically evaluated data for these spectroscopic quantities, both observed and calculated, are tabulated for the elements Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Kr, and Mo. The tables include data for all stages of ionization from Ca-like through H-like spectra, except for Kr and Mo, which start at Ge-like and Rb-like, respectively. Typically, several hundred transitions are covered for each spectrum. The tables are arranged in order of decreasing wavelengths, and lines belonging to the same multiplet are grouped together. Forbidden lines, i.e., mainly magnetic dipole (M1) and electric quadrupole (E2) transitions are also included and are identified as such. A unified finding list, in which lines are ordered according to wavelengths, contains all the tabulated transitions. Short reviews on the line identifications and wavelength measurements are given for each stage of ionization. The general introduction contains a discussion on the method of evaluation and some background on the compilations.
The spectroscopy of highly charged ions plays a key role in numerous areas of physics, from quantum electrodynamics (QED) and parity nonconservation (PNC) testing to fusion and plasma physics to x-ray astronomy. Handbook for Highly Charged Ion Spectroscopic Research brings together many of the techniques and ideas needed to carry out state-of-the-a