Metastable autoionizing three- and four-electron states in beryllium

1 August 1975

journal article
Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics

Vol. 8 (11) , L253-L258
https://doi.org/10.1088/0022-3700/8/11/012

Abstract

A group of metastable autoionizing levels in beryllium has been observed after Be⁺ ion bombardment of 7 mu g cm^-2 thin carbon foils at 300 keV incident ion energy. Two peaks appearing at 102.7 and 106.7 eV are interpreted to be related to the Auger decay of the Be I(1s2s2p²) ⁵P^e term. Lifetimes of the (1s2p ²) ⁴P^e state in Be II and the (1s2s2p²) ⁵P^e state in Be I have been determined. Different decay mechanisms are discussed.

Keywords

This publication has 11 references indexed in Scilit:

Comparison of doubly-excited helium energy levels, isoelectronic series, autoionization lifetimes, and group-theoretical configuration-mixing predictions with large-configuration-interaction calculations and experimental spectra
Physical Review A, 1975
Atomic physics with ion accelerators — Beam-foil spectroscopy
Physics Reports, 1974
X-ray emission from foil-exited sulphur beams
Physical Review A, 1974
Recent Progress in Studies of Atomic Spectra and Transition Probabilities by Beam-foil Spectroscopy
Physica Scripta, 1974
Auger Spectra of Highly Ionized Oxygen and Fluorine
Physical Review A, 1973
Theory of “Non-Stationary” states in many-electron atoms
Nuclear Instruments and Methods, 1973
Beam-foil studies of energy levels and radiative lifetimes in Be I and Be II
Nuclear Instruments and Methods, 1973
Energies and Lifetimes of the Metastable Autoionizing $(1 s 2 s 2 p) {}^{4}P_{J}$ States of ${Li}^{6}$ and ${Li}^{7}$ ; Assignment of Li- $I^{b}$ Quartet Lines
Physical Review Letters, 1968
Variational Calculations for Quartet States of Three-Electron Atomic Systems
Physical Review B, 1967
Classification of Two-Electron Excitation Levels of Helium
Physical Review Letters, 1963