The use of mixed-state ionic beams in collision dynamics investigations is examined. Using high resolution Auger projectile spectroscopy involving He-like (

1 s^{2}^{1} S, 1 s 2 s^{3, 1} S

) mixed-state beams, the spectrum contributions of the

1 s 2 s^{3} S

metastable beam component is effectively separated and clearly identified. This is performed with a technique that exploits two independent spectrum measurements under the same collision conditions, but with ions having quite different metastable fractions, judiciously selected by varying the ion beam charge-stripping conditions. Details of the technique are presented together with characteristic examples. In collisions of 4 MeV B

^{3 +}

with H

_{2}

targets, the Auger electron spectrum of the separated

1 s 2 s^{3} S

boron beam component allows for a detailed analysis of the formation of the

1 s 2 s (^{3} S) n l^{2} L

states by direct

n l

transfer. In addition, the production of hollow

2 s 2 p^{1, 3} P

doubly- and

2 s 2 p^{2}^{2} D

triply-excited states, by direct excitation and transfer-excitation processes, respectively, can also be independently studied. In similar mixed-state beam collisions of 15 MeV C

^{4 +}

with H

_{2}

, He, Ne and Ar targets, the contributions of the

1 s^{2}

1 s 2 s^{3, 1} S

beam components to the formation of the

2 s 2 p^{3, 1} P

states by double-excitation,

1 s \to 2 p

excitation and transfer-loss processes can be clearly identified, facilitating comparisons with theoretical calculations.

Atoms, Volume 6, Issue 4

Articles (17)

Measurements of the Neutron Lifetime

Advanced Helical Plasma Research towards a Steady-State Fusion Reactor by Deuterium Experiments in Large Helical Device

Transverse Momentum Transfer Distributions Following Single Ionization in 3.6 MeV/amu Au53+ + He Collisions: A 4-Body Classical Treatment

High Temperature Optical Spectra of Diatomic Molecules at Local Thermodynamic Equilibrium

Mixed-State Ionic Beams: An Effective Tool for Collision Dynamics Investigations

The Influence of Secondary Electron Emission and Electron Reflection on a Capacitively Coupled Oxygen Discharge

Coherence-Length Effects in Fast Atom Diffraction at Grazing Incidence

Degree-Distance Based Topological Indices of Crystal Cubic Carbon Structure

Hyperfine Anomalies in Gd and Nd

Atomic and Molecular Processes in a Strong Bicircular Laser Field

X-ray Spectroscopy Based Diagnostic of GigaGauss Magnetic Fields during Relativistic Laser-Plasma Interactions

Microcalorimeters for X-Ray Spectroscopy of Highly Charged Ions at Storage Rings

Iron X-ray Transmission at Temperature Near 150 eV Using the National Ignition Facility: First Measurements and Paths to Uncertainty Reduction

Erratum: Raineri 1,*, M.; Mejia Castellanos 2, R. E.; Gallardo 1, M.; Reyna Almandos 1, J. Extended Analysis of Ar III and Ar IV. Atoms 2018, 6, 47

The Unified Theory of Resonance Energy Transfer According to Molecular Quantum Electrodynamics

A New Procedure to Determine the Plasma Parameters from a Genetic Algorithm Coupled with the Spectral Line-Shape Code PPP

Progress in Finding New Energy Levels Using Laser Spectroscopy

Transverse Momentum Transfer Distributions Following Single Ionization in 3.6 MeV/amu Au⁵³⁺ + He Collisions: A 4-Body Classical Treatment

Erratum: Raineri ^1,, M.; Mejia Castellanos ², R. E.; Gallardo ¹, M.; Reyna Almandos ¹, J. Extended Analysis of Ar III and Ar IV. Atoms* 2018, 6, 47