InformaApp - Publikationen

Measured and calculated transition probabilities, oscillator strengths, and wavelengths for Cu I atomic transitions and measured and calculated lifetimes of Cu I states are tabulated. Data published from 1957 to mid-1994 are covered in this compilation.

Elektrotechnik und Medientechnik

Zeitschriftenartikel

Martin Jogwich, C. Carlhoff, C.-J. Lorenzen

Analyse von Kunststoffen durch laserinduzierte Emissionsspektralanalyse

Laser-Praxis, vol. 10, pp. 86-88

1994

Elektrotechnik und Medientechnik

Beitrag (Sammelband oder Tagungsband)

Martin Jogwich, K. Fu, et al.

Atomic Transition Probabilities and Lifetimes for the Cu I System

Bericht 30-A7-93 des Sonderforschungsbereichs "Physikalische Grundlagen der Niedertemperaturplasmen"

1993

Elektrotechnik und Medientechnik

Zeitschriftenartikel

Martin Jogwich, C. Carlhoff, C.-J. Lorenzen, U. Hahn

Application of Laser-Induced Emission Spectral Analysis for Industrial Process and Quality Control

Journal of Analytical Atomic Spectrometry, vol. 7, no. 6, pp. 1029-1035

1992

DOI: 10.1039/JA9920701029

Abstract anzeigen

Laser-induced emission spectral analysis (LIESA, a registered trademark of instruments developed by Krupp), better known in the literature as laser microanalysis or laser-induced breakdown spectroscopy, is a suitable method for the direct in-process measurement of elemental concentrations in various solid and liquid materials. This method has been developed recently by Krupp for in-process quality assurance and process control in different industrial branches such as steel production and plant making. As a result several LIESA instruments have already been developed or are under development for marketing. In all cases on-line and in-process elemental analysis of materials at various stages of production yield information on the quality of the material and the fabrication process. The beam of a pulsed high-power laser (irradiance: 1 × 108–5 × 109 W cm–2), focused onto the solid or liquid sample surface in an ambient gas atmosphere of normal pressure (focus area≈ablation area, 0.1–6 mm2), produces a hot bright plasma (early electron temperatures, 20000–30000 K). The emitted plasma light is observed end-on and passes by way of an optical fibre bundle to a spectrometer, where it is detected in the focal plane by means of an optical multichannel analyser with high time resolution (on the microsecond scale). A fast computer evaluates the measured spectra and calculates the element concentrations via calibration procedures. Relative detection limits of between 10 and 100 ppm can be achieved for most of the detectable elements in various matrices (steel, rubber, rock and glass). Procedures are available to convert relative measurements with relative standard deviations of between 1 and 2% into absolute concentration values with relative accuracies of about 3%.

Elektrotechnik und Medientechnik

Zeitschriftenartikel

Martin Jogwich, B. Huber, K. Wiesemann

A Spectroscopic Study of Double Electron Transfer from Cu to ArIII in an ECR-Microwave Discharge

Zeitschrift für Physik D: Atoms, Molecules and Clusters, vol. 17, no. 3, pp. 171-179

1990

Abstract anzeigen

We present spectroscopic measurements of rate coefficients for the population of the ArI 6d[3/2] o and 8s[3/2] o states by two electron transfer from sputtered Cu to Ar2+ in an ECR microwave discharge. Rate coefficients are obtained from absolutely measured line intensities using a modified corona model. Though the binding energies of these states differ by 8 meV only the probability of populating the 6d level exceeds by a factor of ten that of populating the 8s level. This is attributed to an energy resonance between the two electrons when promoting to their final levels. The cross section for this two electron transfer comes out to be of the order of 10−15 to 10−14 cm2.

Elektrotechnik und Medientechnik

Vortrag

Martin Jogwich

Bestimmung der Ratenkoeffizienten von Zweielektronen-Transferprozessen zwischen Cu und Ar2+ in einer EZR-Entladung

DPG-Frühjahrstagung/Verhandlungen DPG 3/1990 P-9.1, München

1990

Elektrotechnik und Medientechnik

Beitrag (Sammelband oder Tagungsband)

Martin Jogwich, et al.

Selective Population of the Ar I 6d[3/2]0 Level by Two Electron Transfer from Copper

Posterpräsentation

Proceedings of the International Conference on Phenomena in Ionized Gases (ICPIG) XIX, Belgrad, Jugoslawien, 1989