Inductively coupled plasmas (ICP) offer promise as atomization cells for atomic fluorescence spectrometry (AFS). In this study, an ICP formed part of a modular spectroscopic system for atomic fluorescence, emission, and absorption measurements. Details on the assembly of the complete system are provided. Mlcrowave-excited, thermostated, electrodeless dlscharge lamps were used as prlmary sources...

Atomic spectrometry and electrochemistry are usually recognized as independent analytical tools used for different purposes. Here, a brief review is given of the advantages of using electrochemistry in the various fields of atomic spectrometry techniques. In the first part, the application of electrochemical preconcentration before the atomic spectrometry will be addressed and exemplified. Elec...

Ultra-thin quantum wells of CdTe and CdSe and fractional monolayer quantum dots of CdSe present very strong excitonic emission covering the red-blue spectral range. They are grown by atomic layer epitaxy and the thickness fluctuations can be completely avoided in many cases by choosing the appropriate substrate temperature. These systems appear as promising candidates for the elaboration of red...

Low-energy collisions of atomic ions and cluster ions with rare gas covered metal substrates can lead to strong light emission which is element and size specific. Instead of a direct energy transfer into the electronic system of the cluster the observed emission originates from excitons trapped in the rare gas layer which carries the excitation energy. The nature of the processes involved in th...

Experimental evidence is presented that shows that the conical emission often found surrounding a near-resonant laser beam after it passes through an atomic vapor is due to nondegenerate four-wave mixing enhanced by the ac Stark effect. We demonstrate self-trapping of a pulsed dye-laser beam in sodium vapor for wavelengths 0.04 to 10 A shorter than that of the D(2) resonance and show that the f...

This article describes the concept of controlling and correcting interference resulting from flame instability and sample reduction in absorption atomic spectrometry with flame atomization. Using popular laboratory spectrometers, which enable simultaneous or fast sequential measurements of many elements in the course of a single analysis, methods of controlling and correcting problems with inst...

We study plasma effects on radiative transitions (e.g., decay of excited states of atoms or atomic nuclei) in a dense plasma at the transition frequencies ! & !p (where !p is the electron plasma frequency). The decay goes through four channels—the emission of real transverse and longitudinal plasmons as well as the emission of virtual transverse and longitudinal plasmons with subsequent absorpt...

As these approaches are confined to representing event structural properties, the idiosyncratic lexical content is often reduced to an unanalyzed atomic root. In our talk we will demonstrate by the example of verbs of emission that a more fine-grained analysis is necessary in order to account for the semantics of these verbs. Following the traditional approach in Rappaport Hovav and Levin (2010...

We report on the observation of fast hydrogen atoms in a capacitively coupled RF reactor by optical emission spectroscopy. For the analysis we use the prominent H emission line of atomic hydrogen in combination with other lines from molecular hydrogen and argon. Several characteristic emission structures can be identified. One of these structures is related to fast hydrogen atoms traveling from...

An experimental way of testing Bose-Einstein condensation of alpha clusters in the atomic nucleus is reported. The enhancement of cluster emission and the multiplicity partition of possible emitted clusters could be direct signatures for the condensed states. The barrier for the emission of clusters, such as (8)Be and (12)C(O(+)(2)), is calculated and compared with the barrier for the sequentia...