electron microprobe


Also found in: Acronyms, Wikipedia.

electron microprobe

[i′lek‚trän ′mī·krō‚prōb]
(physics)
An x-ray machine in which electrons emitted from a hot-filament source are accelerated electrostatically, then focused to an extremely small point on the surface of a specimen by an electromagnetic lens; nondestructive analysis of the specimen can then be made by measuring the backscattered electrons, the specimen current, the resulting x-radiation, or any other resulting phenomenon. Also known as electron probe.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The composition of the calcite inner exocuticle and endocuticle layers were studied in greater detail using 12 quantitative transects of lobster intermolt cuticle using the SX-50 electron microprobe. Care was taken to include transects through trabecular as well as nontrabecular regions of the cuticle, which changed the chemical profiles mainly in the inner exocuticle, which the trabeculae populate.
The X-ray diffraction analyses combined with the evaluation of chemical compositions by means of the electron microprobe of muds taken from the floor of Philippine, Solomon and Coral Seas prove that their main mineral components are mostly represented by sheet silicates (smectite, discovered by the ethylene glycol treatment, chlorite, mica) reflecting volcanic influences (see also Aoki et al., 2002).
The electron microprobe analyses (Table 1) of the volcanic glass shards reveal that the ash is a highly silicic, moderately potassic rhyolite.
Brown (2000), using a similar electron microprobe (Cameca SX-50), demonstrated similar patterns of strontium distribution for Yukon River anadromous inconnu.
Comparison of accuracy, precision, and sensitivity in elemental assays of fish otoliths using the electron microprobe, proton-induced x-ray emission, and laser ablation inductively coupled plasma mass spectrometry.
DuPont de Nemours Experimental Station in Wilmington, DE where he became involved in x-ray fluorescence (XRF) but soon developed an interest in Electron Probe Microanalysis (EPMA) when DuPont purchased one of the first commercial Applied Research Laboratories (ARL) scanning electron microprobes.
Electron microprobe analysis (EMPA) is a non-destructive surface analysis technique.
These include X-ray diffraction, transmitted light microscopy, reflected light microscopy, scanning electron microscopy, transmission electron microscopy, and electron microprobe. Non-traditional techniques, including Auger electron spectroscopy, X-ray photoelectron spectroscopy, Mossbauer spectroscopy, and cathodoluminescence microscopy, are also beneficial in determining mineralogical interactions of processed materials.
Prior to the development of wavelength-dispersed spectroscopy on an electron microprobe analyzer and energy-dispersed spectroscopy on a scanning electron microscope, selective etching experiments were conducted as an aid to intermetallic phase identification.
Firstly, grains were counted with a JEOL 733 electron microprobe in energy-dispersive mode by an automated point counting technique (Chittleborough 1989).
The distribution of some elements in the shell of freshwater and marine bivalves by electron microprobe analysis.
Three types of equipment--an electron microprobe, X-ray synchrotron, and ion microprobe--were used to study the rock from the Bishop area.

Full browser ?