Results 171 to 180 of about 996 (203)

3D-reconstruction of an object by means of a confocal micro-PIXE

J. Anal. At. Spectrom., 2010
We recorded a series of spectral maps of a hematite particle by combining a scanning proton microbeam excitation with detection of X-rays by a Si(Li) spectrometer equipped with polycapillary lens. The particle was driven through the sensitive microvolume to allow for a reconstruction of concentration in three dimensions.
Matjaž Žitnik, Nataša Grlj, Primož Vaupetič, Primož Pelicon, Klemen Bučar, Dimosthenis Sokaras, Andreas Germanos Karydas, Birgit Kanngießer   +7 more
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Two-pyroxene geothermometer by using micro-PIXE data

Journal of Radioanalytical and Nuclear Chemistry, 2006
Rock-forming pyroxene phenocrystals from two andesite localities regarded as remnants of ancient lava flows in the southeastern part of the Tokaj Mountains near Sarospatak town (NE Hungary) were analyzed by micro-PIXE technique. The major element composition data of coexisting clino-and orthopyroxene phenocrystal pairs make it possible to estimate the ...
Á. Csámer, Z. Elekes, P. Rózsa, I. Uzonyi   +3 more
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Micro-PIXE in plant sciences: Present status and perspectives

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2002
Fundamental processes of plant physiology are affected or regulated by mineral nutrients. Hence understanding the mechanisms of nutrient uptake and their functions in plant metabolism is of fundamental importance in both basic and applied plant studies.
Jolanta Mesjasz-Przybyłowicz, Wojciech J. Przybyłowicz   +1 more
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Micro-PIXE analysis of impurities in bow-tie trees

[Proceedings] 1992 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena, 2003
The impurity distributions in the core, wings, and the XLPE (cross-linked polyethylene) insulation surrounding six bow-tie trees found in a 25-kV underground cable were analyzed by scanning micro-PIXE (proton induced X-ray emission) using a focused 0.75-MeV proton beam.
A. Houdayer, P.F. Hinrichsen, W.J. Teesdale, J.-L. Parpal, J.-P. Crine   +4 more
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Characterization of Dyrrhachium silver coins by micro-PIXE method

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2000
Abstract Ancient silver coins (drachms) issued by the Greek city Dyrrhachium during 68–43 years BC were analysed non-destructively by micro-PIXE method. The selected 27 drachms, including four imitations, belong to the numismatic collection of the Hungarian National Museum (HNM).
I Uzonyi, R Bugoi, A Sasianu, Á.Z Kiss, B Constantinescu, M Torbágyi   +5 more
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Micro-PIXE studies of char populations in northern Canada

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1999
Abstract Micro-PIXE analysis of trace elements in otoliths has been used as the basis for several projects on char, a fish that is important for aboriginal subsistence fisheries in Arctic Canada. Life-history patterns were originally inferred from micro-PIXE line scans of Sr distribution.
J.L Campbell, J.A Babaluk, N.M Halden, A.H Kristofferson, J.A Maxwell, S.R Mejia, J.D Reist, W.J Teesdale   +7 more
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Micro-PIXE measurements in meteorites as a source of new information

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1991
Abstract Most of the present information on the early solar system comes from the investigation of meteorites. Trace-element contents are so far known from bulk analyses, and lateral distributions are known from electron microprobe investigations of the major and minor elements.
S. Bajt, K. Traxel
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Preliminary studies on applications of micro-PIXE to atmospheric aerosols

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2001
Abstract To characterize the physical and chemical properties of the individual aerosol particles during Asian dust storm in Japan, micro-PIXE technique was applied in this study. Aerosol particles were sampled in Kyoto, Japan from the middle of March to the end of April 1999. Mass concentration in Asian dust storm events was roughly 3–5 times higher
M Kasahara, C.-J Ma, T Kamiya, T Sakai
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The influence of sample roughness on the quantification of micro-PIXE results

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1990
Abstract The intensity distribution of thick target PIXE yields emerging from several model surfaces is computed as a function of photon energy and sample composition. It is found that one thin concave dip on a perfectly homogeneous glass sample can cause changes in intensity distribution of low energy characteristic X-ray lines of 100% or more ...
I. Orlić, F. Van Langevelde, R.D. Vis
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The nuclear microprobe—advances in micro PIXE and complementary techniques

X-Ray Spectrometry, 1995
Abstract The nuclear microprobe is an analytical instrument using ion beams produced in accelerators, which generate charged particles with energies of MeV as compared with keV for the electrons used in electron microscopes. The dependence on such an accelerator obviously limits the direct use of the nuclear microprobe in most ...
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