“Systematic errors in 14-MeV neutron activation analysis for oxygen : part 1 : neutron and γ-ray attenuation effects”. Vandecasteele C, van Grieken R, Gijbels R, Speecke A, Analytica chimica acta 64, 187 (1973). http://doi.org/10.1016/S0003-2670(01)82436-3
Abstract: A detailed account is given of neutron and γ-ray attenuation effects in 14-MeV neutron activation analysis of oxygen. Appropriate neutron cross-section values have been determined in two different ways and compared with literature values. It appears that the attenuation process is best described in terms of nonelastic scattering cross-sections. It is also shown that the narrow beam total γ-ray attenuation coefficients at 6 MeV, given in the literature are suitable for correction purposes if 16N γ-rays are counted with a window of 4.56.5 MeV. Attention was paid to the contribution of β-rays when the 16N activity is counted in this energy interval with a NaI(Tl) detector.
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 4.513
Times cited: 11
DOI: 10.1016/S0003-2670(01)82436-3
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“Systematic errors in 14-MeV neutron activation analysis for oxygen : part 2 : a general standardization method for the determination of oxygen”. Vandecasteele C, van Grieken R, Gijbels R, Speecke A, Analytica chimica acta 65, 1 (1973). http://doi.org/10.1016/S0003-2670(01)80158-6
Abstract: A general standardization method is described for the determination of oxygen in solid samples via the 16O(n,p)16N reaction. Two systems of flux monitoring are considered: the sample versus standard comparator method and BF3 monitoring. The average flux in sample and standard, fast neutron shielding, fast neutron scattering, absorption of fast neutrons, absorption of 16N γ-rays and counting efficiency of sample and standard are considered. The influence of the target diameter on the obtained correction factors has also been studied. Total achievable accuracy is believed to be about 1%.
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 4.513
Times cited: 12
DOI: 10.1016/S0003-2670(01)80158-6
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“The anharmonic force field of thioformaldehyde, H2CS”. Martin JML, François JP, Gijbels R, Journal of molecular spectroscopy 168, 363 (1994)
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 1.482
Times cited: 18
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“The anharmonic-force field of thioformaldehyde, h2cs, by ab-initio methods”. Martin JML, Francois, Gijbels R, Journal of molecular spectroscopy 168, 363 (1994). http://doi.org/10.1006/jmsp.1994.1285
Abstract: The quartic force field of thioformaldehyde has been calculated ab initio using large basis sets and augmented coupled cluster methods. Calculated fundamentals are in excellent agreement with experiment, as is the most important Coriolis coupling constant. Computed values for the anharmonicity, rovibrational coupling, and centrifugal distortion constants of the four isotopomers (H2CS)-S-32, (H2CS)-S-34, (HDCS)-S-32, and (D2CS)-S-32 have been reported. Predictions have been made for all vibrational transitions from the ground state to excited states with at most two quanta for these isotopomers, both using second-order perturbation theory corrected for Darling-Dennison resonance and using vibrational SCF-CI calculations. For (D2CS)-S-32, perturbation theory performs quite well; for the other isotopomers, performance is poorer for states involving excitation of the out-of-plane bend and, for the (H2CS)-S-32 and (H2CS)-S-34 isotopomers, also for the antisymmetric bend that is in severe Coriolis resonance with it. A possible explanation has been suggested. (C) 1994 Academic Press, Inc.
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 1.482
Times cited: 18
DOI: 10.1006/jmsp.1994.1285
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“The chemical characterization of silver halide microcrystals”. Geuens I, Gijbels R, Jacob W, Verbeeck A, de Keyzer R, , 251 (1993)
Keywords: P3 Proceeding; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
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“The dawn of surface analysis that stands by the side users: ultra-thin film analysis by rf-GDOES”. Shimizu K, Habazaki H, Bender H, Gijbels R, Engineering materials 52, 97 (2004)
Keywords: A3 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
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“The determination of silicon in steel by 14-mev neutron activation analysis”. van Grieken R, Gijbels R, Speecke A, Hoste J, Analytica chimica acta 43, 199 (1968). http://doi.org/10.1016/S0003-2670(00)89208-9
Abstract: A fast (25 min) non-destructive determination of silicon in steel by 14-MeV neutron activation is described. The 1.78-MeV 28Al activity, induced by the reaction 28Si(n,p)28Al, is counted on a NaI(Tl) detector. An oxygen flux monitor is used to normalise to the same neutron flux. Two methods are described to correct for the 56Mn activity (2.58 h), induced into the iron matrix via 56Fe(n,p)56Mn. Nuclear interferences of phosphorus and aluminium have been examined. Special attention has been paid to stainless steels. A sensitivity of 0.02 to 0.05% of silicon is obtained. The precision is 2 to 3% for steels containing above 1% silicon, and 7% for 0.1% of silicon.
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 4.513
Times cited: 19
DOI: 10.1016/S0003-2670(00)89208-9
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“The exchange of fluorinated dyes between different types of silver halide microcrystals studied by time of flight secondary ion mass spectrometry (TOF-SIMS)”. Lenaerts J, Verlinden G, Gijbels R, Geuens I, Callant P, , 180 (2000)
Keywords: P1 Proceeding; Engineering sciences. Technology; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
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“The impact of quantum chemical methods on the interpretation of molecular spectra of carbon clusters (review article)”. Martin JML, François JP, Gijbels R, Journal of molecular structure 294, 21 (1993). http://doi.org/10.1016/0022-2860(93)80305-F
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 1.602
Times cited: 21
DOI: 10.1016/0022-2860(93)80305-F
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“The ion- and atom-induced secondary electron emission yield: numerical study for the effect of clean and dirty cathode surfaces”. Bogaerts A, Gijbels R, Plasma sources science and technology 11, 27 (2002). http://doi.org/10.1088/0963-0252/11/1/303
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 3.302
Times cited: 51
DOI: 10.1088/0963-0252/11/1/303
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“The many faces of TOF-SIMS for the characterization of solid (sub)surfaces”. Gijbels R, , 101 (2003)
Keywords: P3 Proceeding; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
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“The primary energy dependence of backscattered electron images up to 100 keV”. Geuens I, Nys B, Naudts J, Gijbels R, Jacob W, van Espen P, Scanning microscopy 5, 339 (1991)
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Chemometrics (Mitac 3)
Times cited: 3
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“The role of fast argon ions and atoms in the ionization of argon in a direct current glow discharge: a mathematical simulation”. Bogaerts A, Gijbels R, Journal of applied physics 78, 6427 (1995). http://doi.org/10.1063/1.360526
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 2.183
Times cited: 60
DOI: 10.1063/1.360526
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“The rotational partition function of the symmetric top and the effect of K doubling thereon”. Martin JML, François JP, Gijbels R, Chemical physics letters 187, 375 (1991)
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 1.897
Times cited: 6
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“The structure and energetics of B3N2, B2N3, and BN4: symmetry breaking effects in B3N2”. Martin JML, El-Yazal J, François JP, Gijbels R, Molecular physics 85, 527 (1995). http://doi.org/10.1080/00268979500101281
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 1.72
Times cited: 19
DOI: 10.1080/00268979500101281
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“The structure, energetics, and harmonic vibrations of B3N”. Slanina Z, Martin JML, François JP, Gijbels R, Chemical physics letters 201, 54 (1993). http://doi.org/10.1016/0009-2614(93)85033-K
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 1.897
Times cited: 20
DOI: 10.1016/0009-2614(93)85033-K
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“The structure, energetics, and harmonic vibrations of B3N and BN3”. Martin JML, Slanina Z, François JP, Gijbels R, Molecular physics 82, 155 (1994). http://doi.org/10.1080/00268979400100114
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 1.72
Times cited: 19
DOI: 10.1080/00268979400100114
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“The use of surface analysis techniques and isotope mass spectrometry for the study of water-rock interactions of interest in hot-dry rock technology”. Adriaens A, van Nevel L, Van 't dack L, de Bièvre P, Adams F, Gijbels R, , 2541 (1995)
Keywords: P3 Proceeding; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
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“Three-dimensional chemical characterization of complex silver halide microcrystals by scanning ion microprobe mass analysis”. Verlinden G, Janssens G, Gijbels R, van Espen P, Geuens I, Analytical chemistry 69, 3773 (1997). http://doi.org/10.1021/ac970010r
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Chemometrics (Mitac 3)
Impact Factor: 6.32
Times cited: 6
DOI: 10.1021/ac970010r
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“Three-dimensional density profiles of sputtered atoms and ions in a direct current glow discharge: experimental study and comparison with calculations”. Bogaerts A, Wagner E, Smith BW, Winefordner JD, Pollmann D, Harrison WW, Gijbels R, Spectrochimica acta: part B : atomic spectroscopy 52, 205 (1997)
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 3.241
Times cited: 46
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“Three-dimensional density profiles of the argon metastable atoms in a direct current glow discharge: experimental study and comparison with calculations”. Bogaerts A, Guenard RD, Smith BW, Winefordner JD, Harrison WW, Gijbels R, Spectrochimica acta: part B : atomic spectroscopy 52, 219 (1997)
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 3.241
Times cited: 36
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“Three-dimensional modeling of a direct current glow discharge in argon: is it better than one-dimensional modeling?”.Bogaerts A, Gijbels R, Fresenius' journal of analytical chemistry 359, 331 (1997). http://doi.org/10.1007/s002160050582
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Times cited: 9
DOI: 10.1007/s002160050582
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“TOF-SIMS analysis of carbocyanine dyes adsorbed on silver substrates”. Lenaerts J, Verlinden G, van Vaeck L, Gijbels R, Geuens I, , 115 (2000)
Keywords: P3 Proceeding; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
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“Trace element and micro-mineral composition of some selected anhydrite samples from the Saint Ghislain drill hole (Hainaut, Belgium)”. Vandelannoote R, Van 't dack L, Gijbels R, Bulletin van de Belgische Vereniging voor Geologie 95, 101 (1986)
Keywords: A3 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
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“Trace element geochemistry in thermal waters from Amélie-les-Bains (Eastern Pyrenees, France)”. Gijbels R, van Grieken R, Vandelannoote R, Blommaert W, Van 't dack L, , 123 (1980)
Keywords: P3 Proceeding; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Trace element geochemistry in thermal waters from Plombières and Bains (Vosges)”. Gijbels R, van Grieken R, Blommaert W, Vandelannoote R, Van 't dack L, , 396 (1980)
Keywords: P3 Proceeding; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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Gijbels R, van Grieken R (1985) Trace element geochemistry in thermal waters from the Eastern Pyrenees. S.l
Keywords: MA3 Book as author; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Trace element geochemistry of the system rock-thermal water –, suspended matter –, deposits in a granitic environment”. Pentcheva EN, Veldeman E, Van 't dack L, Gijbels R, , 1321 (1992)
Keywords: P3 Proceeding; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Times cited: 1
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“Trace-element geochemistry of thermal water percolating through a karstic environment in the region of Saint Ghislain (Belgium)”. Blommaert W, Vandelannoote R, Sadurski A, Van 't dack L, Gijbels R, Journal of volcanology and geothermal research 19, 331 (1983). http://doi.org/10.1016/0377-0273(83)90117-8
Abstract: Five geothermal waters from the Mons area (southern Belgium) have been studied: one natural hot spring at Stambruges, one stagnant warm water from the inclined tunnels at Baudour, and three thermal waters from the drillholes at St. Ghislain, Ghlin and Douvrain, originating from the carbonate/anhydrite-bearing Visean strata, at depths of ca. 2600, 1550 and 1300 m, respectively. Multielement chemical analysis of the filtered water and its suspended matter > 0.4 μm) was carried out by instrumental neutron activation. Temperature in depth, calculated using the silica (chalcedony) chemical geothermometer, ranged from 75 to 88°C, in good agreement with experimentally determined values. Na/K and Na/K/Ca geothermometers yieilded erratic results, as expected from the geological environment in the aquifer. From the analytical data it can be calculated that the thermal waters of St. Ghislain, Ghlin and Douvrain are not only saturated with respect to chalcedony, but also to anhydrite, calcite, fluorite, barite, strontianite, and possibly zinc silicate, iron (III) hydroxide or siderite, albite, microcline, gibbsite and kaolinite. They are oversaturated with respect to muscovite. Data are also presented for the other thermal waters, and a cold spring water (Claire Fontaine, Stambruges). The similar trace-element composition of the thermal waters can be explained by percolation of the water in the same distant recharge zone, from where it descends, becomes heated at depth and rises along collapse breccia, and locally (Baudour, Stambruges) along fissures. The uptake of higher amounts of Ca, Mg, Sr and sulfate in St. Ghislain and Ghlin, as compared to Douvrain and Baudour is correlated with the boundary between the non-dissolved and dissolved evaporitic zones. This boundary is situated between St. Ghislain and Douvrain, and is roughly parallel with the direction of the groundwater flow (WNW).
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
Impact Factor: 2.543
Times cited: 2
DOI: 10.1016/0377-0273(83)90117-8
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“Trace-elemental anomalies in surface water near a small lead-zinc mineralization at Menez-Albot (Brittany, France)”. Vandelannoote R, Blommaert W, Sadurski A, Van 'T Dack L, Gijbels R, Van Grieken R, Bosch B, Leleu M, Rochon J, Sarcia C, Sureau JF;, Journal of geochemical exploration 20, 33 (1984). http://doi.org/10.1016/0375-6742(84)90088-8
Abstract: Sensitive multi-element analysis techniques were applied to water samples collected in the vicinity of a small Zn-Pb-Cu sulfide mineralization in the region of Menez-Albot (Finistère, France). The variation of the trace-element content along a local stream shows the presence of the mineralization, mainly through a simultaneous positive anomaly in solution for a group of about 10 elements (e.g. Ni, Cu, Zn, As, Sb) which are connected with this type of mineralization. The anomaly decreases steeply due to the influx of swamp water rich in Fe, Mn and organic matter. The precipitation barrier is reflected in the stream sediment composition. Contamination from fertilizers was observed in some samples.
Keywords: A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 2.747
Times cited: 4
DOI: 10.1016/0375-6742(84)90088-8
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