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11.
A new type of radiofrequency capacitively coupled plasma torch is presented. The torch electrode geometry is coaxial with a tubular central electrode and one or two outer ring electrodes. The argon plasma is generated at 275 W radiofrequency power and 27.12 MHz and it has a very good stability and a low gas consumption of 0.4 l min(-1). The nebulized sample is introduced through the tubular electrode into the core of the annular shaped plasma thus achieving a better atomisation and a lower background. The limits of detection for 20 elements are in the range of ng ml(-1) and the dynamic range between 2.5 and 3.5. The best results are obtained with the torch with two outer ring electrodes. 相似文献
12.
A. Pichler S. Bartalucci S. Bertolucci C. Berucci M. Bragadireanu M. Cargnelli A. Clozza C. Curceanu L. De Paolis S. Di Matteo A. D’Uffizi J.-P. Egger C. Guaraldo M. Iliescu T. Ishiwatari M. Laubenstein J. Marton E. Milotti D. Pietreanu K. Piscicchia T. Ponta E. Sbardella A. Scordo H. Shi D. Sirghi F. Sirghi L. Sperandio O. Vazquez-Doce E. Widmann J. Zmeskal 《Hyperfine Interactions》2015,233(1-3):121-126
13.
M. Anikina V. Aksinenko E. Dementiev M. Gaździcki N. Glagoleva A. Golokhvastov L. Goncharova A. Grachov K. Iovchev S. Kadykova N. Kaminsky S. Khorozov E. Kuznetsova J. Lukstins A. Matyushin V. Matyushin E. Okonov T. Ostanevich E. Shevchenko S. Sidorin G. Vardenga O. Balea N. Nikorovich T. Ponta L. Chkhaidze T. Dzobava M. Destpotashvili I. Tuliani E. Khusainov N. Nurgozin B. Suleimanov E. Skrzypczak T. Tymieniecka 《Zeitschrift fur Physik C Particles and Fields》1984,25(1):1-11
Data on Λ's andK 0's, produced in central nucleus-nucleus collisions (C?C, C?Ne, O?Ne, C?Cu, C?Zr, C?Pb, O?Pb) at a 4.5 GeV/c momentum per incident nucleon obtained in the streamer chamber spectrometer SKM-200, are presented. Multiplicities, transverse momenta, rapidities and other characteristics are considered and compared with those for inelastic He?Li interactions. The polarization of Λ's was found to be consistent with zero. The upper limit of \(\bar \Lambda /\Lambda \) production ratio was estimated to be ≤10?2 with a 90% confidence level. The results are compared with data of other experiments and some model calculations. 相似文献
14.
E. Balea O. Balea V. Boldea S. Felea D. Pantea T. Ponta C. Besliu F. Cotorobai N. Nicorovici 《Physics letters. [Part B]》1973,46(3):389-391
The scaling properties of the semi-inclusive reactions π?p → π?+(n?1) charged + neutrals at 7.5 and 21 GeV/c are analysed. The distributions of the h-functions on the x-variable for π? particles indicate the presence of a limited scaling. The choosing of a certain value for the reduced charged multiplicity is pointed out. 相似文献
15.
The energy functional for the Skyrme density-dependent force is used to calculate the interaction potential between two 16O nuclei. A two-centre harmonic oscillator potential is employed to construct the density and kinetic energy density of the ground state of the combined system and of the separated nuclei. The antisymmetrization effects are investigated. The relative motion of the nuclei is taken approximately into account and the energy dependence of the potential derived from the Skyrme force is presented. 相似文献
16.
Tiberiu Freniu Ana-Maria Rusu Michaela Ponta Sorin D. Anghel E. A. Cordos 《Fresenius' Journal of Analytical Chemistry》1996,355(3-4):254-255
A low to medium power radiofrequency capacitively coupled plasma is characterized as spectral source for atomic emission. The signal to background ratio and the limits of detection were determined for 19 elements as a function of the plasma torch geometry and the observation point. 相似文献
17.
O. Balea V. Boldea S. Felea T. Ponta L. Jenik D. Kiss S. Krasznovzky G. Pinter M. Posch L. Anioa̵ J. Bartke K. Eskreys S. Kowalczyk A. Kwiatkowska W. Zieliński A. Abdurakhimov N. Angelov V. Belyakov W. Wójcik 《Nuclear Physics B》1973,52(2):414-421
Data on the multiplicity of charged particles and π0 mesons in π?p and π?n interactions are presented and compared to various models. The average π0 multiplicity tends to increase with increasing number of charged particles. 相似文献
18.
Ponta O. Mocuta H. Vasilescu M. Simon S. 《Journal of Sol-Gel Science and Technology》2011,58(2):530-534
Bismuth silicate xBi2O3·(1 − x)SiO2 xerogels, 0 ≤ x ≤ 0.5, doped with gadolinium have been synthesized by sol–gel method. The study aims to evidence by X-ray
diffraction (XRD), electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR) the structural changes in amorphous
Bi2O3–SiO2 xerogels, function of Bi2O3 content and heat treatment. As was proved by XRD, nanostructured samples were obtained after 30 min heat treatment at 400 °C
of the as-prepared samples with x > 0, in the mainly amorphous matrices nanocrystals of Bi5.6Si0.5O9.4 phase being developed. The dimension of the nanocrystallites are function of the bismuth content, and vary from few nanometers
to 25 nm for samples with x = 0.14 and x = 0.5 respectively. The local order around silicon, reflected by 29Si MAS NMR spectra,
is less dependent on both composition and thermal history of the samples, showing that an amorphous silicon rich phase is
present in all samples. The changes in the local order around Gd3+ ions, as reflected by the EPR spectra dependence on composition and especially on the heat treatment, support the assumption
that a part of these paramagnetic ions is incorporated in the bismuth rich phase. 相似文献
19.
M. Iliescu M. Bazzi G. Beer L. Bombelli A. M. Bragadireanu M. Cargnelli C. Curceanu A. d’Uffizi C. Fiorini T. Frizzi F. Ghio C. Guaraldo R. S. Hayano T. Ishiwatari M. Iwasaki P. Kienle P. Levi Sandri A. Longoni J. Marton S. Okada D. Pietreanu T. Ponta A. Rizzo A. Romero Vidal E. Sbardella A. Scordo H. Shi D. L. Sirghi F. Sirghi H. Tatsuno A. Tudorache V. Tudorache O. Vazquez Doce E. Widmann B. Wünschek J. Zmeskal 《Few-Body Systems》2013,54(7-10):1123-1126
20.
Michael Cargnelli M. Bazzi G. Beer C. Berucci L. Bombelli A. M. Bragadireanu A. Clozza G. Corradi C. Curceanu A. d’Uffizi C. Fiorini F. Ghio B. Girolami C. Guaraldo R. S. Hayano M. Iliescu T. Ishiwatari M. Iwasaki P. Kienle P. Levi Sandri V. Lucherini J. Marton S. Okada D. Pietreanu K. Piscicchia M. Poli Lener T. Ponta R. Quaglia A. Rizzo A. Romero Vidal E. Sbardella A. Scordo H. Shi D. L. Sirghi F. Sirghi H. Tatsuno A. Tudorache V. Tudorache O. Vazquez Doce E. Widmann J. Zmeskal 《Hyperfine Interactions》2012,209(1-3):121-126
The $\overline{K}N$ system at rest plays a key role for the understanding of strong interaction of hadrons with strangeness involved. The experiment SIDDHARTA used X-ray spectroscopy of kaonic atoms to measure the strong interaction induced shift and width of the ground state. It was the first experiment on kaonic He3 and deuterium ever, kaonic hydrogen was measured with improved precision resulting in $\epsilon_{1s} = -283 \pm 36 \mbox{(stat)} \pm 6 \mbox{(syst)}$ eV and $\Gamma_{1s} = 541 \pm 89 \mbox{(stat)} \pm 22 \mbox{(syst)}$ eV. Additionally a scheme for an improved future experiment on kaonic deuterium is introduced in this contribution. 相似文献