Articles de revues : « Optimized spectroscopy »

1

Riddle, A., et M. Selker. « Impedance-optimized photo-acoustic spectroscopy ». Applied Physics B 85, n^o 2-3 (10 août 2006) : 329–36. http://dx.doi.org/10.1007/s00340-006-2364-1.

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Korte, D., H. Cabrera, J. Toro, P. Grima, C. Leal, A. Villabona et M. Franko. « Optimized frequency dependent photothermal beam deflection spectroscopy ». Laser Physics Letters 13, n^o 12 (4 novembre 2016) : 125701. http://dx.doi.org/10.1088/1612-2011/13/12/125701.

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von Clarmann, Thomas, et Georg Echle. « Selection of optimized microwindows for atmospheric spectroscopy ». Applied Optics 37, n^o 33 (20 novembre 1998) : 7661. http://dx.doi.org/10.1364/ao.37.007661.

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De Paëpe, G., N. Giraud, A. Lesage, P. Hodgkinson, A. Böckmann et L. Emsley. « Transverse Dephasing Optimized Solid-State NMR Spectroscopy ». Journal of the American Chemical Society 125, n^o 46 (novembre 2003) : 13938–39. http://dx.doi.org/10.1021/ja037213j.

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Rance, Mark, J. Patrick Loria et Arthur G. Palmer. « Sensitivity Improvement of Transverse Relaxation-Optimized Spectroscopy ». Journal of Magnetic Resonance 136, n^o 1 (janvier 1999) : 92–101. http://dx.doi.org/10.1006/jmre.1998.1626.

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Wetzel, David L. « Sensitive IR narrow band optimized microspectrometer ». Vibrational Spectroscopy 29, n^o 1-2 (juillet 2002) : 183–89. http://dx.doi.org/10.1016/s0924-2031(01)00206-5.

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Green, Leigh Ann. « Entangled photon pairs lead to optimized quantum spectroscopy ». Scilight 2022, n^o 9 (4 mars 2022) : 091110. http://dx.doi.org/10.1063/10.0009636.

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Ho, K. F., H. M. Ching, K. W. Cheng, C. D. Beling, S. Fung et K. P. Ng. « Optimized Coincidence Doppler Broadening Spectroscopy Using Deconvolution Algorithms ». Materials Science Forum 445-446 (janvier 2004) : 477–79. http://dx.doi.org/10.4028/www.scientific.net/msf.445-446.477.

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Scheidegger, Olivier, Kevin Wingeier, Dan Stefan, Danielle Graveron-Demilly, Dirk van Ormondt, Roland Wiest et Johannes Slotboom. « Optimized quantitative magnetic resonance spectroscopy for clinical routine ». Magnetic Resonance in Medicine 70, n^o 1 (20 août 2012) : 25–32. http://dx.doi.org/10.1002/mrm.24455.

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Zhu, Guang, Xiangming Kong, Xianzhong Yan et Konghong Sze. « Sensitivity Enhancement in Transverse Relaxation Optimized NMR Spectroscopy ». Angewandte Chemie International Edition 37, n^o 20 (2 novembre 1998) : 2859–61. http://dx.doi.org/10.1002/(sici)1521-3773(19981102)37:20<2859 ::aid-anie2859>3.0.co;2-4.

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Yusuf, Mubarika Sekarsari, Sutriyo S et Ratika Rahmasari. « Synthesis Processing Condition Optimization of Citrate Stabilized Superparamagnetic Iron Oxide Nanoparticles using Direct Co-Precipitation Method ». Biomedical and Pharmacology Journal 14, n^o 3 (30 septembre 2021) : 1533–42. http://dx.doi.org/10.13005/bpj/2255.

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Superparamagnetic iron oxide nanoparticles (SPION) are commonly prepared by co-precipitation, a convenient and high yield producing method. However, this method produces large particles and wide size distribution. Thus, this study aims to optimize and determine the processing condition during the direct co-precipitation synthesis of citrate stabilized SPION (SPION-C). Processing conditions were optimized to achieve the suitable hydrodynamic size and zeta potential; measured straight after preparation, at weeks 3, 10, and 30. Characterization of optimized SPION and SPION-C was done by Fourier transform infrared spectroscopy (FTIR), fluorescence spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM). The optimized processing condition (stirring speed of 9000 rpm, stabilizer concentration of 1.006 M, and a 90oC stabilizer adsorption temperature), resulted in suitable SPION-C with a hydrodynamic size of 25.58 ± 7 nm, and zeta potential value of -50.8 ± 3.9. Particles with an almost sphere morphology with below 20 nm size were shown by TEM. The XRD analysis presented magnetite phase with a 2.79 nm core size which indicated the formation of stabilized SPION. The maximum excitation and emission wavelength of SPION after stabilization were proved to be uninterrupted by fluorescence spectroscopy. Further FTIR results supported the successful conjugation of citrate onto SPION. Highly stable and crystalline SPION-C were successfully produced through an optimized processing condition using direct co-precipitation. The obtained SPION-C conveyed desired nanoparticle size with narrow size distribution and stability for 30 weeks of storage at 4oC.

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Jochum, J. K., L. Spitz, C. Franz, A. Wendl, J. C. Leiner, C. Pfleiderer et O. Soltwedel. « Optimized signal deduction procedure for the MIEZE spectroscopy technique ». Journal of Applied Crystallography 55, n^o 1 (1 février 2022) : 14–20. http://dx.doi.org/10.1107/s1600576721011936.

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A method is reported to determine the phase and amplitude of sinusoidally modulated event rates, binned into four bins per oscillation, based on data generated at the resonant neutron spin-echo spectrometer RESEDA at FRM-II. The presented algorithm relies on a reconstruction of the unknown parameters. It omits a calculation-intensive fitting procedure and avoids contrast reduction due to averaging effects. It allows the current data acquisition bottleneck at RESEDA to be relaxed by a factor of four and thus increases the potential time resolution of the detector by the same factor. The approach is explained in detail and compared with the established fitting procedures of time series having four and 16 time bins per oscillation. In addition the empirical estimates of the errors of the three methods are presented and compared with each other. The reconstruction is shown to be unbiased, asymptotic and efficient for estimating the phase. Reconstructing the contrast increases the error bars by roughly 10% as compared with fitting 16 time-binned oscillations. Finally, the paper gives heuristic, analytical equations to estimate the error for phase and contrast as a function of their initial values and counting statistics.

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Mozharov, Sergey, Alison Nordon, David Littlejohn et Brian Marquardt. « Automated Cosmic Spike Filter Optimized for Process Raman Spectroscopy ». Applied Spectroscopy 66, n^o 11 (novembre 2012) : 1326–33. http://dx.doi.org/10.1366/12-06660.

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Rehrauer, Owen G., Bharat R. Mankani, Gregery T. Buzzard, Bradley J. Lucier et Dor Ben-Amotz. « Fluorescence modeling for optimized-binary compressive detection Raman spectroscopy ». Optics Express 23, n^o 18 (3 septembre 2015) : 23935. http://dx.doi.org/10.1364/oe.23.023935.

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de Beer, Chris, Paul S. Barendse et Pragasen Pillay. « Fuel Cell Condition Monitoring Using Optimized Broadband Impedance Spectroscopy ». IEEE Transactions on Industrial Electronics 62, n^o 8 (août 2015) : 5306–16. http://dx.doi.org/10.1109/tie.2015.2418313.

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Ettabib, Mohamed A., Zhen Liu, Michalis N. Zervas et James S. Wilkinson. « Optimized design for grating-coupled waveguide-enhanced Raman spectroscopy ». Optics Express 28, n^o 25 (23 novembre 2020) : 37226. http://dx.doi.org/10.1364/oe.410602.

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Höhler, Reinhard, Vincent Labiausse et Sylvie Cohen-Addad. « High-resolution diffusing-wave spectroscopy using optimized heterodyne detection ». Journal of the Optical Society of America A 20, n^o 11 (1 novembre 2003) : 2179. http://dx.doi.org/10.1364/josaa.20.002179.

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Lukeš, Zbyněk, Jaroslav Láčík et Zbyněk Raida. « Optimized wideband horn antenna for millimeter-wave spectroscopy applications ». Journal of Molecular Spectroscopy 243, n^o 2 (juin 2007) : 227–33. http://dx.doi.org/10.1016/j.jms.2007.04.004.

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Manu, V. S., et Gianluigi Veglia. « Genetic algorithm optimized triply compensated pulses in NMR spectroscopy ». Journal of Magnetic Resonance 260 (novembre 2015) : 136–43. http://dx.doi.org/10.1016/j.jmr.2015.09.010.

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Leitz, M., R. P. Podgorsek, H. Franke et J. Woods. « Optimized leaky mode spectroscopy with a single planar film ». Applied Physics Letters 77, n^o 17 (23 octobre 2000) : 2674–76. http://dx.doi.org/10.1063/1.1319512.

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Webb, S., D. J. Collins et M. O. Leach. « Quantitative magnetic resonance spectroscopy by optimized numerical curve fitting ». NMR in Biomedicine 5, n^o 2 (mars 1992) : 87–94. http://dx.doi.org/10.1002/nbm.1940050207.

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Khelifa, Meriam, Denis Mounier et Nourdin Yaakoubi. « Design of High Performance Scroll Microcoils for Nuclear Magnetic Resonance Spectroscopy of Nanoliter and Subnanoliter Samples ». Sensors 21, n^o 1 (29 décembre 2020) : 170. http://dx.doi.org/10.3390/s21010170.

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The electromagnetic properties of scroll microcoils are investigated with finite element modelling (FEM) and the design of experiment (DOE) approach. The design of scroll microcoils was optimized for nuclear magnetic resonance (NMR) spectroscopy of nanoliter and subnanoliter sample volumes. The unusual proximity effect favours optimised scroll microcoils with a large number of turns rolled up in close proximity. Scroll microcoils have many advantages over microsolenoids: such as ease of fabrication and better B1-homogeneity for comparable intrinsic signal-to-noise ratio (SNR). Scroll coils are suitable for broadband multinuclei NMR spectroscopy of subnanoliter sample.

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Stalikas, Constantine D., George A. Pilidis et Miltiades I. Karayannis. « Determination of lead and cadmium in environmental samples optimized by simplex optimized atomic absorption methods ». Journal of Analytical Atomic Spectrometry 11, n^o 8 (1996) : 595. http://dx.doi.org/10.1039/ja9961100595.

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Karstang, Terje V., et Rolf Manne. « Optimized scaling ». Chemometrics and Intelligent Laboratory Systems 14, n^o 1-3 (avril 1992) : 165–73. http://dx.doi.org/10.1016/0169-7439(92)80101-9.

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KARABACAK ATAY, Çiğdem, et Mehmet ULUTÜRK. « Synthesis and Theoretical Calculations of Benzoic Acid-Based New Mono Azo Dye ». Süleyman Demirel Üniversitesi Fen Edebiyat Fakültesi Fen Dergisi 17, n^o 2 (25 novembre 2022) : 559–67. http://dx.doi.org/10.29233/sdufeffd.1181119.

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This study describes the synthesis, characterization and theoretical calculation of 3,5-dihydroxy-2-(naphthalen-2-yldiazenyl) benzoic acid. The synthesized compound was obtained through efficient synthetic route using 2-Naphthylamine and 3,5-dihydroxybenzoic acid as starting materials and characterized by various spectroscopic techniques such as Fouirer Transform Infrared Spectroscopy (FTIR), Proton Nuclear Magnetic Resonance Spectroscopy (1H-NMR), Carbon Nuclear Magnetic Resonance Spectroscopy (13C-NMR), Ultraviolet–visible spectroscopy (UV-Vis). All theoretical calculation was performed with Density Functional Theory (DFT). Optimized molecular structure, vibrational spectra, NMR chemical shift values, frontier molecular orbitals, bond lengths (Å), bond angles (°) and Molecular Electrostatic Potential (MEP) diagram of molecule were calculated using the 6-311G(d,p) basis set. It has been observed that the results obtained from the experimental and theoretical calculations support each other and were in harmony.

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Dutta, Biplab, et Jan Helbing. « Optimized interferometric setup for chiral and achiral ultrafast IR spectroscopy ». Optics Express 23, n^o 12 (12 juin 2015) : 16449. http://dx.doi.org/10.1364/oe.23.016449.

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ten Kate, H. H. J., R. A. Hartmann, C. M. E. Zeyen, B. ten Haken et L. J. M. van de Klundert. « Construction of optimized superconducting spin precession magnets for neutron spectroscopy ». IEEE Transactions on Magnetics 25, n^o 2 (mars 1989) : 1688–91. http://dx.doi.org/10.1109/20.92626.

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Goldman, Ellen R., et Douglas C. Youvan. « An Algorithmically Optimized Combinatorial Library Screened by Digital Imaging Spectroscopy ». Nature Biotechnology 10, n^o 12 (décembre 1992) : 1557–61. http://dx.doi.org/10.1038/nbt1292-1557.

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Mankoo, Parminder K., et Thomas Keyes. « POLIR : Polarizable, flexible, transferable water potential optimized for IR spectroscopy ». Journal of Chemical Physics 129, n^o 3 (21 juillet 2008) : 034504. http://dx.doi.org/10.1063/1.2948966.

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Feng, Yuan, Ilya Vinogradov et Nien-Hui Ge. « Optimized noise reduction scheme for heterodyne spectroscopy using array detectors ». Optics Express 27, n^o 15 (9 juillet 2019) : 20323. http://dx.doi.org/10.1364/oe.27.020323.

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Patimisco, Pietro, Angelo Sampaolo, Marilena Giglio, Stefano dello Russo, Verena Mackowiak, Hubert Rossmadl, Alex Cable, Frank K. Tittel et Vincenzo Spagnolo. « Tuning forks with optimized geometries for quartz-enhanced photoacoustic spectroscopy ». Optics Express 27, n^o 2 (16 janvier 2019) : 1401. http://dx.doi.org/10.1364/oe.27.001401.

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Robin, Michel, Marc-André Delsuc, Eric Guittet et Jean-Yves Lallemand. « Optimized acquisition and processing schemes in three-dimensional NMR spectroscopy ». Journal of Magnetic Resonance (1969) 92, n^o 3 (mai 1991) : 645–50. http://dx.doi.org/10.1016/0022-2364(91)90364-y.

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Nägele, Thomas, Uwe Klose et Wolfgang Grodd. « Numerically optimized RF-refocusing pulses in localized MR proton spectroscopy ». Magnetic Resonance Imaging 11, n^o 6 (janvier 1993) : 785–97. http://dx.doi.org/10.1016/0730-725x(93)90196-k.

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W�thrich, Kurt, et Gerhard Wider. « Transverse relaxation-optimized NMR spectroscopy with biomacromolecular structures in solution ». Magnetic Resonance in Chemistry 41, S1 (2003) : S80—S88. http://dx.doi.org/10.1002/mrc.1280.

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Loria, J. Patrick, Mark Rance et Arthur G. Palmer. « Transverse-Relaxation-Optimized (TROSY) Gradient-Enhanced Triple-Resonance NMR Spectroscopy ». Journal of Magnetic Resonance 141, n^o 1 (novembre 1999) : 180–84. http://dx.doi.org/10.1006/jmre.1999.1891.

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Klus, Jakub, Stephen M. Seddio, David B. Rohde et Petr Hlavenka. « An Optimized Deconvolution Algorithm for Energy-Dispersive X-ray Spectroscopy ». Microscopy and Microanalysis 29, Supplement_1 (22 juillet 2023) : 231–32. http://dx.doi.org/10.1093/micmic/ozad067.103.

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Moreno, Thierry. « Optimized IR synchrotron beamline design ». Journal of Synchrotron Radiation 22, n^o 5 (22 juillet 2015) : 1163–69. http://dx.doi.org/10.1107/s1600577515010978.

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Synchrotron infrared beamlines are powerful tools on which to perform spectroscopy on microscopic length scales but require working with large bending-magnet source apertures in order to provide intense photon beams to the experiments. Many infrared beamlines use a single toroidal-shaped mirror to focus the source emission which generates, for large apertures, beams with significant geometrical aberrations resulting from the shape of the source and the beamline optics. In this paper, an optical layout optimized for synchrotron infrared beamlines, that removes almost totally the geometrical aberrations of the source, is presented and analyzed. This layout is already operational on the IR beamline of the Brazilian synchrotron. An infrared beamline design based on a SOLEIL bending-magnet source is given as an example, which could be useful for future IR beamline improvements at this facility.

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Nazarewicz, Rafal R., Alfiya Bikineyeva et Sergey I. Dikalov. « Rapid and Specific Measurements of Superoxide Using Fluorescence Spectroscopy ». Journal of Biomolecular Screening 18, n^o 4 (27 novembre 2012) : 498–503. http://dx.doi.org/10.1177/1087057112468765.

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Superoxide plays a key role in many pathological processes; however, detection of superoxide by one of the most common methods using dihydroethidium (DHE) may be unspecific because of overlapping fluorescence of the superoxide-specific product, 2-OH-ethidium (2OH-E), and the unspecific oxidation product, ethidium. Here, we show a new optimized fluorescence spectroscopy protocol that allows rapid and specific detection of superoxide in cell-free systems and intact cells using DHE. We defined new optimized fluorescent settings to measure the superoxide-specific product and minimize the interference of unspecific DHE oxidation products. Using this protocol, we studied real-time superoxide production by xanthine oxidase– and menadione-treated cultured cells. Specificity of the plate reader–based superoxide measurements was confirmed by the inhibition of fluorescence with superoxide dismutase and high-performance liquid chromatography (HPLC) analysis. We show that limitations of the HPLC-based analysis can be overcome by the optimized fluorescence spectroscopy.

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Xi, Xiaobing, et Edward S. Yeung. « Optimization of Detectability in Laser-Based Polarimeters ». Applied Spectroscopy 43, n^o 8 (novembre 1989) : 1337–41. http://dx.doi.org/10.1366/0003702894204425.

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To optimize the performance of a laser-based polarimeter, a mathematical simulation was performed. High-modulation currents allow a corresponding increase in signal. However, the effect of ohmic heating puts an upper limit on the power input to the solenoid. With this constraint, one can systematically choose the wire diameter and the number of turns per unit length. An experimental verification of the optimized parameters provided performance approaching the shot-noise limit. By using higher modulation currents, one can operate at 1 kHz to achieve detectability in the microdegree range, without the complications of high-frequency (100 kHz) modulation.

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Diem, M., G. M. Roberts, O. Lee et A. Barlow. « Design and Performance of an Optimized Dispersive Infrared Dichrograph ». Applied Spectroscopy 42, n^o 1 (janvier 1988) : 20–27. http://dx.doi.org/10.1366/0003702884428428.

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The design of a spectrometer for the observation of infrared vibrational circular dichroism (VCD) is reported. This instrument utilizes f/4 aperture, a minimum of optical elements, and a new electronic data acquisition method to improve the sensitivity of previous dispersive units. The instrument described exhibits a level of sensitivity comparable to that of present Fourier transform (FT) VCD instruments, while avoiding some problems which still persist in FT-VCD.

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Bialkowski, Stephen E. « Optimized Spectroscopic Signal Estimates Using Integration and Matched Filters ». Applied Spectroscopy 42, n^o 5 (juillet 1988) : 807–11. http://dx.doi.org/10.1366/0003702884428950.

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This paper examines theories of signal processing as applied to peak magnitude estimation in absorption and emission spectroscopy. Signals obtained from Fourier transform, fixed wavelength, and scanning dispersive instruments are modeled in terms of the time required to obtain a spectrum. The differences between these techniques and the signal processing procedures that should be used for each technique are characterized for a Lorentzian spectral feature. Including the time required to scan over a range of optical frequencies results in optimal signal processing procedures that are different from those previously supposed. In particular, it is found that the optimal matched filter is less efficient than repetitive measurements at a single frequency. The theory developed for the Lorentzian line model is extended to include an arbitrary shaped peak.

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K. Venkataramaniah, M. Sainath, K.Vijay Sai, Dwarakarani Rao et Deepa Seetharaman. « Design and Development of a Mini-Orange Magnetic Spectrometer with Multichannel Facility for Conversion Electron Spectroscopy ». Journal of Nuclear Physics, Material Sciences, Radiation and Applications 8, n^o 1 (9 novembre 2020) : 25–31. http://dx.doi.org/10.15415/jnp.2020.81004.

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Background: Conventional magnetic spectrometers used for conversion electron detection are very cumbersome, require strong magnetic fields and the spectra have to be scanned point by point and have very low transmission. A magnetic filter using permanent magnets and an Si(Li) detector would facilitate multichannel analysis with high transmission. The mini-orange is a new type of spectrometer for conversion electrons combining a solid state Si(Li) detector with a filter of permanent magnets around a central absorber of lead.Purpose: An indigenously developed magnetic spectrometer if optimized properly would be of great use in conversion electron spectroscopy for both online and offline experiments. Methods: A Mini-Orange magnetic spectrometer made of small permanent magnets has been designed and developed indigenously and optimized for its best performance condition. The transmission curves for different energy regions are plotted using the conversion electron spectra from the standard gamma transitions from 153Gd, 169Yb and 131Ba decays. The optimized spectrometer facilitates multichannel acquisition of conversion electron spectra for precision electron spectroscopy. The system also can be used in in-beam experiments with minor modifications of the vacuum chamber.Results: The optimized spectrometer was used for precision electron spectroscopy. Experimental transmission curves are then obtained by plotting Transmission (T) against the corresponding electron energy for low energy, medium energy and a broad energy range. Out of the several experiments done the optimum settings for f and g, that resulted in this curve, is identified at f = 7.5 cm and g = 4.5 cm. Conclusions: The optimized spectrometer facilitates multichannel acquisition of conversion electron spectra for precision electron spectroscopy. The system also can be used in in-beam experiments with minor modifications of the vacuum chamber.

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Sun, M. Z., Y. Cao, B. T. Hu, Y. Zhang et X. R. Chen. « The numerical calculation of quantum field theory in hadron spectroscopy ». International Journal of Modern Physics E 23, n^o 06 (juin 2014) : 1460005. http://dx.doi.org/10.1142/s0218301314600052.

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In this paper, we introduced QFT++, a C++ toolkit for numerical calculation of quantum field theory. By comparing the result from QFT++ with the traditional calculation result of the Feynman amplitude [Formula: see text], the validity of QFT++ was demonstrated. Furthermore, the toolkit was optimized in a fixed convention, in which a significant improvement of performance was found. The optimized version will be used in the partial wave analysis (PWA) of hadron spectroscopy, where the computation speed is a crucial bottleneck in most cases.

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Zhang, Yi, Scott B. Ficarro, Shaojuan Li et Jarrod A. Marto. « Optimized orbitrap HCD for quantitative analysis of phosphopeptides ». Journal of the American Society for Mass Spectrometry 20, n^o 8 (août 2009) : 1425–34. http://dx.doi.org/10.1016/j.jasms.2009.03.019.

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He, Xiaoxuan, Edward J. Auerbach, Michael Garwood, Naoharu Kobayashi, Xiaoping Wu et Gregory J. Metzger. « Parallel transmit optimized 3D composite adiabatic spectral‐spatial pulse for spectroscopy ». Magnetic Resonance in Medicine 86, n^o 1 (26 janvier 2021) : 17–32. http://dx.doi.org/10.1002/mrm.28682.

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Cunha, Leonardo A., Diptarka Hait, Richard Kang, Yuezhi Mao et Martin Head-Gordon. « Relativistic Orbital-Optimized Density Functional Theory for Accurate Core-Level Spectroscopy ». Journal of Physical Chemistry Letters 13, n^o 15 (12 avril 2022) : 3438–49. http://dx.doi.org/10.1021/acs.jpclett.2c00578.

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Clausen, Casper, Gustav Skands, Christian Bertelsen et Winnie Svendsen. « Coplanar Electrode Layout Optimized for Increased Sensitivity for Electrical Impedance Spectroscopy ». Micromachines 6, n^o 1 (30 décembre 2014) : 110–20. http://dx.doi.org/10.3390/mi6010110.

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Ghita, Gabriel, Glenn Sjoden et James Baciak. « On Neutron Spectroscopy Using Gas Proportional Detectors Optimized by Transport Theory ». Nuclear Technology 168, n^o 3 (décembre 2009) : 620–28. http://dx.doi.org/10.13182/nt09-a9279.

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Brigadoi, Sabrina, Domenico Salvagnin, Matteo Fischetti et Robert J. Cooper. « Array Designer : automated optimized array design for functional near-infrared spectroscopy ». Neurophotonics 5, n^o 03 (13 septembre 2018) : 1. http://dx.doi.org/10.1117/1.nph.5.3.035010.

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Belkić, Karen, et Dževad Belkić. « Optimized spectral analysis in magnetic resonance spectroscopy for early tumor diagnostics ». Journal of Physics : Conference Series 565 (16 décembre 2014) : 012002. http://dx.doi.org/10.1088/1742-6596/565/1/012002.

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Articles de revues sur le sujet « Optimized spectroscopy »

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