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Letteratura scientifica selezionata sul tema "Photon spectrometry"

Autore: Grafiati

Pubblicato: 14 dicembre 2024

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Articoli di riviste sul tema "Photon spectrometry"

1

Behrens, Rolf, Hayo Zutz, and Julian Busse. "Spectrometry of pulsed photon radiation." Journal of Radiological Protection 42, no. 1 (2022): 011507. http://dx.doi.org/10.1088/1361-6498/ac3dd0.

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Abstract The energy distribution (spectrum) of pulsed photon radiation can hardly be measured using active devices, therefore, a thermoluminescence detector (TLD)-based few-channel spectrometer is used in combination with a Bayesian data analysis to help resolve this problem. The spectrometer consists of 30 TLD layers interspaced by absorbers made of plastics and metals with increasing atomic numbers and thickness. Thus, the main idea behind the device is the deeper the radiation penetrates—the higher the radiation’s energy when the radiation impinges perpendicular to the front of the spectrom

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2

Lockyer, Nicholas P., and John C. Vickerman. "Single Photon Ionisation Mass Spectrometry Using Laser-Generated Vacuum Ultraviolet Photons." Laser Chemistry 17, no. 3 (1997): 139–59. http://dx.doi.org/10.1155/1997/53174.

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This paper provides an overview of the method of single photon ionisation mass spectrometry. A review of the theory of frequency upconversion using third-order 4- wave sum mixing in isotropic media and experimental results of third harmonic generation (THG) using a frequency tripled 355 nm Nd:YAG pump source are presented. Vacuum Ultra-violet (VUV) photons of wavelength 118 nm are detected in an acetone ionisation chamber. The emphasis of this paper is on the practical aspects of generating and detecting the VUV photons and using them for single photon ionisation (SPI) in the ion source of a m

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3

Fairbank, W. M. "Photon burst mass spectrometry." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 29, no. 1-2 (1987): 407–14. http://dx.doi.org/10.1016/0168-583x(87)90274-6.

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4

Besnard-Vauterin, C., V. Blideanu, and B. Rapp. "Development of a new method for the detection of illicit materials based on the Active Photon Interrogation Method and photo-neutron spectrometry." EPJ Web of Conferences 288 (2023): 06004. http://dx.doi.org/10.1051/epjconf/202328806004.

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The detection of illicit materials is a critical task in the field of homeland security, as international trade has contributed to the increase of smuggling activities. Nonintrusive on-site inspections are crucial in this context, but the current active interrogation methods have limitations. Neutron-induced reactions have been used, but the measurement of gamma spectra is complex due to background noise. Active photon interrogation methods have also been overlooked but they are currently limited to actinides detection using photo-fission reactions. This work presents a novel method for the de

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5

Klein, H. "Photon spectrometry in mixed fields." Radiation Protection Dosimetry 107, no. 1-3 (2003): 125–31. http://dx.doi.org/10.1093/oxfordjournals.rpd.a006381.

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6

Omori, Yasutaka, Atsuyuki Sorimachi, Masahiro Hosoda, et al. "Improvement of spectral analysis using a NaI(Tl) scintillation spectrometer to evaluate ambient gamma dose rates from primordial radionuclides." Radiation Protection Dosimetry 199, no. 18 (2023): 2233–37. http://dx.doi.org/10.1093/rpd/ncad258.

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Abstract In-situ measurements by gamma-ray spectrometry using a NaI(Tl) scintillation spectrometer are performed to discriminate primordial and artificial radionuclides contributing to ambient gamma dose rates in the living environment to quantify prolonged influence of nuclear accidents. However, low energy resolution of the spectrometer causes poor discrimination in the measurements at high-dose-rate points, which leads to overestimation of ambient gamma dose rate from the primordial radionuclides. The present study clarified that photon fluxes originating from 40K and 214Bi were affected by

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7

Šolc, J., P. Dryák, J. Rusňák, V. Sochor, and Z. Vykydal. "Practical X-ray beam spectrometry with cadmium telluride detector in 10–300 kVp range at Czech Metrology Institute. Part II. Unfolding." Journal of Instrumentation 17, no. 10 (2022): P10003. http://dx.doi.org/10.1088/1748-0221/17/10/p10003.

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Abstract The paper summarizes computational methods and software tools used at Czech Metrology Institute for unfolding of X-ray photon fluence spectra from detector spectra measured with a cadmium telluride (CdTe) spectrometer directly in the X-ray beam. Fluence spectra were determined using multi-channel unfolding software GRAVEL. Response functions were calculated by Monte Carlo (MC) method using the general-purpose code MCNP® in version 6.2 with EPRDATA14 photon cross-section tables. The detailed MC model of the CdTe spectrometer was developed and it was validated by comparison with full-en

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8

Lamprou, Theocharis, Rodrigo Lopez-Martens, Stefan Haessler, et al. "Quantum-Optical Spectrometry in Relativistic Laser–Plasma Interactions Using the High-Harmonic Generation Process: A Proposal." Photonics 8, no. 6 (2021): 192. http://dx.doi.org/10.3390/photonics8060192.

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Quantum-optical spectrometry is a recently developed shot-to-shot photon correlation-based method, namely using a quantum spectrometer (QS), that has been used to reveal the quantum optical nature of intense laser–matter interactions and connect the research domains of quantum optics (QO) and strong laser-field physics (SLFP). The method provides the probability of absorbing photons from a driving laser field towards the generation of a strong laser–field interaction product, such as high-order harmonics. In this case, the harmonic spectrum is reflected in the photon number distribution of the

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9

Kudo, K., N. Takeda, S. Koshikawa, H. Toyokawa, H. Ohgaki, and M. Matzke. "Photon spectrometry in thermal neutron standard field." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 476, no. 1-2 (2002): 213–17. http://dx.doi.org/10.1016/s0168-9002(01)01434-6.

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Aleksandrov, D., J. Alme, V. Basmanov, et al. "Solving a Deconvolution Problem in Photon Spectrometry." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 620, no. 2-3 (2010): 526–33. http://dx.doi.org/10.1016/j.nima.2010.03.148.

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Tesi sul tema "Photon spectrometry"

1

Finch, Jeffrey William. "Selective mass spectrometry by single-photon ionization from a molecular hydrogen laser source." Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/185895.

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A molecular hydrogen laser, with an output of 7.8 eV photons in the vacuum ultraviolet, is evaluated as a selective source for photoionization mass spectrometry. Types of compounds ionized by the laser include a variety of amines, nitrogen heterocycles, drugs of abuse, pharmaceuticals, and polynuclear aromatic hydrocarbons (PAHS). The laser is coupled to a time-of-flight mass analyzer, which allows a spectrum to be recorded with each laser pulse. The laser is a "soft" ionization source and mass spectra of nearly all of the compounds studied yield single ion peaks due to the parent molecule wit

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2

Chen, Yanfeng. "Analysis of Biological Molecules Using Stimulated Desorption Photoionization Mass Spectrometry." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14620.

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Surface-assisted laser desorption/ionization mass spectrometry (SALDI MS) is a novel technique for direct analysis of organic and biological molecules. Amino acids, dipeptides, and organoselenium compounds were successfully detected by SALDI on carbon and silicon surfaces. Surface effects, solvent effects, temperature effects and pH effects were studied. A possible mechanism of SALDI is proposed based on observed results. In general, stimulated desorption results in neutral yields that are much larger than ion yields. Thus, we have exploited and further developed laser desorption single

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Burns, Kimberly Ann. "Coupled multi-group neutron photon transport for the simulation of high-resolution gamma-ray spectroscopy applications." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29737.

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Thesis (Ph.D)--Mechanical Engineering, Georgia Institute of Technology, 2010.<br>Committee Chair: Hertel, Nolan; Committee Member: Kulp, William David; Committee Member: Lee, Eva; Committee Member: Pagh, Richard; Committee Member: Petrovic, Bojan; Committee Member: Rahnema, Farzad; Committee Member: Smith, Eric; Committee Member: Wang, Chris. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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4

Knie, André [Verfasser]. "Photon induced inner-shell excitation processes of nitrous oxide probed by angle resolved fluorescence and Auger-Electron spectrometry / André Knie." Kassel : Kassel University Press, 2013. http://d-nb.info/1056946180/34.

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Ben, Ltaief Ltaief [Verfasser]. "Interatomic Coulombic decay in noble gas clusters of varying sizes investigated by photon-induced (dispersed) ﬂuorescence spectrometry / Ltaief Ben Ltaief". Kassel : Universitätsbibliothek Kassel, 2018. http://d-nb.info/1162155019/34.

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Habib, Amr. "Détecteurs radiologiques grande surface, multi-énergie." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT055.

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L'objectif de la thèse est de proposer une solution pour un circuit intégré matriciel pour l'imagerie de rayons X fonctionnant, soit en mode spectrométrique où l'énergie de chaque photon X est mesurée, soit en mode d'intégration de charges où l'énergie totale déposée par les rayons X pendant une image est mesurée, la solution devant être à terme compatible avec un détecteur de grande surface typiquement de 20 cm x 20 cm. Un circuit de test (ASIC), ‘Sphinx' de 20 x 20 pixels au pas de 200 µm x 200 µm, en technologie CMOS 0.13 µm a été conçu pour servir de preuve du concept proposé. L'architectu

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Varga, János [Verfasser], and Armin [Akademischer Betreuer] Reller. "Application of Thermal Analysis: Single Photon Ionization Time-of-Flight Mass Spectrometry for Studies of Inorganic Clusters and Ionic Liquids / János Varga ; Betreuer: Armin Reller." Augsburg : Universität Augsburg, 2017. http://d-nb.info/114105390X/34.

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Nazih, Abdelhamid. "Applications de la spectroscopie par corrélation de photons à : 1) la granulométrie des imbrûlés : 2) la vélocimétrie." Rouen, 1989. http://www.theses.fr/1989ROUES030.

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Mesure de la distribution granulométrique de particules de suies dans un tunnel de dilution. Application d'une méthode vélocimétrique basée sur l'annulation de la fonction de corrélation de l'intensité à des temps finis. Bon accord des résultats expérimentaux et des prévisions théoriques

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Zahir, Mostafa Lokman. "Nouvelles références en énergie X et gamma inférieures à 100 keV établies à l'aide de calorimètres magnétiques ultra haute résolution." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP125.

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Les raies X et gamma émis par des radionucléides peuvent être utilisées pour étalonner l'échelle en énergie des détecteurs à dispersion d'énergie. C'est le cas notamment pour les détecteurs cryogéniques qui offrent une excellente résolution, mais présentent des non-linéarités qu'il faut corriger. Afin d'étalonner ces détecteurs avec précision en dessous de 200 keV, il est nécessaire de disposer de rayons X et gamma ayant une incertitude de l'ordre de 0,1 eV. Or, les énergies des photons gamma recommandées respectant ce critère sont rares ou basées sur une seule mesure expérimentale. L'objectif

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10

Adam, Thomas [Verfasser], Ralf [Akademischer Betreuer] Zimmermann, Antonius [Akademischer Betreuer] Kettrup, and Harun [Akademischer Betreuer] Parlar. "Investigation of Tobacco Pyrolysis Gases and Puff-by-puff Resolved Cigarette Smoke by Single Photon Ionisation (SPI) – Time-of-flight Mass Spectrometry (TOFMS) / Thomas Adam. Gutachter: Antonius Kettrup ; Harun Parlar. Betreuer: Ralf Zimmermann." München : Universitätsbibliothek der TU München, 2006. http://d-nb.info/1058140760/34.

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Libri sul tema "Photon spectrometry"

1

J, Laureijs R., ed. PHT--the imaging photo-polarimeter. ESA Publications, 2003.

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2

United States. National Aeronautics and Space Administration., ed. A rare gas optics-free absolute photon flux and energy analyzer for solar and planetary observations: Final report. Dept. of Physics and Space Sciences Center, University of Southern California, 1994.

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United States. National Aeronautics and Space Administration., ed. A rare gas optics-free absolute photon flux and energy analyzer for solar and planetary observations: Final report. Dept. of Physics and Space Sciences Center, University of Southern California, 1994.

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United States. National Aeronautics and Space Administration., ed. A rare gas optics-free absolute photon flux and energy analyzer for solar and planetary observations: Final report. Dept. of Physics and Space Sciences Center, University of Southern California, 1994.

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5

United States. National Aeronautics and Space Administration., ed. A rare gas optics-free absolute photon flux and energy analyzer to provide absolute photoionization rates of inflowing interstellar neutrals: Final report. National Aeronautics and Space Administration, 1994.

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United States. National Aeronautics and Space Administration., ed. A rare gas optics-free absolute photon flux and energy analyzer to provide absolute photoionization rates of inflowing interstellar neutrals: Final report. National Aeronautics and Space Administration, 1994.

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7

Kroto, H. W. Molecular rotation spectra. Dover Publications, 2003.

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Kroto, H. W. Molecular rotation spectra. Dover, 1992.

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9

Sobelʹman, I. I. Atomic spectra and radiative transitions. 2nd ed. Springer, 1996.

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Sobelʹman, I. I. Atomic spectra and radiative transitions. 2nd ed. Springer-Verlag, 1992.

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Capitoli di libri sul tema "Photon spectrometry"

1

Goidenko, I., L. Labzowsky, A. Nefiodov, G. Plunien, G. Soff, and S. Zschocke. "Evaluation of the Two-Photon Self-Energy Correction for Hydrogenlike Ions." In Atomic Physics at Accelerators: Mass Spectrometry. Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-015-1270-1_40.

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2

Klusoň, J. "Monte Carlo Simulations of Photon Field Characteristics for In Situ Gamma Spectrometry Applications." In Advanced Monte Carlo for Radiation Physics, Particle Transport Simulation and Applications. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-18211-2_54.

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3

Dong, F., E. R. Bernstein, and J. J. Rocca. "Single-Photon Ionization Soft-X-Ray Laser Mass Spectrometry of Potential Hydrogen Storage Materials." In Springer Proceedings in Physics. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1186-0_39.

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4

Kleinknecht, Konrad, and Ulrich Uwer. "Symmetry Violations and Quark Flavour Physics." In Particle Physics Reference Library. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-38207-0_9.

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AbstractOne of the surprising facts in our present understanding of the development of the Universe is the complete absence of “primordial” antimatter from the Big Bang about 13.7 billion years ago. The detection of charged cosmic-ray particles by magnetic spectrometers borne by balloons, satellites, and the space shuttle has shown no evidence for such primordial (high-energy) antibaryons; nor has the search for gamma rays from antimatter–matter annihilation yielded any such observation. In the early phases of the expanding Universe, a hot (1032 K) and dense plasma of quarks, antiquarks, leptons, antileptons and photons coexisted in equilibrium. This plasma expanded and cooled down, and matter and antimatter could recombine and annihilate into photons. If all interactions were symmetric with respect to matter and antimatter, and if baryon and lepton numbers were conserved, then all particles would finally convert to photons, and the expansion of the Universe would shift the wavelength of these photons to the far infrared region.

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Beechert, Jacqueline, Hadar Lazar, and Albert Y. Shih. "Germanium Detectors for MeV Gamma-Ray Astrophysics with the Compton Spectrometer and Imager." In X-ray Photon Processing Detectors. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-35241-6_10.

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Mochnacki, S. W., S. Chew, W. Kunowski, et al. "The DDO Photon-Counting Spectrometer: A Well-Dressed Shectograph." In Instrumentation and Research Programmes for Small Telescopes. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-010-9433-7_95.

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Hnatiuk, H. J., K. A. McGreer, and J. N. Broughton. "An Integrated Optical Spectrometer for WDM." In Applications of Photonic Technology 2. Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-9250-8_61.

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Chen, Tianze, Xiaohui Li, Ke Wang, et al. "A Readout Electronic System for a 3D Position-Sensitive CdZnTe Gamma-Ray Spectrometer Based on the CPRE10-32 Readout ASIC." In X-ray Photon Processing Detectors. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-35241-6_8.

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Villemaire, André, Martin Chamberland, and Jean Giroux. "MIPAS: A Fourier Transform Spectrometer for Limb Sounding of the Atmosphere." In Applications of Photonic Technology. Springer US, 1995. http://dx.doi.org/10.1007/978-1-4757-9247-8_35.

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Gray, L., J. Harron, C. Hersom, J. Freemantle, P. Shepherd, and J. Miller. "Calibration of the CASI Airborne Imaging Spectrometer and Application to Generating Reflectance Imagery." In Applications of Photonic Technology 2. Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-9250-8_101.

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Atti di convegni sul tema "Photon spectrometry"

1

Besnard-Vauterin, C., B. Rapp, and V. Blideanu. "Advancements in Active Photon Interrogation through Photo-neutron Spectrometry: Unveiling Nitrogen Signatures for Illicit Materials Detection." In 2024 IEEE Nuclear Science Symposium (NSS), Medical Imaging Conference (MIC) and Room Temperature Semiconductor Detector Conference (RTSD). IEEE, 2024. http://dx.doi.org/10.1109/nss/mic/rtsd57108.2024.10656955.

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2

Tkaczyk, Tomasz S., Jiawei Lu, and Haimu Cao. "Imaging Snapshot Spectrometers enabled with 2-Photon Polymerization based Additive Manufacturing." In Imaging Systems and Applications. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/isa.2024.im1g.7.

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The work presents examples of two imaging spectrometers enabled with 2-Photon Polymerization 3D printing. The presented spectrometers are field integral devices and image reorganization is achieved with high density waveguide array (waveguide spectrometer) or multifaceted, multi-angle mirror array respectively (Image Mapping Spectrometer - IMS). Fabricated components allow void spaces between image points dedicated for spectral information. High precision and repeatability of the fabricated components simplifies system calibration, improved image quality allows and more compact systems impleme

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Yevseyev, Igor V. "Polarization photon echo spectroscopy." In High Performance Optical Spectrometry, edited by Maksymilian Pluta, Aleksandra Kopystynska, and Mariusz Szyjer. SPIE, 1993. http://dx.doi.org/10.1117/12.155678.

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Gadomska, Bozena, and Wojciech Gadomski. "Creation and detuning of the two-photon overtone state in crystals by biharmonic pumping." In High Performance Optical Spectrometry, edited by Maksymilian Pluta, Aleksandra Kopystynska, and Mariusz Szyjer. SPIE, 1993. http://dx.doi.org/10.1117/12.155683.

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Travis, J. C., T. B. Lucatorto, J. Wen, J. D. Fassett, and C. W. Clark. "Doppler-Free Resonance Ionization Mass Spectrometry of Beryllium." In Laser Applications to Chemical Analysis. Optica Publishing Group, 1987. http://dx.doi.org/10.1364/laca.1987.tub2.

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As originally conceived, resonance ionization mass spectrometry (RIMS) combined the elemental selectivity of resonance ionization (1) with the isotopic selectivity of mass spectrometry to improve the accuracy and sensitivity of conventional mass spectrometry (2). For many applications, especially quantitation by isotope dilution (3) , it is important that no isotopic selectivity accompany the resonance ionization process. This condition is easily met for all but a few elements of the periodic table (4), since the great majority of optical isotope shifts are small with respect to typical dye la

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Behrens, R., H. Zutz, and J. Busse. "D2.3 Spectrometry of Pulsed Photon Radiation." In SMSI 2021. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2021. http://dx.doi.org/10.5162/smsi2021/d2.3.

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Glodz, M., and M. Krainska-Miszczak. "Quantum beat method with two-photon absorption scheme in hyperfine-structure investigation of highly excited2D j states of alkali metal atoms." In High Performance Optical Spectrometry, edited by Maksymilian Pluta, Aleksandra Kopystynska, and Mariusz Szyjer. SPIE, 1993. http://dx.doi.org/10.1117/12.155648.

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Lubman, David M., Chung Hang Sin, and Ho Ming Pang. "Analytical Applications Of Supercritical Fluid/Supersonic Beam Laser Ionization Mass Spectrometry." In Laser Applications to Chemical Analysis. Optica Publishing Group, 1987. http://dx.doi.org/10.1364/laca.1987.tua4.

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Supercritical fluids of CO2 and N2O are used as a means of solubilizing nonvolatile polynuclear aromatic hydrocarbons and small thermally labile biologicals for expansion into supersonic beams for mass spectrometry. The resulting expansion into vacuum results in internally ultracold molecules with sharp spectral features for unique identification in UV-VIS absorption spectroscopy. In this work laser resonant two-photon ionization is used as a means of selectively producing ions for detection in mass spectrometry where the first photon excites the molecule to a real resonant state and the secon

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Vink, H. J. P., J. P. R. Day, J. B. C. Volatier, and M. D. Nijkerk. "Spectrometry: photon sorting at the speed of light." In SPIE Optical Systems Design, edited by Laurent Mazuray, Rolf Wartmann, and Andrew P. Wood. SPIE, 2015. http://dx.doi.org/10.1117/12.2191294.

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Sośnicki’, Filip, Michał Mikołajczyk, Ali Golestani, and Michał Karpiński. "Characterization of Energy-Time Entangled Photon Pairs by Time-Resolved Detection." In Laser Science. Optica Publishing Group, 2023. http://dx.doi.org/10.1364/ls.2023.lm5f.6.

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We experimentally realize two-photon temporal imaging and dispersive Fourier spectrometry within a single optical setup. We measure the joint temporal and spectral intensities for the characterization of energy-time entangled photon pair.

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Rapporti di organizzazioni sul tema "Photon spectrometry"

1

Fairbank, W. M. Jr. [Photon burst mass spectrometry technique.] Final report. Office of Scientific and Technical Information (OSTI), 1996. http://dx.doi.org/10.2172/212673.

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2

McDowell, W. J., and G. N. Case. Procedure for the determination of uranium on cellulose air-sampling filters by photon-electron-rejecting-alpha-liquid-scintillation spectrometry. Office of Scientific and Technical Information (OSTI), 1986. http://dx.doi.org/10.2172/5227746.

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3

Rimal, Dipak. Proton Form Factor Puzzle and the CEBAF Large Acceptance Spectrometer (CLAS) Two-Photon Exchange Experiment. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1346719.

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4

Frabetti, P., and et al. Expression of intention to continue the study of states containing heavy quarks using the wideband photon beam and the E687 multiparticle spectrometer. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/1156321.

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Butterweck, Gernot, Alberto Stabilini, Benno Bucher, et al. Aeroradiometric measurements in the framework of the swiss exercise ARM23. Paul Scherrer Institute, PSI, 2024. http://dx.doi.org/10.55402/psi:60054.

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Abstract (sommario):

The flights of the civil (ARM23c) and military (ARM23m) parts of the exercise were performedbetween June 19th and 23rd and between September 11th and September 15th,respectively. The measuring system RLL001 was employed for all measurements. As usual, during the civil exercise the environs of some of the Swiss nuclear power plants were screened, on behalf of the Swiss Nuclear Safety Inspectorate (ENSI). At the site of the nuclear power plant Gösgen (KKG) with its pressurized water reactor, the activation products of the primary coolant loop are kept in the well shielded reactor building, thus

Gli stili APA, Harvard, Vancouver, ISO e altri

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