Search results for "pole [approximation]"
showing 10 items of 522 documents
Étude des propriétés optiques et spectroscopiques de nanorods dopés au lanthanide pour des applications de nanosondes en champ proche
2022
Lanthanide-doped nanoparticles constitute a versatile family of photoluminescent local nanoprobes. In this work, we study the photoluminescence of Eu3+-doped NaYF4 nanorods characterized by highly polarized spectra. We develop a full theoretical model and paraxial approximation for nanorod dipole emission. We measure the photoluminescence of individual nanorods by fluorescence confocal microscopy and determine some of their intrinsic optical properties. We also determine the nature (electric or magnetic) and orientations of dipoles moments of the optical transitions used for nanoprobing in the visible range.In addition to the full theoretical model and the paraxial approximation, Fourier mi…
Tensorial development of the rovibronic Hamiltonian and transition moment operators for octahedral molecules
2001
Abstract We present a development of the Hamiltonian, dipole moment and polarizability operators of octahedral XY 6 molecules in a degenerate electronic state. These rovibronic operators are written with the aid of a tensorial formalism derived from the one already used in Dijon in the case of molecules in a non-degenerate electronic state. Electronic operators are defined from the group theory properties. Transition moment operators are introduced in order to consider rovibronic transitions. Spectrum simulations are made thanks to a new version of the HTDS sofware [J. Quant. Spectrosc. Radiat. Transfer 66 (2000) 16] used for the calculation of rovibrational spectra.
La nécropole monumentale Cerny de Passy (Yonne) : description d'ensemble et problèmes d'interprétation
1994
International audience; D'abord repérée d'avion, puis fouillée sur l'emprise d'une gravière, la nécropole néolithique de Passy couvre plus de 20 hectares. Elle se compose d'une trentaine de grands monuments allongés, orientés à l'Est, et construits de terre et de bois. Les défunts, déposés sur le dos dans de probable coffres, reposaient dans des fosses profondes creusées dans l'axe des monuments. Les dépôts funéraires, qui comprennent des objets anthropomorphes, permettent d'attribuer ces sépultures au groupe de Cerny. La diversité des architectures et les phases de réfection constatées suggèrent une certaine dure d'utilisation.En rupture avec les traditions antérieure, ces pratiques funéra…
Une nouvelle nécropole monumentale Cerny à Gron "Les Sablons" (Yonne)
1995
International audience
La nécropole monumentale d'Escolives-Sainte-Camille "La Pièce de l'Étang" (Yonne). Premiers résultats (fouilles 1997-1999)
2004
International audience; La fouille de ce site a été entreprise en collaboration avec l'Université d'Edimbourg (Pr. M. Midgley) dans le cadre d'un projet de recherche sur les origines et les mutations marquant l'éclosion du Néolithique moyen en Sud-Est du Bassin parisien : mieux caractériser les pratiques funéraires et leur évolution, progresser dans la compréhension de la structure sociale, mieux appréhender le modèle d'organisation territoriale.Le site de "La Pièce de l'Étang" à Escolives-Sainte-Camille (Yonne) a volontairement été choisi en amont de l'Yonne moyenne, dans une zone où l'occupation connue relève plutôt d'un Chasséen du Sud et non du Cerny. Repéré par des survols aériens de J…
Le régime jurisprudentiel des paris sportifs dans l'Union européenne
2010
International audience
Realization of Regional Operational Programme of the Opolskie Voivodeship 2014-2020. Assumption and Activities In the Opole Agglomeration in the Cont…
2019
Celem artykułu jest identyfikacja i ocena działań mających wpływ na rozwój aglomeracji opolskiej na gruncie koncepcji zrównoważonego rozwoju. Istotne jest zidentyfikowanie działań podejmowanych w zakresie prowadzonej polityki w ramach istniejącego obszaru funkcjonalnego oraz ich ocena w kontekście założeń zrównoważonego rozwoju. Aby zrealizować tak określony cel, analizę oparto na typach projektów finansowanych w ramach RPO WO 2014-2020 oraz zasięgu ich oddziaływania. W rozważaniach uwzględniono trzy główne aspekty rozwoju zrównoważonego: ekonomiczny, społeczny oraz środowiskowy. Ponadto starano się zidentyfikować korzyści płynące z prowadzonych przez Stowarzyszenie Aglomeracji Opolskiej dz…
Towards high-accuracy mass spectrometry of highly charged short-lived ions at ISOLTRAP
2006
Dedicated to H.-J. Kluge on the occasion of his 65th birthday anniversary - Jürgen Kluge Special Issue; Multiply charged ions of stable xenon isotopes from a plasma ion source have been mass-selected by the on-line mass separator ISOLDE/CERN and delivered to the triple-trap mass spectrometer ISOLTRAP. The doubly charged ions that survived the charge-exchange processes during bunching and ion preparation were transferred to a precision Penning trap for mass determination. Mass values were obtained for the isotopes with mass numbers A=126,129,130,136. They are consistent with previous results except for the case of $^{126}Xe$ where a significant deviation from the literature value was found. …
Search for Axionlike Dark Matter through Nuclear Spin Precession in Electric and Magnetic Fields
2017
We report on a search for ultralow-mass axionlike dark matter by analyzing the ratio of the spinprecession frequencies of stored ultracold neutrons and 199Hg atoms for an axion-induced oscillating electric dipole moment of the neutron and an axion-wind spin-precession effect. No signal consistent with dark matter is observed for the axion mass range 10−24 ≤ ma ≤ 10−17 eV. Our null result sets the first laboratory constraints on the coupling of axion dark matter to gluons, which improve on astrophysical limits by up to 3 orders of magnitude, and also improves on previous laboratory constraints on the axion coupling to nucleons by up to a factor of 40. ispartof: Physical Review X vol:7 issue:…
The bromine nuclear quadrupole moment revisited
2013
For the bromine atom and the hydrogen bromide molecule, we report results for the electric-field gradient at the bromine nucleus based on quantum-chemical calculations. Highly accurate values are obtained by using coupled-cluster methods for the treatment of electron correlation, by minimising remaining basis-set effects through the use of large atomic-orbital sets, and by taking into account relativistic effects. For hydrogen bromide, zero-point vibrational corrections are considered as well. The obtained results for the bromine electric-field gradients are used to derive values for the Br-79 quadrupole moment: 308.1 and 309.3 mb based on data for the bromine atom and hydrogen bromide, res…