Threshold scan of the Ne 2s-electron photoionization cross edition

The photoionization of the Ne 2s-electrons was studied from threshold to 1 eV above threshold. The technique of photon-induced fluorescence spectroscopy was applied. Pronounced structures were observed resulting from autoionization of doubly excited atomic states. A threshold cross section of 0.17 Mb was determined.

State-selective study of the direct double photoionization of the Ne valence shell

Cross sections for double photoionization of the Ne L shell into the 2s2p{^5 3}P^0} and ^1P^0 and the 2s^02p^6 ^1S^e states were measured for energies from threshold up to 150 eV, using photon induced fluorescence spectroscopy. Both 2s2p^5 channels were observed with comparable magnitude in contradiction to a propensity rule based on the Wannier-Peterkop-Rau theory. A comparison of the summed ^3P^0 and ^1P^0 cross sections with MBPT calculations results in a deviation of 50%.

Influence of occupation number of single particle levels on K - K charge transfer in collisions of 90 keV - Ne{^9+} on Ne

The influence of the occupation of the single particle levels on the impact parameter dependent K - K charge transfer occuring in collisions of 90 keV Ne{^9+} on Ne was studied using coupled channel calculations. The energy eigenvalues and matrixelements for the single particle levels were taken from ab initio self consistent MO-LCAO-DIRAC-FOCK-SLATER calculations with occupation numbers corresponding to the single particle amplitudes given by the coupled channel calculations.

The Li-like KLL-Auger spectrum of foil excitation Ne-projectiles

KLL-Auger transitions of the three electron system in Ne have been recorded in a coincidence experiment frec of contaminants from other systems. Energies as well as intensities are compared with calculated values.

Many electron coupled channel calculations for the system F{^8+} - Ne

To describe the time dependence of an atomic collision system the Dirac equation usually is rewritten in a coupled channel equation. We first discuss part of the approximation used in this approach and the connection of the many particle with the one particle interpretation. The coupled channel equations are solved for the system F{^8+} - Ne using static selfconsistent many electron Dirac-Fock-Slater wavefunctions as basis. The resulting P(b) curves for the creation of a Ne K-hole are in reasonable agreement with the experimental results.

Compostatge : algunes formes de fer-ne. 'Compostaje : algunas formas de hacerlo'.

Resumen tomado de la revista

Aprofitem els nostres parcs : Traguem-ne suc!. 'Aprovechemos nuestros parques : Saquémosle jugo'.

Se presentan las aplicaciones educativas que puede ofrecer un parque. A partir del estudio del Parque Güell y el Laberinto de Horta se pueden realizar actividades en el aula que sirvan como ejemplo para el uso de otros entornos urbanos.

L'esforç reflexiu de fer-ne, de la vida, una història. 'El esfuerzo reflexivo de hacer, de la vida, una historia'.

Se expone la importancia de las historias de vida como constructoras de la identidad individual. Se intenta descubrir e inventar el yo, como potenciador de un proyecto personal de vida. La identidad se muestra como un concepto esencial en la naturaleza del trabajo de la persona, incluyendo aspectos como las motivaciones, la satisfacción y las competencias.

Lire pour écrire. Je ne suis pas d'acord!. Je cherche, je trouve!. 'Leer para escribir.No estoy de acuerdo!. ­Busco, encuentro!'.

Crédito de lengua francesa para alumnos de ESO. Los objetivos son: acercarse a la realidad francesa mediante contactos directos; describir una situación; dar la opinión y justificarla; escribir correctamente; autoorganizarse colectivamente; expresar los sentimientos propios y los deseos; identificar las funciones de un texto y encontrar las principales informaciones; dirigirse al grupo-clase en lengua francesa y escribir una carta. Se divide en 2 dosieres: estados de ánimo y sentimientos e introducción a una lectura activa, cada uno con sus correspondientes actividades.

De la infecció pel VIH-Sida parlem-ne amb Bristol-Myers. 'Hablemos de la infección por VIH-Sida con Bristol-Myers'.

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Reflexionem sobre la llengua per millorar-ne l'??s

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Per saber-ne m??s sobre narracions visuals

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Llibres de text i digitalitzaci?? de les aules : parlem-ne

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Selected configuration interaction with truncation energy error and application to the Ne atom

Selected configuration interaction (SCI) for atomic and molecular electronic structure calculations is reformulated in a general framework encompassing all CI methods. The linked cluster expansion is used as an intermediate device to approximate CI coefficients BK of disconnected configurations (those that can be expressed as products of combinations of singly and doubly excited ones) in terms of CI coefficients of lower-excited configurations where each K is a linear combination of configuration-state-functions (CSFs) over all degenerate elements of K. Disconnected configurations up to sextuply excited ones are selected by Brown's energy formula, ΔEK=(E-HKK)BK2/(1-BK2), with BK determined from coefficients of singly and doubly excited configurations. The truncation energy error from disconnected configurations, Δdis, is approximated by the sum of ΔEKS of all discarded Ks. The remaining (connected) configurations are selected by thresholds based on natural orbital concepts. Given a model CI space M, a usual upper bound ES is computed by CI in a selected space S, and EM=E S+ΔEdis+δE, where δE is a residual error which can be calculated by well-defined sensitivity analyses. An SCI calculation on Ne ground state featuring 1077 orbitals is presented. Convergence to within near spectroscopic accuracy (0.5 cm-1) is achieved in a model space M of 1.4× 109 CSFs (1.1 × 1012 determinants) containing up to quadruply excited CSFs. Accurate energy contributions of quintuples and sextuples in a model space of 6.5 × 1012 CSFs are obtained. The impact of SCI on various orbital methods is discussed. Since ΔEdis can readily be calculated for very large basis sets without the need of a CI calculation, it can be used to estimate the orbital basis incompleteness error. A method for precise and efficient evaluation of ES is taken up in a companion paper

Avaluació dels recursos d'àrids disponibles en medis fluvials mitjançant tècniques geofisiques. Aplicació a la cubeta de Celrà (Riu Ter, Ne Catalunya)

The depth of the water table and the clay content are determinant factors for the exploitability of natural aggregates, such as the alluvial sands and gravels found on the fluvial domain of the Ter River. In this preliminary study, carried out in the Celri basin, we conclude that these variables can be determined by means of geophysical methods and recornmends the use of such methods in studies of regional character