Development of the self-calibration technique for γ -ray energy tracking arrays

Determining the three-dimensional γ -ray interaction position in γ -ray tracking arrays is achieved by comparing in real time the measured electronic signals against a pre-generated library of calculated signals (signal basis) that maps the detector response throughout the crystal volume. Obtaining a high-fidelity signal basis remains a significant technological challenge that often limits the ultimate performance of the arrays. To address this, a self-calibration method was proposed to generate the signal basis experimentally, in an iterative way and in situ; its potential has been demonstrated in a proof-of-concept study using a simplistic geometry. In this article, we extend and refine this innovative technique for γ -ray tracking arrays using realistic simulations of the actual crystal geometries and including pulse-shape analysis that mimics the reconstruction that takes place experimentally. Key factors determining the performance of the method, such as the conditions for position convergence, statistical requirements, the impact of convoluting electronic noise to the signals, and the time alignment are investigated systematically within this framework. The results show that the method is robust and holds promise for generating high-fidelity signal basis experimentally. The analysis framework established in this work sets the stage for applying the self-calibration technique to real experimental data

Coulomb dissociation of <SUP>20,21</SUP>N

Neutron-rich light nuclei and their reactions play an important role in the creation of chemical elements. Here, data from a Coulomb dissociation experiment on N20,21 are reported. Relativistic N20,21 ions impinged on a lead target and the Coulomb dissociation cross section was determined in a kinematically complete experiment. Using the detailed balance theorem, the N19(n,γ)N20 and N20(n,γ)N21 excitation functions and thermonuclear reaction rates have been determined. The N19(n,γ)N20 rate is up to a factor of 5 higher at T<1GK with respect to previous theoretical calculations, leading to a 10% decrease in the predicted fluorine abundance

喜劇「イタリアの麦わら帽子」五幕（１８５１ 年）

departmental bulletin pape

Lifetime measurements of excited states in ¹⁶³W and the implications for the anomalous B(E2) ratios in transitional nuclei

This letter reports lifetime measurements of excited states in the odd-N nucleus 163W using the recoil-distance Doppler shift method to probe the core polarising effect of the i13/2 neutron orbital on the underlying soft triaxial even-even core. The ratio B(E2:21/2⁺ → 17/2⁺)/B(E2:17/2⁺ → 13/2⁺) is consistent with the predictions of the collective rotational model. The deduced B(E2) values provide insights into the validity of collective model predictions for heavy transitional nuclei and a geometric origin for the anomalous B(E2) ratios observed in nearby even-even nuclei is proposed

Un sombrero de paja de Italia : comedia en dos actos, divididas en cinco cuadros, con cantables

En port.: "Premio Nacional de Teatro, 1952"Na port.: "Premio Nacional de Teatro, 1952

Système contextuel de reconnaissance structurelle de symboles, basé sur une méthodologie de construction d'objets

Dans cet article, nous présentons un système de reconnaissance de symboles appliqué aux documents graphiques. Celui-ci est basé sur une approche contextuelle de reconnaissance structurelle de symboles exploitant sur une Méthodologie de Construction d'Objets. Il exploite une librairie de traitements composée d'extracteurs de primitives graphiques essentiellement structurelles, et de traitements d'évaluation contextuelle. Ces traitements sont automatiquement contrôlés par un moteur d'inférence durant le processus de reconnaissance. Les connaissances factuelles, stratégiques, et descriptives du système sont structurées selon une Méthodologie de Construction d'Objets fonction de l'application de reconnaissance. Cette structuration originale des connaissances permet au système d'accroître ses performances de reconnaissance. Nous illustrons l'intérêt de cette approche à travers des résultats sur un jeu test de symboles du concours GREC2003

Un chapeau de paille d’Italie : comédie en cinq actes, mêlée de couplets: représentée pour la première fois, à Paris, sur le Théâtre du Palais-Royal, le 14 aôut 1851

Versión dixitalizada da edición publicada no 2004, na Coruña, pola Biblioteca-Arquivo Teatral "Francisco Pillado Mayor", na súa Serie Vermella, v. 31Ed. bilingüe, en francés e galeg