Flerovium spectroscopy – benchmarking nuclear theory at proton number Z = 114

In the wake of the discovery of superheavy elements, nuclear spectroscopy experiments aim at providing anchor points at the uppermost end of the nuclear chart for nuclear structure theory, which otherwise had to solely rely on extrapolations. In two runs in 2019 and 2020, such a nuclear spectroscopy experiment was conducted to study α-decay chains stemming from isotopes of flerovium (element Z = 114). One incentive to study flerovium isotopes is that many, but not all, nuclear structure models or model parametrizations favour Z = 114 as the next magic proton number beyond lead, Z = 82

Enfermedad de Charcot Marie Tooth en adulto joven

Objective: To present the presentation of primary genetic neuropathies. Case presentation: We present the case of a young adult patient from a rural area with onset in adolescence of difficulty running and multiple falls associated with decreased strength, on physical examination hand with contractures, muscle atrophy and decreased reflexes, electromyography is sent with generalized peripheral polyneuropathy and mixed symmetrical motor and sensory conduction block in all nerves explored, genetic study is sent with a diagnostic report of Charcot Marie Tooth disease. Conclusions: It is of great importance for the primary care physician the knowledge of the most frequent primary genetic neuropathy for its adequate diagnostic approach through the use of physical examination and genetic support.Objetivo:  Dar a conocer la presentación de las neuropatías genéticas primarias Presentación del caso: Se presenta el caso de un paciente adulto joven de zona rural con cuadro de inicio en la adolescencia de dificultad para correr y múltiples caídas asociado a disminución de fuerza ,al examen físico mano con contracturas, atrofia muscular y disminución de reflejos ,se envía electromiografía con polineuropatía periférica generalizada y simétrica mixta con bloqueo de conducción motora y sensitiva en todos los nervios explorados, se envía estudio genético con reporte diagnóstico de Enfermedad de Charcot Marie Tooth . Conclusiones: Es de gran importancia para el médico de atención primaria el conocimiento de la neuropatía genética primaria más frecuente para su adecuado enfoque diagnostico mediante el uso de el examen físico y el apoyo genético

XVI International Congress of Control Electronics and Telecommunications: "Techno-scientific considerations for a post-pandemic world intensive in knowledge, innovation and sustainable local development"

Este título, sugestivo por los impactos durante la situación de la Covid 19 en el mundo, y que en Colombia lastimosamente han sido muy críticos, permiten asumir la obligada superación de tensiones sociales, políticas, y económicas; pero sobre todo científicas y tecnológicas. Inicialmente, esto supone la existencia de una capacidad de la sociedad colombiana por recuperar su estado inicial después de que haya cesado la perturbación a la que fue sometida por la catastrófica pandemia, y superar ese anterior estado de cosas ya que se encontraban -y aún se encuentran- muchos problemas locales mal resueltos, medianamente resueltos, y muchos sin resolver: es decir, habrá que rediseñar y fortalecer una probada resiliencia social existente - producto del prolongado conflicto social colombiano superado parcialmente por un proceso de paz exitoso - desde la tecnociencia local; como lo indicaba Markus Brunnermeier - economista alemán y catedrático de economía de la Universidad de Princeton- en su libro The Resilient Society…La cuestión no es preveerlo todo sino poder reaccionar…aprender a recuperarse rápido.This title, suggestive of the impacts during the Covid 19 situation in the world, and which have unfortunately been very critical in Colombia, allows us to assume the obligatory overcoming of social, political, and economic tensions; but above all scientific and technological. Initially, this supposes the existence of a capacity of Colombian society to recover its initial state after the disturbance to which it was subjected by the catastrophic pandemic has ceased, and to overcome that previous state of affairs since it was found -and still is find - many local problems poorly resolved, moderately resolved, and many unresolved: that is, an existing social resilience test will have to be redesigned and strengthened - product of the prolonged Colombian social conflict partially overcome by a successful peace process - from local technoscience; As Markus Brunnermeier - German economist and professor of economics at Princeton University - indicates in his book The Resilient Society...The question is not to foresee everything but to be able to react...learn to recover quickly.Bogot

Study of the nuclear continuum using high resolution gamma and charged-particle spectroscopy

Abstract. We have used the 36Ar +28Si at 142 MeV fusion-evaporation nuclear reaction using the ArgonneTandem-Linac Accelerator System (ATLAS) accelerator facility in conjunction with Gammasphere and the Lund University andWashington University Silicon Array (LuWuSiA) for charged-particle spectroscopy at the Argonne National Laboratory. The high resolution and high granularity of the LuWuSiA array allow us to measure with very good accuracy the charged-particles energy and angular information. We use the experimental results and compare them to a simulation carried out with the code PaceTlm to extract information about the shape of the emitting nucleus at high excitation energy, E* ≈ 65MeV, and high angular momentum J ≈ 40ћ. The results of the simulation suggest that the ∞ particles are very sensitive to the nuclear deformation unlike protons and neutrons. At large compound nucleus deformation (ᵝ= 0:3), the -particles energy spectrum seems to develop an extra maximum suggesting fingerprints of the initial deformation. The setup LuWuSiA was fully simulated using Geant4 to help the data analysis and improve the interpretation of the experimental results.Hemos usado la reacción de fusión-evaporación 36Ar+28Si a 142MeV usando la facilidad del acelerador lineal tandem del laboratorio Argonne, USA (ATLAS por sus siglas en inglés) en conjunto con Gammasphere y el arreglo de detectores LuWuSiA para espectroscopía de partículas cargadas. La alta resolución y alta granularidad del sistema LuWuSiA nos permite medir con buena precisión la energía y la información angular de las partículas cargadas. Los resultados experimentales son usados para compararlos con una simulación llevada a cabo con el código PaceTlm para extraer información acerca de la forma del núcleo emisor a altas energías de excitación, E* .̴65MeV, y alto momento angular J ̴ 40. Los resultados de la simulación sugieren que las partículas ∞ son muy sensibles a la deformación nuclear contrario a lo que pasa con los protones y los neutrones. A altas deformaciones del núcleo compuesto (ᵝ = 0:3) el espectro de energía de las partículas ∞ parecen desarrollar un máximo extra sugiriendo una huella digital de la deformación inicial. El detector LuWuSiA fue completamente simulado con Geant4 para ayudar con el análisis de datos y mejorar la interpretación de los resultados experimentales.Doctorad

Anti-Compton shield for Compex germanium detector modules

A bismuth-germanate (BGO) anti-Compton shield (ACS) for Compex germanium detector modules was designed, built, and characterised. BGO performance was evaluated for light output and energy resolution. The response of the ACS shield and its impact on germanium detector spectra was measured for standard 60Co, 133Ba, and 137Cs sources. The results were compared to comprehensive Geant4 simulations. The ~70% improvement of the peak-to-total ratio for the 137Cs 662-keV γ-ray peak is in good agreement with expectations from the simulations. A 133Ba source exemplifies decay schemes of odd-A superheavy nuclei. Congruence between measured and simulated spectra indicates that the Compex plus ACS multi-detector module is well understood

Low-lying electric dipole γ-continuum for the unstable 62,64Fe nuclei: Strength evolution with neutron number

The γ-ray emission from the nuclei 62,64Fe following Coulomb excitation at bombarding energy of 400-440 AMeV was measured with special focus on E1 transitions in the energy region 4-8 MeV. The unstable neutron-rich nuclei 62,64Fe were produced at the FAIR-GSI laboratories and selected with the FRS spectrometer. The γ decay was detected with AGATA. From the measured γ-ray spectra the summed E1 strength is extracted and compared to microscopic quasi-particle phonon model calculations. The trend of the E1 strength with increasing neutron number is found to be fairly well reproduced with calculations that assume a rather complex structure of the 1− states (three-phonon states) inducing a strong fragmentation of the E1 nuclear response below the neutron binding energy. © 2020 The Author(s

A method of image classification by using multidimensional scaling

In this paper, a method for image classification based on multidimensional scaling (MDS) is presented. Once the image has been fragmented into smaller cells and the wavelet decomposition has also been performed, up to a certain level, statistics are obtained from the new cells with the aim of constructing vectors of characteristics of the original image. Then, these vectors are grouped in a matrix and the MDS of said matrix is performed. Finally, the principal coordinates of the MDS indicate the proximity between vectors and, therefore, between images

Current Status and Future Prospects for the Light Dark Matter eXperiment

The constituents of dark matter are still unknown, and the viable possibilities span a vast range of masses. The physics community has established searching for sub-GeV dark matter as a high priority and identified accelerator-based experiments as an essential facet of this search strategy. A key goal of the accelerator-based dark matter program is testing the broad idea of thermally produced sub-GeV dark matter through experiments designed to directly produce dark matter particles. The most sensitive way to search for the production of light dark matter is to use a primary electron beam to produce it in fixed-target collisions. The Light Dark Matter eXperiment (LDMX) is an electron-beam fixed-target missing-momentum experiment that realizes this approach and provides unique sensitivity to light dark matter in the sub-GeV range. This contribution provides an overview of the theoretical motivation, the main experimental challenges, how LDMX addresses these challenges, and projected sensitivities. We further describe the capabilities of LDMX to explore other interesting new and standard physics, such as visibly-decaying axion and vector mediators or rare meson decays, and to provide timely electronuclear scattering measurements that will inform the modeling of neutrino-nucleus scattering for DUNE.Comment: 26 pages, 17 figures. Contribution to Snowmass 202

Revista CreSER Universidad del Rosario

“Las historias de vida de los estudiantes hacen parte de nuestro patrimonio como institución, queremos dejar constancia de esto; cada una de las potentes voces que acompañan el primer número de esta revista constituyen un aporte a lo que nos define como universidad”... Juan Felipe Córdoba Restrepo, Director Editorial, Universidad del Rosario“The life stories of the students are part of our heritage as an institution, we want to record this; each of the powerful voices that accompany the first issue of this magazine constitute a contribution to what defines us as a university”... Juan Felipe Córdoba Restrepo, Director Editorial, Universidad del Rosari