First clear evidence of quantum chaos in the bound states of an atomic nucleus

We study the spectral fluctuations of the $^{208}$Pb nucleus using the complete experimental spectrum of 151 states up to excitation energies of $6.20$ MeV recently identified at the Maier-Leibnitz-Laboratorium at Garching, Germany. For natural parity states the results are very close to the predictions of Random Matrix Theory (RMT) for the nearest-neighbor spacing distribution. A quantitative estimate of the agreement is given by the Brody parameter $\omega$, which takes the value $\omega=0$ for regular systems and $\omega \simeq 1$ for chaotic systems. We obtain $\omega=0.85 \pm 0.02$ which is, to our knowledge, the closest value to chaos ever observed in experimental bound states of nuclei. By contrast, the results for unnatural parity states are far from RMT behavior. We interpret these results as a consequence of the strength of the residual interaction in $^{208}$Pb, which, according to experimental data, is much stronger for natural than for unnatural parity states. In addition our results show that chaotic and non-chaotic nuclear states coexist in the same energy region of the spectrum.Comment: 9 pages, 1 figur

Ontology Access in Grid Environments with WS-DAIOnt and the RDF(S) Realization

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The Semantic Web Framework: a component-based framework for the development of Semantic Web applications

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Facilitating Requirements Engineering of Semantic applications

This paper presents a detailed Requirements Engineering process for the development of semantic applications. It presents the activities for requirements elicitation and analysis and shows how to follow these activities in an example case study. To facilitate its use by software engineers that are not experts in semantic technologies, several resources are provided, namely a comprehensive collection of the characteristics of semantic applications and two catalogues of use cases and system models

Benchmarking Faddeev and transfer-to-the-continuum calculations for ( p , p N ) reactions

Background: Nucleon-knockout reactions on proton targets (p, pN) have experienced a renewed interest due to the availability of inverse-kinematics experiments with exotic nuclei. Various theoretical descriptions have been used to describe these reactions, such as the distorted-wave impulse approximation, the Faddeev-type formalism, and the transfer-to-the-continuum method. Purpose: Our goal is to benchmark the observables computed with the Faddeev and transfer-to-the-continuum formalisms in the intermediate energy regime relevant for the experimental (p, pn) and (p, 2p) studies. Method: We analyze the 11Be(p, pn) 10Be reaction for different beam energies, binding energies, and orbital quantum numbers with both formalisms to assess their agreement for different observables. Results: We obtain a good agreement in all cases considered, within ≈10%, when the input potentials are taken consistently and realistically. Conclusions: The results of this work prove the consistency and accuracy of both methods, setting an indication on the degree of systematic uncertainties applicable when using them to extract spectroscopic information from (p, pN) reactions.Ministerio de Ciencia, Innovación y Universidades de España y fondos FEDER. FIS2017-88410-PPrograma de investigación e innovación Horizonte 2020 de la Unión Europea. No. 654002.Alexander von Humboldt Foundation. Alemania. LTU-1185721-HFST-

Four-body continuum-discretized coupled-channels calculations: Application to 6He+64Zn at 13.6 MeV

The recently developed four-body continuum-discretized coupled-channels (CDCC) method, making use of the binning procedure [1], is applied to the reaction 6He+64Zn at 13.6 MeV (around the Coulomb barrier). Excellent agreement with available elastic data [2] is found.Dirección General de Investigación Científica y Técnica FIS 2008-04189, FPA 2006- 13807-C02-01U.S. Department of Energy DE-AC52-07NA27344U.K. STFC EP/D00362

El Origen Fáctico y Epistemológico de la Prueba en el Sistema Penal Acusatorio

  The investigation ordered by the Public Ministry before a criminal act is the beginning of a criminal process brought to court by the competent authorities; however, the investigation is the beginning of an entire judicial process that requires strict compliance not only with the rules established in the Penal Code and the Criminal Procedure Code, but also in the constitutional precepts and international conventions that recognize the legitimate rights of people in due process. That is because this investigation aims to show that due process before a criminal act typified in the Penal Code, begins with the judicial investigation ordered by the Public Ministry, is obliged to follow the protocol as established by the Law, as a guarantee of due process, in the development of the hearing, without prejudice to the rights of the parties, especially the alleged or alleged identified and investigated and linked to the facts under investigation.   The investigation in the new Accusatory Penal System is the backbone of any process, it is the facts that will allow the Judge of the case to establish according to his expertise the degree of responsibility that assists those indicated by the investigation, However, it is of interest to highlight that the compilation of the evidence that will determine how the facts were developed must pass through the sieve of the clinical eye of the administrator of justice, listening and taking only what is relevant from the contributions provided by the Prosecutor of the case, of the witnesses and finally of the version narrated by the parties according to their truths, the factual facts will come to light despite the interest of the parties in said trial, the preliminary investigation allows the Judge to determine the veracity of the evidence presented in order to avoid affecting consecrated rights and thus make a decision as close to what really happened, therefore the epistemology of the facts and proofs. Bases collected will be at the end, the legal basis that will facilitate at the end of the process, the resolution, argued, reasoned and supported by the Judge of the case.La investigación ordenada, por el Ministerio Publico ante un hecho delictivo, es el inicio de un proceso penal llevado a los tribunales por las autoridades competentes, sin embargo es la investigación el inicio de  todo un proceso  judicial que requiere del estricto cumplimiento, no solo de las normas establecidas en el Código Penal y el Código Procesal Penal, sino también de los preceptos constitucionales y las convenciones Internacionales que reconocen los legítimos  derechos de las personas en el debido proceso. Es por ello que esta investigación pretende demostrar que el debido proceso, ante  un hecho delictivo tipificado en el Código Penal, se inicia con la investigación judicial ordenada por el Ministerio Publico, está obligada a seguir  el protocolo como lo establece la Ley, como garantía  del debido proceso, en el desarrollo de la audiencia, sin menoscabo de los derechos que le asisten a las partes, en especial al presunto o  los presuntos señalados e investigados y vinculados  a los hechos que se investiga.   La investigación en el nuevo Sistema Penal Acusatorio, es la columna vertebral de todo proceso, son los hechos los que van a permitir al Juez de la causa establecer, de acuerdo a su experticia, el grado de responsabilidad que le asiste a los señalados por la investigación, sin embargo es de interés resaltar que la compilación de las pruebas que van a determinar cómo se desarrollaron los hechos, deben pasar por el tamiz del ojo clínico del administrador de justicia, escuchando y tomando solo lo relevante de los aportes que brinda el Fiscal de la causa, de los testigos y por último de la versión narrada por las partes según sus verdades. Los hechos fácticos saldrán a relucir a pesar del interés que tengan las partes en dicho juicio, la investigación preliminar permite al Juez determinar la veracidad de las pruebas presentada  con el fin de evitar afectar derechos consagrados y así tomar una decisión lo más apegada posible a lo que realmente sucedió,  por lo tanto la epistemología de los hechos y  las pruebas recabadas serán el fundamento jurídico que determinaran  al final del proceso, la resolución, argumentada, razonada  y sustentada por el  Juez de la causa.  &nbsp