Laser pointer maculopathy. A new public health problem?

pre-print186 K

Maculopatía por puntero láser. ¿Un nuevo problema de salud pública?

Available online 13 October 2016, publicado en papel n enero de 2017Depto. de Optometría y VisiónSección Deptal. de Óptica (Óptica)Fac. de Óptica y OptometríaTRUEpu

Cambios precoces en la tomografía de coherencia óptica en un niño con maculopatía inducida por puntero láser.

Niño de 9 años de edad, que refiere pérdida visual en su ojo derecho, después de jugar con un puntero láser. En la primera exploración (12h después) la agudeza visual (AV) era 0,15, la fóvea presentaba una lesión hipopigmentada, y la tomografía de coherencia óptica (OCT) demuestra la presencia de bandas hiperreflectivas verticales. Al cabo de 6 meses, la AV había mejorado a 0,5 y se aprecia en la OCT un área bien definida de interrupción de la retina externa. Discusión Un inadecuado uso de los punteros láser, puede producir pérdida visual severa e irreversible.pre-print671 K

Study of the break-up channel in 11Li+208Pb collisions at energies around the Coulomb barrier

We present a study of 11Li+208 Pb collisions at energies around the Coulomb barrier (Elab = 24.3 and 29.8 MeV), measured at the post-accelerated beam facility, ISAC II, at TRIUMF (Vancouver, Canada). A remarkably large yield of 9Li has been observed, a result that is attributed to the weak binding of the 11Li nucleus. The angular distribution of this 9Li yield, relative to the elastic one, has been analysed in terms of first-order semiclassical calculations as well as four-body and three-body Continuum-Discretized Coupled-Channels (CDCC) calculations, based on a three-body and di-neutron model of the 11Li nucleus, respectively. The calculations reproduce well the trend of the data and support the existence of a large concentration of B (E1) strength at very low excitation energies. The connection of this large B (E1) with a possible low-lying dipole resonance is discussed

Scattering of the Halo Nucleus 11Be on 197Au at Energies around the Coulomb Barrier

Angular distributions of the elastic, inelastic, and breakup cross sections of the halo nucleus 11Be on197 Au were measured at energies below (Elab =31.9 MeV) and around (39.6 MeV) the Coulomb barrier. These three channels were unambiguously separated for the first time for reactions of 11Be on a high-Z target at low energies. The experiment was performed at TRIUMF (Vancouver, Canada). The differential cross sections were compared with three different calculations: semiclassical, inert-core continuum-coupled-channels and continuum-coupled-channels ones with including core deformation. These results show conclusively that the elastic and inelastic differential cross sections can only be accounted for if core-excited admixtures are taken into account. The cross sections for these channels strongly depend on the β (E1) distribution in 11Be, and the reaction mechanism is sensitive to the entanglement of core and halo degrees of freedom in 11Be.Ministerio de Economía y Competitividad FPA2015-64969-P, FIS2014-53448-C2-1-P, FPA2013-47327-c02-01-R, FPA2012-32443, FIS2013-41994-PCentro Nacional de Física de Partículas, Astropartículas y Nuclear CSD2007- 00042European Collaborative Research EUI-2009-04162European Unions 654002Nuclear Astrophysics Virtual Institute VH-VI-417European Commission, Seventh Framework Program 60037

Elastic scattering of 9Li on 208Pb at energies around the Coulomb barrier

We have studied the dynamical effects of the halo structure of 11Li on the scattering on heavy targets at energies around the Coulomb barrier. This experiment was performed at ISAC-II at TRIUMF with a world record in production of the post-accelerated 11Li beam. As part of this study we report here on the first measurement of the elastic cross section of the core nucleus, i.e. 9Li on 208Pb, at energies around the Coulomb barrier. A preliminary optical model analysis has been performed in order to extract a global optical potential to describe the measured angular distributions

Dynamic studies of 11Li and its core 9Li on 208Pb near the Coulomb barrier

We measured the scattering of the halo nucleus 11Li and its core 9Li on the lead target at TRIUMF at energies below and around to the Coulomb barrier. We report here on our preliminary analysis of the inclusive breakup reaction

Elastic scattering and α -particle production in 6 He + 208 Pb collisions at 22 MeV

Experimental results of the elastic scattering of 6He on 208Pb at E LAB=22 MeV, measured at the CRC facility (Louvain-la-Neuve, Belgium), are presented, including results on the 4He production channel. These data were taken with full angular coverage and high angular resolution. Both experimental cross sections are compared with continuum discretized coupled channels and distorted-wave Born approximation calculations, where direct breakup and transfer to the continuum processes are considered. The elastic data confirm the absence of the Coulomb rainbow, while the distribution of α particles indicates that such production is mostly generated by transfer to the continuum.MICINN FPA2005-04460 FPA200502379 FPA2006-13807-c02-01 FPA2007-63074 FPA2009-07653 FPA2009-07387 FPA2010-22131-C02-01Junta de Andalucía FQM-4964Programa Consolider-Ingenio 2010 CSD2007-00042Comisión Europea HPRI-CT-1999-0011

Arte Rupestre en el Karst de Ojo Guareña (Merindad de Sotoscueva-Burgos) : trabajos de documentación y estudio en «La Sala de La Fuente»

La amplia nómina de autores que firman el presente artículo dan forma al equipo multidisciplinar que en 1995 inició un ambicioso proyecto, subvencionado por la Junta de Castilla y León, denominado «Trabajos de Documentación y Estudio del Arte Rupestre en el Karst de Ojo Guareña». El avance de sus primeros trabajos está recogido en el siguiente texto y fue presentado al Primer Congreso de Arqueología Burgalesa (1998), mas, al no haberse publicado éste, sigue aún inédito. Su interés, y de forma especial la continuidad de la investigación, aconseja a los autores su edición en Espacio, Tiempo y Forma con vistas a una mayor difusión del proyecto y, con ello, a un mejor conocimiento de la grafía rupestre de las galerías subterráneas del norte de la provincia de Burgos.The wide number of researchers who sign the present añide joined in the multi-discipline team that started an ambitious project, which was sponsored by the regional authority: Junta de Castilla y León, called «Records and Research on Cave Art at the karst in Ojo Guareña». The deveiopment of thelr first researches Is shown in the present Ítem and it was also presented in the First Burgos Archaeology Congress (1998), although it is still unavailable since it has never been published. Both, the Importance of its contents and specially the continuity of the research led its authors to publish this article in Espacio, Tiempo y Forma so that the project could be widely known and, at the same time, provide a better knowledge of rock graphics in the underground galleries which can be found in the north of Burgos province

High intensity neutrino oscillation facilities in Europe

The EUROnu project has studied three possible options for future, high intensity neutrino oscillation facilities in Europe. The first is a Super Beam, in which the neutrinos come from the decay of pions created by bombarding targets with a 4 MW proton beam from the CERN High Power Superconducting Proton Linac. The far detector for this facility is the 500 kt MEMPHYS water Cherenkov, located in the Fréjus tunnel. The second facility is the Neutrino Factory, in which the neutrinos come from the decay of μ+ and μ− beams in a storage ring. The far detector in this case is a 100 kt magnetized iron neutrino detector at a baseline of 2000 km. The third option is a Beta Beam, in which the neutrinos come from the decay of beta emitting isotopes, in particular He6 and Ne18, also stored in a ring. The far detector is also the MEMPHYS detector in the Fréjus tunnel. EUROnu has undertaken conceptual designs of these facilities and studied the performance of the detectors. Based on this, it has determined the physics reach of each facility, in particular for the measurement of CP violation in the lepton sector, and estimated the cost of construction. These have demonstrated that the best facility to build is the Neutrino Factory. However, if a powerful proton driver is constructed for another purpose or if the MEMPHYS detector is built for astroparticle physics, the Super Beam also becomes very attractive