Search results for "WEC"
showing 10 items of 82 documents
Dawning of the N=32 shell closure seen through precision mass measurements of neutron-rich titanium isotopes
2018
A precision mass investigation of the neutron-rich titanium isotopes 51 − 55 Ti was performed at TRIUMF’s Ion Trap for Atomic and Nuclear science (TITAN). The range of the measurements covers the N = 32 shell closure, and the overall uncertainties of the 52 − 55 Ti mass values were significantly reduced. Our results conclusively establish the existence of the weak shell effect at N = 32 , narrowing down the abrupt onset of this shell closure. Our data were compared with state-of-the-art ab initio shell model calculations which, despite very successfully describing where the N = 32 shell gap is strong, overpredict its strength and extent in titanium and heavier isotones. These measurements a…
Merkels Briefwechsel
2018
Informācija par G. H. Merķeļa vēstuļu kolekciju Latvijas Universitātes Akadēmiskajā bibliotēkā
Savigny a Bethmann-Hollweg, 27 agosto 1817: diritto e fede nella Historische Rechtsschule
2020
An unpublished letter written by Savigny to Bethmann-Hollweg in August 1817 provides a starting point for thinking about the relationship between the religious ideology of the Christian Revival (Erweckungsbewegung) , Prussian nationalism and the concept of law within the German Historical School.
First Results on the Scalar WIMP-Pion Coupling, Using the XENON1T Experiment
2018
We present first results on the scalar coupling of weakly interacting massive particles (WIMPs) to pions from 1 t yr of exposure with the XENON1T experiment. This interaction is generated when the WIMP couples to a virtual pion exchanged between the nucleons in a nucleus. In contrast to most nonrelativistic operators, these pion-exchange currents can be coherently enhanced by the total number of nucleons and therefore may dominate in scenarios where spin-independent WIMP-nucleon interactions are suppressed. Moreover, for natural values of the couplings, they dominate over the spin-dependent channel due to their coherence in the nucleus. Using the signal model of this new WIMP-pion channel, …
Shell evolution of $N=40$ isotones towards $^{60}$Ca: First spectroscopy of $^{62}$Ti
2020
7 pags., 4 figs., 1 tab.
Civilrechtliche Entscheidungen der Riga'schen Stadtgerichte. Band 7
1885
Near 100% Renewable Island with sea wave energy. The case study of Pantelleria in Mediterranean sea
2016
The first aim of this work is to explore the possibility of the transition of a real islanded network from one that is “fuel-based” to a “renewable-based” one. This transition is analysed for the real MV/LV distribution system of the island of Pantelleria, in the Mediterranean Sea. Particularly, this work is focused on a Renewable source nowadays totally unused: wave energy. Thanks to the innovative generator prototype designed by Department of Energy of University of Palermo (Italy), wave energy is able to represent a primary source for the production of electric energy in the Mediterranean islands. The procedures applied in the present article, as well as the main equations used, are the …
Can headache impair intellectual abilities in children? An observational study
2012
Maria Esposito,1 Antonio Pascotto,1 Beatrice Gallai,3 Lucia Parisi,2 Michele Roccella,2 Rosa Marotta,4 Serena Marianna Lavano,4 Antonella Gritti,5 Giovanni Mazzotta,6 Marco Carotenuto11Center for Childhood Headache, Clinic of Child and Adolescent Neuropsychiatry, Second University of Naples, Naples, 2Child Neuropsychiatry, Department of Psychology, University of Palermo, Palermo, 3Unit of Child and Adolescent Neuropsychiatry, University of Perugia, Perugia, 4Department of Psychiatry, “Magna Graecia” University of Catanzaro, Catanzaro, 5Suor Orsola Benincasa University, Napoli, 6Unit of Child and Adolescent Neuropsychiatry, Azienda Sanitaria Locale 4, Terni, ItalyBackgrou…
Dispersion relations applied to double-folding potentials from chiral effective field theory
2020
We present a determination of optical potentials using the double-folding method based on chiral effective field theory nucleon-nucleon interactions at next-to-next-to-leading order combined with dispersion relations to constrain the imaginary part. This approach is benchmarked on O16-O16 collisions, and extended to the C12-C12 and C12-O16 cases. Predictions derived from these potentials are compared to data for elastic scattering at energies up to 1000 MeV, as well as for fusion at low energy. Without adjusting parameters, excellent agreement with experiment is found. In addition, we study the sensitivity of the corresponding cross sections to the nucleon-nucleon interactions and nuclear d…
Probing chiral interactions up to next-to-next-to-next-to-leading order in medium-mass nuclei
2019
We study ground-state energies and charge radii of closed-shell medium-mass nuclei based on novel chiral nucleon-nucleon (NN) and three-nucleon (3N) interactions, with a focus on exploring the connections between finite nuclei and nuclear matter. To this end, we perform in-medium similarity renormalization group (IM-SRG) calculations based on chiral interactions at next-to-leading order (NLO), N$^2$LO, and N$^3$LO, where the 3N interactions at N$^2$LO and N$^3$LO are fit to the empirical saturation point of nuclear matter and to the triton binding energy. Our results for energies and radii at N$^2$LO and N$^3$LO overlap within uncertainties, and the cutoff variation of the interactions is w…