Low-lying levels in Pm148

The Sm149(d,3He) reaction has been used to populate levels in Pm148. Nineteen new excited states have been observed below 1 MeV excitation energy in Pm148. The possible astrophysical implications of these results are discussed

C10 and 11B+ 12C reactions from 4 to 9 MeV/nucleon

Reaction products arising from the interaction of 11B+ 12C and 10B+ 13C have been studied in the energy range 4<Elab(B)<9 MeV/nucleon. From the total fusion cross sections for the two entrance channels, the critical angular momenta have been extracted and then compared as a function of compound nucleus excitation energy. Even though a limitation in the fusion cross section was observed, no common limitation was found in the critical angular momenta for these two systems up to at least a Na23 excitation energy of 60 MeV. Above this excitation energy, the experimental uncertainties make this point less clear. Up to an excitation energy of 60 MeV in Na23, a fusion limitation based on reaching a critical density of compound nucleus states like the yrast or ''statistical'' yrast line cannot be responsible for the fusion cross section limitations observed for these entrance channels. The present data suggest that competing entrance channel processes are responsible for the observed fusion cross section limitations

Evaporation residue cross sections and average neutron multiplicities in the 64Ni+92Zr and 12C+144Sm reactions leading to 156Er

Evaporation residue cross sections and neutron multiplicity distributions have been measured for the 12C + 144Sm and 64Ni + 92Zr reactions leading to the same compound nucleous 156Er. Statistical model calculations can account for the data in the 12C-induced reaction. In contrast, the inhibition of neutron emission with respect to statistical model predictions seen in 64Ni + 92Zr cannot be explained even with the inclusion of the broad angular momentum distributions required to describe the fusion cross section data

Velocity and angular distributions of evaporation residues from induced32 reactions

Velocity distributions of mass-resolved evaporation residues from reactions of S32 with C12, Mg24, Al27, Si28, and Ca40 have been measured at bombarding energies of 194, 239, and 278 MeV using time-of-flight techniques. In all cases, the observed shifts in the velocity centroids relative to the values expected for complete fusion are consistent with a previously reported parametrization of a threshold for onset of incomplete fusion. Angular distributions were measured and total cross sections extracted for the Mg32 system at all three energies. A comparison with existing results for Mg32 at lower energies, and with other systems leading to the Ni56 compound nucleus, suggests two different types of compound-nuclear limitations to complete fusion at higher energies

Influence of nucleon Fermi motion on incomplete fusion

Velocity spectra were measured for evaporation residues produced in fusion reactions induced by 5-35 MeV/A14N. The results, together with published data for 16O and 20Ne induced fusion, are shown to reveal a projectile dependence of incomplete fusion processes. The data can be qualitatively described in terms of a picture which takes into account the vector addition of the center-of-mass velocities of the interacting nuclei with the intrinsic Fermi velocities of the nucleons

Highly deformed 40^{40}Ca configurations in 28^{28}Si + 12^{12}C

The possible occurrence of highly deformed configurations in the $^{40}$Ca di-nuclear system formed in the $^{28}$Si + $^{12}$C reaction is investigated by analyzing the spectra of emitted light charged particles. Both inclusive and exclusive measurements of the heavy fragments (A $\geq$ 10) and their associated light charged particles (protons and $\alpha$ particles) have been made at the IReS Strasbourg {\sc VIVITRON} Tandem facility at bombarding energies of $E_{lab} (^{28}$Si) = 112 MeV and 180 MeV by using the {\sc ICARE} charged particle multidetector array. The energy spectra, velocity distributions, and both in-plane and out-of-plane angular correlations of light charged particles are compared to statistical-model calculations using a consistent set of parameters with spin-dependent level densities. The analysis suggests the onset of large nuclear deformation in $^{40}$Ca at high spin.Comment: 33 pages, 11 figure

Neutrino Probes of the Nature of Light Dark Matter

Dark matter particles gravitationally trapped inside the Sun may annihilate into Standard Model particles, producing a flux of neutrinos. The prospects of detecting these neutrinos in future multi-\kton{} neutrino detectors designed for other physics searches are explored here. We study the capabilities of a 34/100 \kton{} liquid argon detector and a 100 \kton{} magnetized iron calorimeter detector. These detectors are expected to determine the energy and the direction of the incoming neutrino with unprecedented precision allowing for tests of the dark matter nature at very low dark matter masses, in the range of 5-50 GeV. By suppressing the atmospheric background with angular cuts, these techniques would be sensitive to dark matter - nucleon spin dependent cross sections at the fb level, reaching down to a few ab for the most favorable annihilation channels and detector technology.Comment: Minor changes and clarifications, matches JCAP versio

The Majorana Neutrinoless Double-Beta Decay Experiment

The proposed Majorana double-beta decay experiment is based on an array of segmented intrinsic Ge detectors with a total mass of 500 kg of Ge isotopically enriched to 86% in 76Ge. A discussion is given of background reduction by: material selection, detector segmentation, pulse shape analysis, and electro-formation of copper parts and granularity. Predictions of the experimental sensitivity are given. For an experimental running time of 10 years over the construction and operation of Majorana, a half-life sensitivity of ~4x10^27 y (neutrinoless) is predicted. This corresponds to an effective Majorana mass of the electron neutrino of ~0.03-0.04 eV, according to recent QRPA and RQRPA matrix element calculations.Comment: 10 pages, 7 figure

Implementación de estrategias de marketing para la empresa Importaciones Generales Nieto S. R. L. - 2017

El mercado ferretero del distrito de Nueva Cajamarca (San Martín, Perú) se encuentra en constante crecimiento, ya que cada día se destinan más áreas a la agricultura, siendo esta actividad realizada por el 55% de los pobladores del distrito. Al incrementar las áreas utilizadas para a la agricultura genera mayor demanda de herramientas y equipos para uso agrícola y forestal, generando que nuevas ferreterías inicien sus actividades comerciales. Es por ello que Importaciones Generales Nieto S.R.L. tuvo la necesidad de implementar estrategias para generar la repetición de compra por parte de los consumidores. La investigación tuvo como objetivo la implementación de estrategias generadas por un plan de marketing para lograr la repetición de compra, de esa forma aumentar el volumen de ventas y la participación de mercado. Se realizó un análisis previo de la situación de la empresa, se estudió a profundidad a los competidores, se hizo un estudio detallado del mercado donde se determinó como público objetivo a las personas que se dedican a la agricultura. Se aplicó una encuesta que permitió recolectar datos para elaborar estrategias como merchandising y publicidad; que tuvieron como fin generar un impacto positivo para la empresa. La implementación de estrategias generadas por el plan de márketing tuvo un costo de S/.2,671.25 mensuales. Como resultados por la aplicación de las estrategias fue: Las ventas del mes de noviembre fueron de S/.196,063.18, que respecto a las ventas del mes de noviembre del 2016 que fueron S/.178,869.66 esto representa un crecimiento del 9.6% de ventas mensuales.Tesi

Projected WIMP sensitivity of the LUX-ZEPLIN dark matter experiment

LUX-ZEPLIN (LZ) is a next-generation dark matter direct detection experiment that will operate 4850 feet underground at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, USA. Using a two-phase xenon detector with an active mass of 7 tonnes, LZ will search primarily for low-energy interactions with weakly interacting massive particles (WIMPs), which are hypothesized to make up the dark matter in our galactic halo. In this paper, the projected WIMP sensitivity of LZ is presented based on the latest background estimates and simulations of the detector. For a 1000 live day run using a 5.6-tonne fiducial mass, LZ is projected to exclude at 90% confidence level spin-independent WIMP-nucleon cross sections above 1.4 × 10-48cm2 for a 40 GeV/c2 mass WIMP. Additionally, a 5σ discovery potential is projected, reaching cross sections below the exclusion limits of recent experiments. For spin-dependent WIMP-neutron(-proton) scattering, a sensitivity of 2.3 × 10−43 cm2 (7.1 × 10−42 cm2) for a 40 GeV/c2 mass WIMP is expected. With underground installation well underway, LZ is on track for commissioning at SURF in 2020