99 research outputs found
Nuclear emulsion with molybdenum filling for observation of decay
The usage of nuclear emulsion with molybdenum filling for observation of
decay are shown to be possible. Estimates for 1 kg of Mo
with zero background give the sensitivity for the decay of
Mo at the level of y for 1 year of measurement.Comment: 7 pages, 3 figure
New Results for Double-Beta Decay of Mo-100 to Excited Final States of Ru-100 Using the TUNL-ITEP Apparatus
The coincidence detection efficiency of the TUNL--ITEP apparatus designed for
measuring half-life times of two-neutrino double-beta decay transitions to
excited final states in daughter nuclei has been measured with a factor of 2.4
improved accuracy. In addition, the previous measuring time of 455 days for the
study of the Mo-100 two-neutrino double-beta decay to the first excited 0+
state in Ru-100 has been increased by 450 days, and a new result (combined with
the previous measurement obtained with the same apparatus) for this transition
is presented: T_(1/2) = [5.5 (+1.2/-0.8) (stat) +/- 0.3 (syst)] x 10^20 y.
Measured two-neutrino double-beta decay half-life times to excited states can
be used to test the reliability of nuclear matrix element calculations needed
for determining the effective neutrino mass from zero-neutrino double-beta
decay data. We also present new limits for transitions to higher excited states
in Ru-100 which, if improved, may be of interest for more exotic conjectures,
like a bosonic component to neutrino statistics
Spectral modeling of scintillator for the NEMO-3 and SuperNEMO detectors
We have constructed a GEANT4-based detailed software model of photon
transport in plastic scintillator blocks and have used it to study the NEMO-3
and SuperNEMO calorimeters employed in experiments designed to search for
neutrinoless double beta decay. We compare our simulations to measurements
using conversion electrons from a calibration source of and show
that the agreement is improved if wavelength-dependent properties of the
calorimeter are taken into account. In this article, we briefly describe our
modeling approach and results of our studies.Comment: 16 pages, 10 figure
Technical design and performance of the NEMO3 detector
The development of the NEMO3 detector, which is now running in the Frejus
Underground Laboratory (L.S.M. Laboratoire Souterrain de Modane), was begun
more than ten years ago. The NEMO3 detector uses a tracking-calorimeter
technique in order to investigate double beta decay processes for several
isotopes. The technical description of the detector is followed by the
presentation of its performance.Comment: Preprint submitted to Nucl. Instrum. Methods A Corresponding author:
Corinne Augier ([email protected]
Results of the BiPo-1 prototype for radiopurity measurements for the SuperNEMO double beta decay source foils
The development of BiPo detectors is dedicated to the measurement of
extremely high radiopurity in Tl and Bi for the SuperNEMO
double beta decay source foils. A modular prototype, called BiPo-1, with 0.8
of sensitive surface area, has been running in the Modane Underground
Laboratory since February, 2008. The goal of BiPo-1 is to measure the different
components of the background and in particular the surface radiopurity of the
plastic scintillators that make up the detector. The first phase of data
collection has been dedicated to the measurement of the radiopurity in
Tl. After more than one year of background measurement, a surface
activity of the scintillators of (Tl) 1.5
Bq/m is reported here. Given this level of background, a larger BiPo
detector having 12 m of active surface area, is able to qualify the
radiopurity of the SuperNEMO selenium double beta decay foils with the required
sensitivity of (Tl) 2 Bq/kg (90% C.L.) with a six
month measurement.Comment: 24 pages, submitted to N.I.M.
Probing New Physics Models of Neutrinoless Double Beta Decay with SuperNEMO
The possibility to probe new physics scenarios of light Majorana neutrino
exchange and right-handed currents at the planned next generation neutrinoless
double beta decay experiment SuperNEMO is discussed. Its ability to study
different isotopes and track the outgoing electrons provides the means to
discriminate different underlying mechanisms for the neutrinoless double beta
decay by measuring the decay half-life and the electron angular and energy
distributions.Comment: 17 pages, 14 figures, to be published in E.P.J.
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
New limits on the decay of to excited states of
Experimental limits on half-lives of
the decay of Te to excited
states of Xe are obtained using low-background HPGe detectors.
At the 90% CL, these limits are equal to y,
y
and y for transitions to the , and
levels, respectively
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