Jung’s Theorem Applied in Nuclear Track Methodology

 

• G. ChacinSimon Bolivar University. Physics Department. Caracas 1080A Venezuela
• L. Sajo-BohusSimon Bolivar University. Physics Department. Caracas 1080A Venezuela
• J.J. Rojas HanccoDepartment of Physics, Pontifical Catholic University of Peru, Lima, Peru
• G. EspinosaInstitute of Physics, National Autonomous University of Mexico (UNAM), 04520 Mexico City

DOI: https://doi.org/10.15415/jnp.2018.61008

Keywords: Nuclear track density, cr-39 detectors, beam diagnostics, charged particle sources

Abstract

Nuclear track density provides accelerator beam imaging and diagnostic employing CR-39 passive detectors. Counting charged particles related tracks by automated reading systems depend on the accuracy of microscope field view other that chemical etching procedure and frequency of overlapped tracks. The study, to propose a method to determined track density for analyser optical field view not calibrated. The approach Jungs’ theorem, provides the area value based on the maximum distance for two selected etched tracks. Results show that the new method has its importance when microscope field view calibration is not available with precision for accelerator beam diagnostics.

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Issue

Vol 6 No 1 (2018)

How to Cite

G. Chacin; L. Sajo-Bohus; J.J. Rojas Hancco; G. Espinosa. Jung’s Theorem Applied in Nuclear Track Methodology. J. Nucl. Phy. Mat. Sci. Rad. A. 2018, 6, 51-55.

Temperature Effects in the Composition of Metal Halide Perovskite thin Films

 

• M. Castro-ColinBruker AXS, Karlsruhe, Germany
• L. BanuelosDept. of Physics, U. of Texas at El Paso, El Paso, TX, USA
• C. Diaz-MorenoDept. of Physics, U. of Texas at El Paso, El Paso, TX, USA
• D. HodgesElectrical and Computer Eng. Dept., U. of Texas at El Paso, El Paso, TX, USA
• E. Ramirez-HomsDept. of Physics, U. of Texas at El Paso, El Paso, TX, USA
• D. KorolkovBruker AXS, Karlsruhe, Germany
• N. SharminDept. of Physics, U. of Texas at El Paso, El Paso, TX, USA
• J. A. LopezDept. of Physics, U. of Texas at El Paso, El Paso, TX, USA

DOI: https://doi.org/10.15415/jnp.2018.61007

Keywords: Perovskites, Photovoltaic, Energy Conversion, X-ray Reflectivity, X-ray Fluorescence

Abstract

Metal halide perovskites have shown to be a structure with great promise as an efficient photovoltaic, but at the same time it is affected by instability problems that degrade their performance. Degradation mechanisms vary with temperature, moisture, oxidation, and energy conversion during light exposure. We study performance loss due to temperature by probing diffusion of elemental composition across the thickness of films produced by spin coating and for temperatures ranging from 20 to 200°C. X-ray reflectivity was used to identify the electron density, composition, and quality of the films, aided with X-ray fluorescence and X-ray photoelectron spectroscopy studies to obtain information about degradation of the organic phase of the films.

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Issue

Vol 6 No 1 (2018)

How to Cite

M. Castro-Colin; L. Banuelos; C. Diaz-Moreno; D. Hodges; E. Ramirez-Homs; D. Korolkov; N. Sharmin; J. A. Lopez. Temperature Effects in the Composition of Metal Halide Perovskite Thin Films. J. Nucl. Phy. Mat. Sci. Rad. A. 2018, 6, 39-49.

Annihilation of Dipolar Dark Matter: χχ→γγ

 

• E. Barradas-GuevaraFaculty of Physical Mathematical Sciences, Meritorious Autonomous University of Puebla (BUAP), PO Box 1152, Puebla 72000, Mexico
• J. L. Díaz-CruzFaculty of Physical Mathematical Sciences, Meritorious Autonomous University of Puebla (BUAP), PO Box 1152, Puebla 72000, Mexico
• O. G. Félix BeltránFaculty of Electronics Sciences, Meritorious Autonomous University of Puebla (BUAP), PO Box 542, Puebla 72000, Mexico
• C. Arellano CelizFaculty of Physical Mathematical Sciences, Meritorious Autonomous University of Puebla (BUAP), PO Box 1152, Puebla 72000, Mexico

DOI: https://doi.org/10.15415/jnp.2018.61006

Keywords: dark matter annihilation, dipolar dark matter, gamma-ray signatures, annihilation cross section, relic density

Abstract

In this work we study the annihilation of dark matter, considering it as a neutral particle with magnetic and/or electric moments not null. The calculation of the effective section of the process χχbar→γγ is made starting from a general form of coupling χ χbar γ in the framework of an extension of the Standard Model. We found, when taking into account an annihilation of DDM-antiDDM to monoenergetic photons, that for small masses, mχ ≤ 0 GeV, an electric dipole moment ~10–6 e cm is required to satisfy the current residual density, while for the range of greater sensitivity of HAWC, 10 TeV < Eg < 20 TeV, the electrical dipole moment must be of the order of 10–8 e cm.

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Issue

Vol 6 No 1 (2018)

How to Cite

E. Barradas-Guevara; J. L. Díaz-Cruz; O. G. Félix Beltrán; C. Arellano Celiz. Annihilation of Dipolar Dark Matter: χχ→γγ. J. Nucl. Phy. Mat. Sci. Rad. A. 2018, 6, 33-38.

Dependence on the Identification of the Scale Energy Parameter Q 2 in the Quark Distribution Functions for a DIS Production of Za

 

• M. Gómez-BockInstitute of Physics, Meritorious Autonomous University of Puebla (BUAP), PO Box J-48, 52570 Puebla, Mexico.
• W. GonzalezInstitute of Physics, Meritorious Autonomous University of Puebla (BUAP), PO Box J-48, 52570 Puebla, Mexico.
• L. López LozanoAcademic area of Mathematics and Physics. Hidalgo State Autonomous University. Kilometer 4.5 Pachuca-Tulancingo highway. 42184 Pachuca, Hidalgo. México.
• S. Rosado-NavarroFaculty of Physical Mathematical Sciences, Meritorious Autonomous University of Puebla (BUAP), PO Box 1364, 72000 Puebla, Mexico.
• A. RosadoInstitute of Physics, Meritorious Autonomous University of Puebla (BUAP), PO Box J-48, 52570 Puebla, Mexico.

DOI: https://doi.org/10.15415/jnp.2018.61005

Keywords: Bosonic Production, Deep inelastic scattering, Momentum Transferred, Parton Distribution Function, Parton Model

Abstract

We discuss the Z-production in a DIS (Deep Inelastic Scattering) process e + p → e + Z + X using the Parton Model, within the context of the Standard Model. In contrast with deep inelastic eP-scattering (e + p → e + X), where the choice of Q2, as the transferred momentum squared, is unambiguous; whereas in the case of boson production, the transferred momentum squared, at quark level, depends on the reaction mechanism (where is the EW interaction taking place). We suggest a proposal based on the kinematics of the process considered and the usual criterion for Q2, which leads to a simple and practical prescription to calculate Z-production via ep-DIS. We also introduce different options in order o perform the convolution of the Parton distribution functions (PDFs) and the scattering amplitude of the quark processes. Our aim in this work is to analyze and show how large could be the dependence of the total cross-section rates on different possible prescriptions used for the identification of the scale energy parameter Q2. We present results for the total cross-section as a function of the total energy √s of the system ep, in the range 300 <√s ≤ 1300 GeV.

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Issue

Vol 6 No 1 (2018)

How to Cite

M. Gómez-Bock; W. Gonzalez; L. López Lozano; S. Rosado-Navarro; A. Rosado. Dependence on the Identification of the Scale Energy Parameter Q 2 in the Quark Distribution Functions for a DIS Production of Za. J. Nucl. Phy. Mat. Sci. Rad. A. 2018, 6, 27-32.

Signal of h → µτ, ττ in ν2HDM⊕S3

 

• E Barradas GuevaraFaculty of Physical Mathematical Sciences, Meritorious Autonomous University of Puebla (BUAP), PO Box 1152, Puebla 72000, Mexico
• F. Cazarez-BushInstitute of Mathematics, National Autonomous University of Mexico (UNAM), PO Box 139-B 6219, 04510 Mexico City. Mexico
• O. Felix Beltran5Faculty of Electronics Sciences, Meritorious Autonomous University of Puebla (BUAP), PO Box 542, Puebla 72000, Mexico
• F. Gonzalez-CanalesInstitute of Mathematics, National Autonomous University of Mexico (UNAM), PO Box 139-B 6219, 04510 Mexico City. Mexico

DOI: https://doi.org/10.15415/jnp.2018.61004

Keywords: Leptons, Seesaw mechanism, flavour symmetry, 2HDM-III

Abstract

Nowadays in particle physics, the exploration of the flavor physics through the Higgs boson phenomenology is one of the main goals in the field. In particular we are interested in the Lepton Flavour Violation (LFV) processes. In this work, we explore the processes h → µτ, ττ in the theoretical framework of a flavored extension of the Standard Model, which has two Higgs fields and the horizontal permutation symmetry S3 imposed in the Yukawa sector, this extension is called v2HDM⊗S3.We obtain the couplings Φµτ, ττ as well as Br(h → µτ) in function of the model parameters in function of the model parameters, which are constricted by means the experimental results of  ΦMS → µτ reported in the literature.

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Issue

Vol 6 No 1 (2018)

How to Cite

E Barradas Guevara; F. Cazarez-Bush; O. Felix Beltran; F. Gonzalez-Canales. Signal of H → µτ, ττ in ν2HDM⊕S3. J. Nucl. Phy. Mat. Sci. Rad. A. 2018, 6, 23-26.