23 articles in this issue
Randall L. Holliday, Joshua M. Young, Satyabrata Singh, Floyd D. McDaniel, Bibhudutta Rout
By increasing the Sn concentration in Ge1-ySny and Ge1-x-ySixSny systems, these materials can be tuned from indirect to direct bandgap along with increasing electronic and photonic properties. Efforts have been made to synthesize Sn-Ge and Ge-Si-Sn struct... see more
J Miranda
The emission of characteristic X-rays induced by proton impact is a phenomenon known since the first half of the 20th century. Its more widely known application is the analytical technique Particle Induced X-ray Emission (PIXE). Several models have been d... see more
A L Meléndez-López, M F García-Hurtado, J Cruz-Castañeda, A Negrón-Mendoza, S Ramos-Bernal, A Heredia
This work aims to evaluate a dosimetric system composed of green malachite supported in agarose. Previous work showed that solutions of green malachite irradiated at 1 to 40 kGy present a linear behavior. This system is a gel composed of green malachite (... see more
Laura Patricia Cruz-Cruz, Alicia Negrón-Mendoza, Alejandro Heredia-Barbero
The stability of biologically important molecules, such as amino acids, being subjected to highradiation fields is relevant for chemical evolution studies. Bodies of water were very important in the primitive Earth. In these bodies, the presence of dissol... see more
A. Lima Flores, R. Palomino-Merino, V.M. Castano, G. Espinosa
Radon gas is recognized by international organizations such as the United States Environmental Protection Agency (US-EPA) as the main contributor of radiation environmental to which human beings are exposed. Therefore, the evaluation of indoor radon conce... see more
R. C Acosta-Fernández, A. Heredia-Barbero, A. Negrón-Mendoza
Chemical evolution studies focus on the synthesis and stability of organic molecules during various transformative physicochemical processes. Gaining insight into the possible mechanisms behind these processes requires the use of various energy sources an... see more
E. Islas-Ortiz, E. O. Reyes-Salas, A. Negrón-Mendoza, A. L. Meléndez-López, G. Reyes-García, J. A. Cruz- Castañeda, E. Madrigal-Lagunas
In this study, remnants concentrations of curcumin in Curcuma longa (organic turmeric powder) were determined after it was exposed to irradiation doses of 1, 2 and 3 kGy. Curcumin analysis was performed using the analyte-sensitive impulse differential pol... see more
M. Cinausero, A. M. Sajo-Castelli, L. Sajo-Bohus, J. Palfalvi, G. Espinosa
Passive nuclear track methodology (NTM) is applied to study charged particles products of the reaction 7Li+Pb at ~ 31 MeV. It is a contribution to the 8pLP Project (LNL-INFN-Italy) in where we show an alternative approach to register charged particle from... see more
Ana Leonor Rivera, Sergio Ramos-Beltran, Alicia Negrón-Mendoza
An approach to studying the formation of critical bio-organic compounds in the early Earth is to simulate in the laboratory possible processes that may occur in primitive scenarios. In this context, it can be studied the evolution of succinic acid in an a... see more
E. Prieto, L. X. Hallado, A. Guerrero, I. Álvarez, C. Cisneros
Time of flight laser photoionization has been used to study the response of some molecules of biological interest under laser radiation. One of the questions of great interest today is the effect of radiation on DNA and RNA molecules. Damage to these mole... see more
M. Castro-Colin, E. Ramirez-Homs, J. A. López
Hierarchical clustering was used to identify elemental signatures in artifacts attributed to the Pueblo peoples. The artifacts in this study are pottery samples found at different sites in the state of New Mexico, USA. Three methods were applied: complete... see more
María Guadalupe Torres-Duque, Claudia Camargo-Raya, Alicia Negrón-Mendoza, Sergio Ramos-Bernal
A combination of geochemical variables is necessary to explain the origin of life on Earth. Thus, in this work the sorption of Poly-A on a clay mineral (kaolinite) was studied to get an insight about the sorption capacity at different times and pH values,... see more
K. de los Ríos, C. Méndez-García, L. Acosta, R. García-Martínez, M. A. Martínez-Carrillo, M. E. Ortiz
The meteoric cosmogenic beryllium has been used as an essential geophysical tracer in the analysis of atmospheric flows and erosion soils since 1960. The first measurements Be-7 and Be-10 concentrations in rainwater from Mexico, have been carried out by u... see more
C. Arellano-Celiz, A. Avilez-López, J. E. Barradas-Guevara, O. Félix-Beltrán, F. González-Canales
We are interested in the purpose of a dipolar fermionic particle as a viable candidate of Dark Matter (DDM). Then, we study the annihilation of dark matter into photons, considering it as a neutral particle with non-vanishing magnetic (M) and electric (D)... see more
E. Márquez-Quintos, E. Moreno-Barbosa, J. E. Espinosa, Benito de Celis Alonso, Margarita Amaro Aranda, R. Palomino Merino
There are several types of gamma radiation detectors, which have different characteristics depending on its use. We designed and instrumented a gamma detector for low energies of a small and portable size to obtain spectrum from radioactive sources and fr... see more
T. A. Valencia-Pérez, J. M. Hernández-López, E. Moreno-Barbosa, B. de Celis-Alonso
In medicine, the acquisition process in Computed Tomography Images (CT) is obtained by a reconstruction algorithm. The classical method for image reconstruction is the Filtered Back Projection (FBP). This method is fast and simple but does not use any sta... see more
R. S. Monzamodeth, B. Campillo
An exhaustive study of the erosion process of a copper cathode exposed to a hot plasma column of 2kJ of energy (T˜0.5-2.0keV) and high electron density (n˜1019-1022cm3) was made, as well as, the radiation field of charged and neutral particles. The charac... see more
Abdiel Ramírez Reyes, Gerardo Herrera Corral, Elsa Ordoñez Casanova, Héctor Alejandro Trejo Mandujano, Uzziel Caldiño Herrera
Digital X-ray detectors are required in different sciences and applications, however many high quality devices are expensive although high-resolution images are not always required. We present an easy way to build a detector capable of forming X-ray digit... see more
C. Peña-Negrete, M.A. Fuentes-Acosta, J. Mulia, L.A. Mandujano-Rosas, D. Osorio-González
Rotavirus diarrhea is an infectious intestinal disease that causes about 215 thousand deaths annually in infants under five years old. This virus is formed by three layers of concentric proteins that envelop its genome, from which VP6 structural protein i... see more
A. Ángeles, E. Quintero, I. Gaso, C. P. Zepeda, T. Palma, P. V. Rojas
To assess the quality of drinking water in respect to the content of radioactivity, usually is carried out an screening program in the locations of interest, that program consist in pick representative samples of drinking water from the wells in that loca... see more
A. H. Ramírez, O. Talavera, S. Souto, J. I. Golzarri, G. Espinosa
In this work the determination of radon gas (222Rn) and the characterization of chemical elements in drinking water of the city Taxco was carried out. Ingesting or inhaling a small number of radionuclides, as well as water of poor chemical quality, can be... see more
M. Caldera-Villalobos, B. Leal-Acevedo, V.M. Velázquez-Aguilar, M. D. P. Carreón-Castro
Graft polymerization induced by ionizing radiation is a powerful tool in materials science to modifying the physical properties of polymers. Chitosan is a biocompatible, biodegradable, antibacterial, and highly hydrophilic polysaccharide. In this work, we... see more
J A López, S S Romero González, O Hernández Rodríguez, J Holmes, R Alarcón
Proton beam therapy uses high-energy protons to destroy cancer cells which are still uncertain about where in the body they hit. A possible way to answer this question is to detect the gamma rays produced during the irradiation and determine where in the ... see more