Results 1 to 10 of about 1,689 (117)

DNA damage and cell death induced by exposure to ultra-high dose rate low-dose pulsed X-rays emitted from a kilojoule plasma focus device [PDF]

Biological Research
Background FLASH radiotherapy, characterized by ultra-high dose rates (> 40 Gy/s), potentially spares normal tissues while maintaining antitumor efficacy (the FLASH effect).
Héctor Araya, Jalaj Jain, Rodrigo Andaur, José Moreno, Sergio Davis, Pablo Diaz, Ethel Velásquez, Josefa Orellana, Martín Ríos, Jessica Toro, Octavio Orellana-Serradell, Cristopher Fierro, Leopoldo Soto, Katherine Marcelain   +13 more
doaj   +2 more sources

A model for defect formation in materials exposed to radiation

Matter and Radiation at Extremes, 2021
A simple model for the stochastic evolution of defects in a material under irradiation is presented. Using the master-equation formalism, we derive an expression for the average number of defects in terms of the power flux and the exposure time.
Sergio Davis, Felipe González-Cataldo, Gonzalo Gutiérrez, Gonzalo Avaria, Biswajit Bora, Jalaj Jain, José Moreno, Cristian Pavez, Leopoldo Soto   +8 more
doaj   +1 more source

Tailored synthesis of iron oxide nanoparticles for specific applications using a statistical experimental design

Heliyon, 2023
For this work, iron oxide nanoparticles are synthesized by the co-precipitation method with stoichiometric amounts of Fe2+ and Fe3+ salts in a 1:2 ratio in distilled water and the pH is raised by adding an aqueous ammonia solution by controlled dripping.
María José Inestrosa-Izurieta, Diego Vilches, Julio I. Urzúa   +2 more
doaj   +1 more source

Bayesian inference of spectrometric data and validation with numerical simulations of plasma sheath diagnostics of a plasma focus discharge

Scientific Reports, 2022
Plasma Foci are pulsed coaxial discharges with numerous radiation applications and interesting scientific phenomena. Although the physics answered much of the processes involved in these discharges, many related fundamental questions still remains ...
Gonzalo Avaria, Alejandro Clausse, Sergio Davis, Cristian Pavez, Nelson Villalba, Osvaldo Cuadrado, Jose Moreno, H. Marcelo Ruiz, Leopoldo Soto   +8 more
doaj   +1 more source

Diseño y simulación de un sistema de automatización del proceso de producción y fraccionamiento de 131i, utilizando estrategias de control avanzado

Brazilian Journal of Radiation Sciences, 2014
En este reporte se presentan los resultados obtenidos en el diseño y simulación de un sistema de control utilizando estrategias avanzadas en una celda de producción en la Planta de Producción de Radioisótopos del IPEN.
José Páez, Pablo Arias, Jesús Miranda
doaj   +1 more source

Acceptance testing of a CT scanner with a knowledge-based iterative reconstruction algorithm

Brazilian Journal of Radiation Sciences, 2019
Implementation of efficient computed tomography (CT) detectors, automatic exposure control and iterative reconstruction algorithms allows to obtain high quality images while minimizing absorbed dose to the patients, in consonance with the ALARA ...
Maryangel Jhoseline Medina, Francisco Javier Funes, Aley Palau, Vanesa María Sanz, Amilcar Remigio Osorio, Mauro Namías   +5 more
doaj   +1 more source

Development of an automatic tool for dose management in digital mammography

Brazilian Journal of Radiation Sciences, 2019
INTRODUCTION: Digital mammography units usually record the entrance surface exposure (ESE) and the average glandular dose (AGD) received by the patient for each exposure.
Maryangel Jhoseline Medina, Francisco Javier Funes, Vanesa Maria Sanz, Aley Palau, Mauro Namías   +4 more
doaj   +1 more source

Caracterización de Haces de Rayos X por el Método de Atenuación para la Calibración de Dosímetros Personales

Revista de Investigación de Física, 1999
En el Laboratorio de Calibraciones y Dosimetría del IPEN se ha empleado el méodo de atenuación para caracterizar los haces de rayos X utilizados en la calibración de dosímetros personales.
T. Benavente, J. Márquez, J. Santa Cruz
doaj   +1 more source

OpenMC(TD): Current status and next development stages [PDF]

EPJ Web of Conferences
This work presents the current state and the next stages in the development of the modified code OpenMC(TD), a modified version of the Monte Carlo code OpenMC which includes the time dependence related to the emission of β-delayed neutrons, but instead ...
Romero-Barrientos Jaime, Molina Francisco, Zambra Marcelo, López-Usquiano Franco   +3 more
doaj   +1 more source

Ti film deposition process of a plasma focus: Study by an experimental design

AIP Advances, 2017
The plasma generated by plasma focus (PF) devices have substantially different physical characteristics from another plasma, energetic ions and electrons, compared with conventional plasma devices used for plasma nanofabrication, offering new and unique ...
M. J. Inestrosa-Izurieta, J. Moreno, S. Davis, L. Soto   +3 more
doaj   +1 more source