Radon exhalation rate is the of radioactive radon gas that escapes from soil into atmosphere. In this study was measured for 33 samples soil, in four districts Duhok province, using two different techniques: one concentration and other radium content, by both alpha gamma spectroscopy. For measurement, alpha-sensitive RAD7 detector used. While second method, expressed as a function concentration...

BACKGROUND Ventilator exhalation-valve performance during the expiratory phase has been studied in depth. An active exhalation valve uses servo-control technology that allows gas to be released from the exhalation valve during the inspiratory phase if the patient makes an expiratory effort. We conducted a bench study of active exhalation valve response to expiratory effort during the inspirator...

One of the aims of the First Intercomparison on Natural Radioactivity Under Field Conditions was to test different instruments and detectors for the measurement of radon gas and external gamma radiation (dose rate) in filed conditions, where the levels of natural radiation are quite high. The event was organized by the Radon group of University of Cantabria, (Spain) LaRUC, and was held in the e...

abstract background: the radiological impact of the use of phosphate fertilizers in soil is due to the internal irradiation of the lung by the alpha particles, short lived radon-thoron progeny and the external irradiation of the body by gamma rays emitted from radionuclides in situ. this paper describes the results of gamma spectrometric measurements of the concentration of the natural radionuc...

Abstract The present work deals with radon pollution arising from granitic rocks using an Alpha Guard monitor. Forty-four samples were collected five sites located in the Central part of Eastern Desert Egypt. minimum to maximum concentration for Gebel (mountain) El-Missikat MS, El-Gidamy GD, RieEl-Garra RG, El-Aradiya AR, and Kab-Amira KA 49,597 ± 8773 236,029 22,397 Bq m −3 , 39,658 8341 188,6...