Results 31 to 40 of about 691 (166)

Response characteristics and interference evaluation of RAD7 radon measurement within 50,000 ppm CO

Nuclear Engineering and Technology
RAD7 is a core instrument for geological onsite radon measurements. When measuring the exhalation rate of radon from surface soil using closed accumulation chambers, concurrently exhaled carbon dioxide accumulates within the chamber. Similarly, during in-
Yilin Deng, Ruomei Xie, Zhongkai Fan, Jiaxin Li, Jiale Cheng, Yehe Zhou, Xiangming Wu, Haoyu You, Yuyang Lu, Hongzhi Yuan, Yanliang Tan   +10 more
doaj   +1 more source

The Approach and Device for Water Radon Measurement with Overflowing Electret

Journal of Isotopes, 2016
To solve the difficulties in “original” radon concentration measuring, this paper proposed an overflow type electret radon concentration measurement method and device.
ZHANG Hui1;DENG Jun2;XU Le-chang1;LI Xian-jie1
doaj   +1 more source

Indoor Radon Concentrations Measurements for Selected Dwellings in Some Baghdad Districts – Iraq

Al-Mustansiriyah Journal of Science, 2019
In this work, measurements of indoor radon concentrations were completed for selected dwellings in Baghdad governorate using DURRIDGE RAD7 detector. The spectra measured by this detector demonstrated that, the radon concentrations were changed from 89 Bq/
firas hashem ahmed, Waleed Jabbar Mhana, Saja Faez Hassan, Hazim Louis Mansour   +3 more
doaj   +1 more source

Correction of the radon exhalation rate using the Kalman filtering to reduce measurement errors

Nuclear Engineering and Technology
The RAD7 detector is widely used for measuring the radon exhalation rate from the surfaces of media such as soil, rocks, and building materials. However, during the measurement process, the accuracy of the results is prone to interference due to the ...
Haoyu You, Jianfeng Tang, Zhongkai Fan, Ruomei Xie, Hongzhi Yuan, Yanliang Tan   +5 more
doaj   +1 more source

Measurement of Radon Exhalation Rate from Pottery Meal Dishes in Erbil City by using Passive and Active Techniques [PDF]

Kirkuk Journal of Science, 2012
Solid State Nuclear Track Detectors (SSNTDs) of type CR-39 has been used in this study as a passive method to measure the radon activity concentration, radon exhalation rate (in terms of area and mass), and effective radon content in the pottery meal ...
Salih O. Haji, Ali H. Ahmed
doaj   +1 more source

Radon‐222 as an Effective Tracer to Distinguish Groundwater Circulation Patterns in the Deep Fault‐Controlled Geothermal System

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract Groundwater flow regulated by deep faults remains challenging to trace due to structural complexity. This study applies the noble gas tracer 222Rn combined with hydrochemistry and stable isotopes (δ2H, δ18O) to distinguish circulation patterns of geothermal springs along a major fault in the Tibetan Plateau.
Xiaoyan Shi, Xingxing Kuang, Meizhuang Zhu, Linfeng Fan, Xinkang Wang, Gexi Zheng, Yinlei Hao, Chunmiao Zheng   +7 more
wiley   +1 more source

Using Radon (222Rn) to Trace Variability in Greenhouse Gas Emission From Tree Stems Across Species, Seasons and Stem Heights

Ecohydrology, Volume 19, Issue 3, April/May 2026.
ABSTRACT Emissions from trees are an important component of the global methane (CH4) cycle, but their spatial origins (soil vs. in‐stem), transport pathways and environmental influences are not well constrained. To address these issues, this field study characterized spatial and temporal variability in stem emissions of biologically inert radon (222Rn),
Glory A. Iorliam, Kevan B. Moffett, Amr E. Keshta, J. Patrick Megonigal, Karen L. Knee   +4 more
wiley   +1 more source

Comparative analysis of factors influencing the measurements of DDL-2 and RAD7 radon monitors

地震科学进展
Based on the parallel observational data from the DDL-2 and RAD7 radon monitors at well Anguo-1 in Pingliang, Gansu Province, this study systematically analyzes the influence of different sampling methods on DDL-2 instrument measurements by integrating ...
Yuxia Yao, Xiaojuan Wang, Chunyan Fan, Xuyan Zhang, Zaipeng Miao, Kang Wang, Bingyu Qian   +6 more
doaj   +1 more source

Seasonal and Geologic Controls on Submarine Groundwater Discharge‐Derived Nutrient Fluxes to Two Coastal Embayments

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 4, April 2026.
Abstract Submarine groundwater discharge and porewater exchange are critical but often overlooked sources of nutrients to coastal systems. This study investigates how sediment permeability and summer‐winter seasonal dynamics influence the magnitude and biogeochemistry of nutrient fluxes from submarine groundwater discharge and porewater exchange ...
Moira Taylor, Joseph J. Tamborski, Aaron Alorda‐Kleinglass, Nathaniel Maynard   +3 more
wiley   +1 more source

Carbon Cycle Succession Across a Permafrost Thaw Gradient in Northeastern Alberta as Revealed by δ13C in Dissolved Solids, Gases, and Particulates in Lakes

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 2, February 2026.
Abstract δ13C in particulate organic carbon (POC), dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), carbon dioxide (CO2(g)) and methane (CH4(g)), together with geochemical modeling, were applied to describe carbon cycle evolution in 40 boreal lakes situated across a permafrost thaw gradient in northeastern Alberta, Canada, where ...
J. J. Gibson, P. Eby, A. Jaggi
wiley   +1 more source