Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL094281 |
The footprint characteristics of cosmic ray thermal neutrons | |
J. Jakobi; J. A. Huisman; M. Kö; hli; D. Rasche; H. Vereecken; H. R. Bogena | |
2021-07-30 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | The advance of the cosmic ray neutron (CRN) sensing method for estimating field scale soil moisture relied largely on simulations of the footprint properties of epithermal neutrons (∼0.5 eV – 100 keV). Commercially available CRN probes are usually additionally equipped with a thermal neutron (< 0.5 eV) detector. The potential of these measurements is rarely explored because relevant features of thermal neutrons, such as the footprint and the sensitivity to soil moisture are unknown. Here, we used neutron transport modeling and a river crossing experiment to assess the thermal neutron footprint. We found that the horizontal thermal neutron footprint ranges between 43 and 48 m distance from the probe and that the vertical footprint extends to soil depths between 10 and 65 cm depending on soil moisture. Furthermore, we derived weighting functions that quantify the footprint characteristics of thermal neutrons. These results will enable new applications of thermal neutrons. This article is protected by copyright. All rights reserved. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/335338 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | J. Jakobi,J. A. Huisman,M. Kö,et al. The footprint characteristics of cosmic ray thermal neutrons[J]. Geophysical Research Letters,2021. |
APA | J. Jakobi.,J. A. Huisman.,M. Kö.,hli.,D. Rasche.,...&H. R. Bogena.(2021).The footprint characteristics of cosmic ray thermal neutrons.Geophysical Research Letters. |
MLA | J. Jakobi,et al."The footprint characteristics of cosmic ray thermal neutrons".Geophysical Research Letters (2021). |
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