The Footprint Characteristics of Cosmic Ray Thermal Neutrons

The advance of the cosmic ray neutron (CRN) sensing method for estimating field scale soil moisture relied largely on simulations footprint properties epithermal neutrons (∼0.5 eV–100 keV). Commercially available CRN probes are usually additionally equipped with a thermal (<0.5 eV) detector. potential these measurements is rarely explored because relevant features neutrons, such as and sensitivity to unknown. Here, we used transport modeling river crossing experiment assess footprint. We found that horizontal ranges between 43 48 m distance from probe vertical extends depths 10 65 cm depending moisture. Furthermore, derived weighting functions quantify characteristics neutrons. These results will enable new applications