World Library  
Flag as Inappropriate
Email this Article

Neutron probe

Article Id: WHEBN0001826330
Reproduction Date:

Title: Neutron probe  
Author: World Heritage Encyclopedia
Language: English
Subject: Neutron, Frequency domain sensor, Irrigation scheduling, Soil physics, Outline of hydrology
Collection: Neutron, Soil Physics
Publisher: World Heritage Encyclopedia

Neutron probe

Neutron probe (e=neutron emitter -- d=detector -- b=shielding -- c=counter).

A neutron probe is a device used to measure the quantity of water present in soil.

A typical neutron probe contains a pellet of americium-241 and beryllium. The alpha particles emitted by the decay of the americium collide with the light beryllium nuclei, producing fast neutrons. When these fast neutrons collide with hydrogen nuclei present in the soil being studied, they lose much of their energy. The detection of slow neutrons returning to the probe allows an estimate of the amount of hydrogen present. Since water contains two atoms of hydrogen per molecule, this therefore gives a measure of soil moisture.

Farmers use this to determine how much water is in their fields.

See also


  • : Google Translate: "Establishment of soil moisture measurement points, calibration of a neutron probe at the instance of the type Wallingfordsonde iH11"

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.