Determining soil contamination profiles from intensities of capture-gamma rays using above-surface neutron sources

Autor:	F. Khan, Richard E. Faw, J. Kenneth Shultis, B. Letellier
Rok vydání:	2001
Předmět:	Neutrons Photons Radiation Photon Chemistry Gamma ray Analytical chemistry Maximum entropy method Neutron Activation Analysis Soil surface Models Theoretical Soil contamination Physics::Geophysics Computational physics Gamma Rays Soil Pollutants Radioactive Neutron source Irradiation
Zdroj:	Applied Radiation and Isotopes. 54:565-583
ISSN:	0969-8043
DOI:	10.1016/s0969-8043(00)00331-6
Popis:	Four methods are presented to estimate contaminant concentration profiles in soil from the intensities of neutron-induced capture-gamma photon intensities measured at the soil surface. In particular, the method of linear regularization with and without an iterative positivity constraint, the Backus–Gilbert method, and the maximum entropy method are applied to the soil contamination problem. Example results obtained with the four methods are given for photon intensities calculated for idealized test contaminant profiles in soil irradiated by neutron sources above the surface.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a9ec34e2999853b821b2b00cbe0fed9 https://doi.org/10.1016/s0969-8043(00)00331-6 Zobrazit plný text záznamu Full Text from ScienceDirect