EPA Science Inventory

THERMAL NEUTRON INTENSITIES IN SOILS IRRADIATED BY FAST NEUTRONS FROM POINT SOURCES. (R825549C054)

Citation:

Shue, S. L., R. E. Faw, AND J. K. Shultis. THERMAL NEUTRON INTENSITIES IN SOILS IRRADIATED BY FAST NEUTRONS FROM POINT SOURCES. (R825549C054). CHEMICAL ENGINEERING SCIENCE. American Chemical Society, Washington, DC, 144:47-61, (1998).

Description:

Thermal-neutron fluences in soil are reported for selected fast-neutron sources, selected soil types, and selected irradiation geometries. Sources include 14 MeV neutrons from accelerators, neutrons from spontaneously fissioning 252Cf, and neutrons produced from alpha-particle interactions in the 241Am/Be source. Soils are of five types, ranging from a dry porous soil to a wet dense soil. Neutron fluences are reported for sources above the soil surface and positioned at selected depths below the soil surface. Methods are demonstrated for incorporating thermal-neutron fluence data into the deconvolution of capture gamma-ray spectral data in the method of assessing soil contamination using prompt gamma-ray neutron activation analysis.

Author Keywords: Thermal-neutron intensities; Irradiation geometry; Soil type; gamma-ray neutron activation analysis

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Start Date: 01/01/1998
Completion Date: 01/01/1998
Record Last Revised: 12/22/2005
Record Created: 10/30/2003
Record Released: 10/30/2003
Record ID: 69991

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL CENTER FOR ENVIRONMENTAL RESEARCH