Dual-energy neutron tomography of water in rock using the Argonne IPNS Page: 1 of 8
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Dual-Energy
Neutron Tomography of Water in Rock
using the Argonne IPNSANL/CP--76140
nE92 015186E. Rhodes, D. S. Kupperman, and R. L. Hitterrnan
Argonne National Laboratory. 9700 S. Cass Ave., Argonne, IL 60439
Keywords: dual-energy hydrogen tomography, neutron radiography,
tuffaceous rock. intense pulsed neutron source
A BSTRACT
In dual-energy hydrogen imaging, the increase in hydrogen neutron cross-section
at subthermal neutron energies is used to enhance the imaging of small amounts
of hydrogen against a background of other absorbing materials by subtracting a
tomographic image obtained for higher energy neutrons from that obtained for
subthermal neutrons (picking energies such that the other absorbing materials
have nearly the sarre cross-sections at both energies). This technique was used
to provide dual-energy imaging of water in tuffaceous rock. with the goal being
to track water flow through porous rock for site risk analysis of permanent
disposal of radwaste. A feasibility experiment was conducted at the IPNS
facility with coarse spatial resolution, yielding promising results.Submitted to Fourth World Conference on Neutron Radiography
May 11-14, 1992, Hilton Hotel, San Francisco, USA
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Rhodes, E.; Kupperman, D.S. & Hitterman, R.L. Dual-energy neutron tomography of water in rock using the Argonne IPNS, article, July 1, 1992; Illinois. (https://digital.library.unt.edu/ark:/67531/metadc626044/m1/1/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.