Journal Published Online: 01 March 1991
Volume 14, Issue 1

Sample Size for Laboratory Calibration of Subsurface Neutron Moisture Gauges



The estimation of adequate sample size is critical to all laboratory methods of calibration of neutron moisture gauges. Neutron gauge response is a function of the true sample geometry rather than an arbitrarily defined spherical geometry. A two-group solution is obtained for neutron flux in a homogeneous, finite, cylindrical sample. The theoretical flux distributions for this solution and for infinite and spherical samples are compared for three representative media. The results show that significant reductions of sample size are possible for media with low moisture contents if the true cylindrical geometry is considered.

Author Information

Morris, PH
University of Queensland, St. Lucia, Queensland, Australia
Williams, DJ
University of Queensland, St. Lucia, Queensland, Australia
Pages: 7
Price: $25.00
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Stock #: GTJ10193J
ISSN: 0149-6115
DOI: 10.1520/GTJ10193J