Method of measuring the density of a material

Details Method of measuring the density of a material Method of measuring the density of a material

1983-03-21

1986-04-15

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

With means to inspect passive solid objects

250391, G01N 924, G01N 2300

Patent

active

045829918

ABSTRACT:
A method of measuring the density of a first material containing a moderator of fast neutrons comprising the steps of: emitting fast neutrons into a sample having a predetermined volume confined in a predetermined shape and sensing the rate of slow neutrons emerging from the sample for each of a plurality of samples of a second material, each of the plurality of samples of the second material having a different known density and neutron moderating and absorbing characteristics that are substantially the same as the neutron moderating and absorbing characteristics of the first material; emitting fast neutrons into a sample of the first material having a predetermined volume confined in a predetermined shape; sensing the rate of slow neutrons emerging from the sample of first material; and comparing the rate sensed in the sensing of the sample of the first material with the rates sensed in the sensing of the plurality of samples of the second material to determine the density of the first material.

REFERENCES:
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M. K. Nagpal, P. P. Mehta, K. K. Nagpaul and Rama, "Characteristics of a Neutron Moisture Gauge with a Solid State Detector", Pramana, (India), vol. 1, No. 2, (1973), pp. 112-116.
H. A. Lepper, Jr. and R. B. Rogers, "Nuclear Methods for Determining the Water Content and Unit Weight of Fresh Concrete", Journal of Materials, JMLSA, vol. 6, No. 4, (Dec. 1971), pp. 826-841.
"Audio Signal Announces Interface Arrival", F. L. Resen, The Oil and Gas Journal, Nov. 7, 1955.

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