A THEORY OF THE NUCLEAR DENSIMETER

THE THEORETICAL BASIS OF THE SIMPLE BACK-SCATTERING GAGE IS PRESENTED. IT IS APPARENT FROM THE THEORETIC EXPLANATIONS FOR THE OPERATION OF THE BACK-SCATTER AND THE TRANSMISSION /OR DIRECT RADIATION/ TYPE OF GAGE, THAT IN RESPECT TO SENSITIVITY AND IMPROVED PERFORMANCE THE LATTER IS MORE CAPABLE BECAUSE IN BACK-SCATTER GAGE THE BACK-SCATTERING INCREASES WITH DENSITY AND THE ATTENUATION ALONG THE TWO-WAY TRANSMISSION PATH THROUGH THE SOIL HAS THE EFFECT OF DECREASING THE SIGNAL WITH INCREASE OF DENSITY. CALIBRATION CURVES IN BOTH TYPES OF INSTRUMENTS DEPEND ON THE MASS ABSORPTION COEFFICIENT FOR THE PRIMARY RADIATION. THE PRECISION OF MEASUREMENT POSSIBLE WITH THE NUCLEAR METHOD MEASURING THE DENSITY OF SOILS IS INDICATED FROM THE THEORETICAL DEVELOPMENT SHOWING HOW THE INSTRUMENT SHOULD BE USED TO OBTAIN THE BEST PERFORMANCE.

• Supplemental Notes:
  • Vol 104, No 1, PP 25-34, 9 FIG, 1 TAB, 5 REF
• Authors:
  • TAYLOR, D
  • Kansara, M
• Publication Date: 1967-7

Media Info

• Serial:
  • Soil Science

Subject/Index Terms

• TRT Terms: Absorption; Accuracy; Backscattering; Calibration; Mass; Measurement; Nuclear engineering; Nuclear tests; Theory; Transmissions
• Old TRIS Terms: Nuclear applications
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00216177
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 30 1994 12:00AM