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dc.contributor.authorLundien, Jerry R.-
dc.contributor.authorMobility and Environmental Systems Laboratory (U.S.)-
dc.identifier.govdocTechnical Report No. 3-693 Report 3-
dc.descriptionTechnical Reporten_US
dc.description.abstractGamma-ray spectra over the energy range 0 to 2.82 mev were obtained from samples of sand, silt, and clay. All tests were conducted in the laboratory in a specially designed low-background enclosure. Data were analyzed by considering both photopeak energy level and radioactive source content in relation to soil parameters. The results indicate that the thorium, uranium, and potassium photopeak counts are proportional to moisture content expressed as a percentage of dry soil weight. When expressed as ratios to one another, the photopeaks lose nearly all moisture content information but appenr to be related to each of the three selected specific soil types. Appendixes A and B present a listing of the FORTRAN computer program and a discussion of the data reduction techniques that it uses in the analysis of gamma-ray spectral data.en_US
dc.description.sponsorshipSponsored by U. S. Army Materiel Command Project No. 1-V-0-14501- B52A, Task 01, Project No. 1-V-0-21701-A-046, Task 04en_US
dc.description.tableofcontentsFOREWORD-v NOTATION-ix SUMMARY-xi PART I: INTRODUCTION-1 Background-1 Purpose and Scope-2 Definitions-3 PART II: TEST PROGRAM-5 Soils Used-5 Preparation of Soil Samples-6 Equipment Used -6 Measurement of Gamma-ray Spectrum-10 PART III: DATA ANALYSIS-15 Theory of Gamma-ray Spectral Analysis-15 Basis of Analysis-24 Discussion of Test Results -29 PART IV: CONCLUSIONS AND RECOMMENDATIONS-40 Conclusions-40 Recommendations-40 LITERATURE CITED-41 TABLES 1 and 2 PLATES 1-34 APPENDIX A: DATA REDUCTION TECHNIQUES IN COMPUTER PROGRAM-A1 Photopeak Location -A1 Spectra Correction-A1 Photopeak Separation -A5 Calculation of Photopeak Resolution-A9 Source Calibration-A12 APPENDIX B: FORTRAN COMPUTER PROGRAM-B1 TABLES Bl-B3-
dc.format.extent150 pgs / 5.607Mb-
dc.publisherU.S. Army Engineer Waterways Experiment Stationen_US
dc.relation.ispartofseriesTechnical Report (U.S. Army Engineer Waterways Experiment Station);no. 3-693 rept.3-
dc.rightsApproved for public release; distribution is unlimited-
dc.sourceThe ERDC Library created this digital resource using one or more of the following: Zeta TS-0995, Zeutcehl OS 12000, HP HD Pro 42-in. map scanner, Epson flatbed-
dc.subjectRadioactive substances in soilsen_US
dc.subjectGamma ray spectrometryen_US
dc.subjectComputer programsen_US
dc.titleTerrain Analysis by Electromagnetic Means. Report 3, Laboratory Investigation in the 0- to 2.82-Mev Gamma-Ray Spectral Regionen_US
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