Gamma-Ray Spectrometry of Rocks

Gamma-Ray Spectrometry of Rocks

1st Edition - January 1, 1970

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  • Authors: John A. S. Adams, Paolo Gasparini
  • eBook ISBN: 9781483257341

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Gamma-Ray Spectrometry of Rocks: Methods in Geochemistry and Geophysics provides information pertinent to the fundamental aspects of the gamma-ray spectrometry of rocks. This book discusses the increasing interest in using gamma spectrometry in the search for uranium ore. Organized into seven chapters, this book begins with an overview of the approximate frequency and wave length of electromagnetic radiations. This text then examines the quantitative detection of X and gamma photons, which is based upon their interactions with matter. Other chapters consider the inorganic scintillation crystals as the most favorable detectors due to its requirement of a high intrinsic efficiency. This book discusses as well the shape of the spectrum of a monoenergetic gamma-ray beam, which is dependent on the photon energy. The final chapter deals with the determination of the abundances of natural radioisotopes and their stable end products in a rock or mineral. This book is a valuable resource for radiological health physicists, chemists, geochemists, and exploration geologists.

Table of Contents

  • Preface

    Chapter 1. Physics of Gamma and X-Rays


    Gamma-Ray Emission

    X-Ray Emission

    Absorption of Gamma and X-Rays

    Photoelectric Absorption

    Compton Scattering

    Pair Production


    Chapter 2. Detectors


    Gas-Filled Detectors

    Geiger-Mueller (GM) Counters

    Proportional Counters

    High Pressure Ionization Chambers

    Scintillation Detectors

    Semiconductor Detectors

    Chapter 3. Laboratory and Field Instrumentation

    Laboratory Instrumentation

    Field Surveys

    Surface Field Surveys

    Airborne Surveys

    Borehole Logging

    Chapter 4. Gamma Ray Emitters

    Natural Emitters

    Potassium 40

    Thorium 232 Series

    Uranium 238 Series

    Uranium 235 Series

    Artificial Emitters

    Chapter 5. Calibration of Laboratory Spectrometers and Analysis of Spectra

    Gamma Spectra

    Energy Calibration

    Absolute Calibration and Spectral Analysis

    General Case

    Ordinary Rock Analysis

    Computer Techniques

    Detection Limits and Counting Errors

    Chapter 6. Related and Collaborative Techniques

    Neutron Activation

    Alpha Spectrometry

    Autoradiographic Techniques

    Radiation Damage in Solids

    Chemical Methods

    Coincidence Counting

    Chapter 7. Case Histories


    Determination of 40K

    Determination of the Gamma Emission Rate from Natural K

    Geological Tracers

    Magmatic Differentiation

    Mapping of Petrologic Units

    Heat now Studies

    DisequiUbria in Natural Radioactive Series

    Lunar Gamma Spectrometry

    Tektites and Meteorites

    Economic Considerations

    Appendix 1. Absorption Coefficients from the Data Reported by Grodstein (1957)

    Appendix 2. Some Gamma Spectra of Natural Isotopes and Fall-Out Products

    Appendix 3. Determinations ofU, Th, K2O in Inter-Laboratory Geochemical Rock Standards



Product details

  • No. of pages: 308
  • Language: English
  • Copyright: © Elsevier 1970
  • Published: January 1, 1970
  • Imprint: Elsevier
  • eBook ISBN: 9781483257341

About the Authors

John A. S. Adams

Paolo Gasparini

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