<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Ulrich Schimschal</dc:creator>
  <dc:date>1980</dc:date>
  <dc:description>The theory for the evaluation of the effects of geometry in gamma ray absorption is developed for cylindrical scintillation detectors as applicable to borehole gamma spectrometry. The results of a laboratory experiment are shown for comparison. A calibration procedure to determine detector efficiency is given for application to borehole probes. It is shown that the response of a crystal can be separated in terms of geometric effects and instrumentation effects. It is also shown that approximating crystal detectors with point detectors in mathematical theory is grossly oversimplified. (USGS)</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.3133/ofr80688</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>U.S. Geological Survey,</dc:publisher>
  <dc:title>Scintillation detectors in gamma spectral logging; geometry, absorption and calibration</dc:title>
  <dc:type>reports</dc:type>
</oai_dc:dc>