Low level activity determination by means of gamma spectrometry with respect to the natural background fluctuation

Appl Radiat Isot. 2013 Nov:81:123-7. doi: 10.1016/j.apradiso.2013.03.017. Epub 2013 Mar 16.

Abstract

The determination of low level activities of natural radionuclides from the uranium and thorium series by gamma-spectrometry faces the problem of proper natural background subtraction. Background fluctuation can cause differences in activity determination. Also the minimum detectable activity (MDA) of natural and artificial radionuclides can be influenced by background fluctuation. In this paper, results of the background fluctuation of shielded HPGe detectors with relative efficiency of 50-150% are presented together with the assessment of its influence on the determination of natural and artificial radionuclides.

Keywords: Activity determination; Background fluctuation; Gamma spectrometry; MDA.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Algorithms*
  • Artifacts*
  • Background Radiation*
  • Equipment Design
  • Equipment Failure Analysis
  • Radiation Dosage
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Spectrometry, Gamma / instrumentation*
  • Spectrometry, Gamma / methods*
  • Thorium / analysis*
  • Uranium / analysis*

Substances

  • Uranium
  • Thorium