Advertisement

Journal of Radioanalytical and Nuclear Chemistry

, Volume 269, Issue 3, pp 615–618 | Cite as

Improvement ofin vivoneutron activation analysis of Mn using a 4p NaI(Tl) detector array

  • S. H. Byun
  • A. Pejović-Milić
  • W. V. Prestwich
  • D. R. Chettle
  • F. E. McNeill
Article

Summary

Manganese contents in hand phantoms were analyzed by in vivo neutron activation analysis using a 4p NaI(Tl) detector array. Solution-type phantoms with varying amount of Mn and fixed amounts of physiological normal elements (Na, Cl, Ca) were prepared in a cylindrical shape to simulate fisted hands and were irradiated with the 7Li(p,n) neutron beam. The proton energy and polyethlyene cavity were set at optimized conditions established before. The g-ray spectra were accumulated under the anticoincidence mode. The calibration was done both for the 847 keV full-energy peak area and for the total area of 56Mn, which is defined as the total number of counts anywhere in the g-ray spectrum from 56Mn. From the analysis of the 847 keV peak, the Mn detection limit has been improved by a factor of 1.6 compared to the previous feasibility test thanks to a significant gain in the g-ray detection efficiency. Further improvement by a factor of 1.2 was identified when the total area of 56Mn was used for the calibration. The final sensitivity and detection limit for a 20 mSv hand dose reached 12,050 counts/mg Mn, and 86 mg, respectively. The overall improvement achieved in this study will be a considerable contribution toward realization of the clinical application.

Keywords

Neutron Activation Analysis Neutron Beam Radiation Isotope Natural Background Radiation Peak Counting Rate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag/Akadémiai Kiadó 2006

Authors and Affiliations

  • S. H. Byun
    • 1
  • A. Pejović-Milić
    • 2
  • W. V. Prestwich
    • 3
  • D. R. Chettle
    • 4
  • F. E. McNeill
    • 5
  1. 1.Medical Physics and Applied Radiation Sciences, McMaster University
  2. 2.Medical Physics and Applied Radiation Sciences, McMaster University; Ryerson University
  3. 3.Medical Physics and Applied Radiation Sciences, McMaster University
  4. 4.Medical Physics and Applied Radiation Sciences, McMaster University
  5. 5.Medical Physics and Applied Radiation Sciences, McMaster University

Personalised recommendations