Neutron self-shielding correction in application of k(0)-NAA standardization method to determine Mn content in manganese ores

AKKAYA G., YÜCEL H., BUDAK M. G.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, cilt.475, ss.1-7, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 475
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.nimb.2020.04.025
  • Dergi Adı: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Analytical Abstracts, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.1-7
  • Anahtar Kelimeler: Manganese ore, k(0)-NAA standardization method, Neutron self-shielding effect, Am-Be isotopic neutron source, ACTIVATION ANALYSIS, UNIVERSAL CURVE, SAMPLES, ACCURACY, NAA
  • Ankara Üniversitesi Adresli: Evet

Özet

In this study, it is aimed to investigate neutron self-shielding effect in application of k(0)-NAA standardization method to determine Mn contents in manganese ores. Because the neutron self-shielding correction factors are significant factors in application of k(0)-NAA method for large samples. To estimate these, several Mn-ore samples and Au monitor were irradiated separately in a 37 GBq Am-241-Be neutron source irradiation unit and then they were measured by using a 78.5% relative efficient HPGe detector. In this study, the sigmoid function approaches for calculation of G(th) and G(e) factors were applied for the right cylinder sample geometry at known elemental compositions in samples, determined by EDXRF technique with a 25 mm(2) Silicon Drift Detector (SDD). The present results indicate that k(0)-NAA method is applicable successfully to determine Mn contents in Mn-ore samples providing that G(th) and G(e) factors are estimated accurately even if a low-flux isotopic neutron source is used.