Measurement of mass attenuation coefficients in some Cr, Co and Fe compounds around the absorption edge and the validity of the mixture rule

Turgut U., Simsek O., BÜYÜKKASAP E.

PRAMANA-JOURNAL OF PHYSICS, cilt.69, sa.2, ss.199-207, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 69 Sayı: 2
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1007/s12043-007-0121-6
  • Dergi Adı: PRAMANA-JOURNAL OF PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.199-207
  • Atatürk Üniversitesi Adresli: Evet

Özet

The total mass attenuation coefficients for elements Cr, Co and Fe and compounds CrCl2, CrCl3, Cr-2(SO4)(3)K2SO4 center dot 24H(2)O, CoO, CoCl2, Co(CH3CoO)(2), FePO4, FeCl3 center dot 6H(2)O, Fe(SO4)(2)NH4 center dot 12H(2)O were measured at different energies between 4.508 and 14.142 keV using secondary excitation method. Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Br, Rb, Sr were chosen as secondary exciters. 59.5 keV gamma-rays emitted from a Am-241 annular source were used to excite a secondary exciter and K-alpha (K-L-3, L-2) lines emitted by the secondary exciter were counted by a Si(Li) detector with a resolution of 160 eV at 5.9 keV. It was observed that mixture rule method is not a suitable method for determination of the mass attenuation coefficients of compounds, especially at an energy that is near the absorption edge. The obtained values were compared with theoretical values.