Determination of K shell absorption jump factors and jump ratios in the elements between Tm(Z=69) and Os(Z=76) by measuring K shell fluorescence parameters


KAYA N. , TIRAŞOĞLU E., APAYDIN G.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, cilt.266, ss.1043-1048, 2008 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 266 Konu: 7
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.nimb.2008.02.018
  • Dergi Adı: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
  • Sayfa Sayıları: ss.1043-1048

Özet

The K shell absorption jump factors and jump ratios have been measured in the elements between Tm (Z = 69) and Os(Z = 76) without having any mass attenuation coefficient at the upper and lower energy branch of the K absorption edge. The jump factors and jump ratios for these elements have been determined by measuring K shell fluorescence parameters such as the total atomic absorption cross-sections, the K(alpha) X-ray production cross-sections, the intensity ratio of the K(beta) and K(alpha) X-rays and the K shell fluorescence yields. We have performed the measurements for the calculations of these values in attenuation and direct excitation experimental geometry. The K Xray photons are excited in the target using 123.6 keV gamma-rays from a strong (57)Co source, and detected with an Ultra-LEGe solid state detector with a resolution 0.15 keV at 5.9 UK The measured values have been compared with theoretical and others' experimental values. The results have been plotted versus atomic number. @ 2008 Elsevier B.V. All rights reserved.