Enhancement of gamma-ray shielding properties in cobalt-doped heavy metal borate glasses: The role of lanthanum oxide reinforcement


Almisned G., Elshami W., Issa S. A. M., Susoy G., Zakaly H. M. H., Algethami M., ...More

Materials, vol.14, no.24, 2021 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 14 Issue: 24
  • Publication Date: 2021
  • Doi Number: 10.3390/ma14247703
  • Journal Name: Materials
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, CAB Abstracts, Communication Abstracts, Compendex, INSPEC, Metadex, Veterinary Science Database, Directory of Open Access Journals, Civil Engineering Abstracts
  • Keywords: lead borate glasses, gamma ray, mass attenuation, radiation resistance, MASS ATTENUATION COEFFICIENTS, EFFECTIVE ATOMIC NUMBERS, EXPOSURE BUILDUP FACTORS, ELECTRON-DENSITIES, ENERGY-ABSORPTION, RADIATION, LITHIUM, PHOTON, FEATURES, LA2O3
  • Istanbul University Affiliated: Yes

Abstract

© 2021 by the authors. Licensee MDPI, Basel, Switzerland.The direct influence of La3+ ions on the gamma-ray shielding properties of cobalt-doped heavy metal borate glasses with the chemical formula 0.3CoO-(80-x)B2O3-19.7PbO-xLa2O3: x = 0, 0.5, 1, 1.5, and 2 mol% was examined herein. Several significant radiation shielding parameters were evaluated. The glass density was increased from 3.11 to 3.36 g/cm3 with increasing La3+ ion content from 0 to 2 mol%. The S5 glass sample, which contained the highest concentration of La3+ ions (2 mol%), had the maximum linear (μ) and mass (μm) attenuation coefficients for all photon energies entering, while the S1 glass sample free of La3+ ions possessed the minimum values of μ and μm. Both the half value layer (T1/2) and tenth value layer (TVL) of all investigated glasses showed a sim-ilar trend of (T1/2, TVL)S1 > (T1/2, TVL)S2 > (T1/2, TVL)S3 > (T1/2, TVL)S4 > (T1/2, TVL)S5. Our results re-vealed that the S5 sample had the highest effective atomic number (Zeff) values over the whole range of gamma-ray energy. S5 had the lowest exposure (EBF) and energy absorption (EABF) build-up factor values across the whole photon energy and penetration depth range. Our findings give a strong indication of the S5 sample’s superior gamma-ray shielding characteristics due to the highest contribution of lanthanum oxide.