Abstract:
MCNPX, Geant4 and FLUKA codes are employed to compute mass attenuation coefficients (mu/rho) for 20Bi(2)O(3)-(80x)B2O3-xPbO (x = 0, 20, 30, 40 and 60 mol%) glasses at 20, 30, 40 and 60 KeV, Ba-133 (81, 161, 223, 276, 303, 356 and 384 keV), Co-57 (122 and 136 KeV), Na-22 (511 and 1275 keV), Cs-137 (662 keV), Mn-54 (835 keV), Co-60 (1173 and 1333 keV) and K-42 (1524 keV) photon peaks where 20, 30, 40 and 60 KeV energies are utilized for Mammography, Dental, General and Computed tomography (CT) scanning accordingly, in this study. All simulated mu/rho outcomes accuracy was verified by WinXCOM and Phy-X/PSD programs' mu/. findings and we noticed a satisfactory agreement among them. From mu/rho and linear attenuation coefficient (mu) values effective atomic number (Z(eff)), effective electron density (N-eff), half-value layer (HVL), tenth-value layer (TVL) and mean free path (MFP) have been determined. 20Bi(2)O(3)-20B(2)O(3)-60PbO (mol%) glass HVL and MFP have been compared with some commercial glasses, alloys, polymers, concretes and lead and ceramics corresponding values. Later equivalent atomic numbers (Z(eq)) and applying geometric progression (G-P) fitting method at 1 - 40 mfp penetration depths (PDs) at 0.015-15 MeV energy range exposure buildup factors (EBFs) and energy absorption buildup factors (EABFs) were estimated. At all selected twenty energies derived radiation protection efficiency (RPE) results confirmed studied samples' excellent efficacy for low energy photons absorption. Moreover, applying SRIM codes mass stopping powers (MSPs) and projected ranges (PRs) for protons and a-particles and utilizing ESTAR database electron MSPs and continuous slowing down approximation (CSDA) range for electrons were determined at kinetic energy (KE) range of 0.015-15 MeV. Further fast neutron removal cross-sections (Sigma(R)), for 0.0253 eV energy neutrons coherent and incoherent scattering cross-sections (sigma(cs) and sigma(ics)), absorption cross-section (sigma(A)) and total cross-section (sigma(T)) quantities were evaluated. Derived Sigma(R) was changed at 0.1166-0.123 cm(1) range depending on PbO addition in chosen samples. 20Bi(2)O(3)-80B(2)O(3) (mol%) glass has larger sigma(T) (23.094 cm(-1)) in all studied samples for thermal neutron absorption while 20Bi(2)O(3)-20B(2)O(3)-60PbO (mol%) sample shows superior attenuation factors for photons and fast neutrons signifying included PbO positive effect.
Description:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. NRF2018R1A5A1025137) and the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE), Korea (No. 20172010105470).
Bu yayın 06.11.1981 tarihli ve 17506 sayılı Resmî Gazete’de yayımlanan 2547 sayılı Yükseköğretim Kanunu’nun 4/c, 12/c, 42/c ve 42/d maddelerine dayalı 12/12/2019 tarih, 543 sayılı ve 05 numaralı Üniversite Senato Kararı ile hazırlanan Sakarya Üniversitesi Açık Bilim ve Açık Akademik Arşiv Yönergesi gereğince açık akademik arşiv sistemine açık erişim olarak yüklenmiştir.
Bu yayın 06.11.1981 tarihli ve 17506 sayılı Resmî Gazete’de yayımlanan 2547 sayılı Yükseköğretim Kanunu’nun 4/c, 12/c, 42/c ve 42/d maddelerine dayalı 12/12/2019 tarih, 543 sayılı ve 05 numaralı Üniversite Senato Kararı ile hazırlanan Sakarya Üniversitesi Açık Bilim ve Açık Akademik Arşiv Yönergesi gereğince açık akademik arşiv sistemine açık erişim olarak yüklenmiştir.