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Probing of nuclear radiation attenuation and mechanical features for lithium bismuth borate glasses with improving Bi2O3 content for B2O3 + Li2O amounts
Results in Physics ( IF 5.3 ) Pub Date : 2021-04-30 , DOI: 10.1016/j.rinp.2021.104246
G. Lakshminarayana , Ashok Kumar , H.O. Tekin , Shams A.M. Issa , M.S. Al-Buriahi , M.G. Dong , Dong-Eun Lee , Jonghun Yoon , Taejoon Park

Against photon energies extending from 0.015 to 15 MeV, MCNPX, FLUKA and PHITS codes are operated to simulate mass attenuation coefficients (μ/ρ) for a total of ten B2O3-Bi2O3-Li2O glass compositions with added Bi2O3 amount from 10 to 55 mol% (5 mol% growth gradually) as a substitute for total (B2O3 + Li2O) mol% content. All the computed μ/ρ values correctness is examined by Py-MLBUF and WinXCOM programs’ μ/ρ outcomes and we found a good agreement among them. 55Bi2O3-35B2O3-10Li2O (mol%) glass half-value layer (HVL) and mean free path (MFP) quantities are compared with distinct commercial γ-ray attenuating glasses, alloys, polymers, concretes and lead and ceramics corresponding values. Next, equivalent atomic numbers (Zeq) and by employing geometric progression (GP) fitting method at 1–40 mfp PDs (penetration depths), at 0.015–15 MeV energy range ‘buildup factors’ were calculated. At all chosen twenty-five energies derived radiation protection efficiency (RPE) results assured investigated samples exemplary competence for low energy photons absorption. Applying SRIM codes ΨP and ΦP and ΨA and ΦA (mass stopping powers (MSPs) and projected ranges (PRs) for protons and α-particles), and making use of ESTAR database ΨE (electron MSP) and continuous slowing‐down approximation (CSDA) range for electrons are determined at KE (kinetic energy) range of 0.015–15 MeV. Moreover, fast neutron removal cross-sections (ΣR), for 0.0253 eV energy neutrons absorption cross-sections have been estimated. Deduced ΣR was altered at 0.1105–0.1205 cm−1 range with Bi2O3 inclusion in studied samples. 10Bi2O3-70B2O3-20Li2O (mol%) glass has greater total cross-section (=23.251 cm−1) for thermal neutrons absorption while 55Bi2O3-35B2O3-10Li2O (mol%) sample exhibits quality shielding factors for photons and fast neutrons confirming the included Bi2O3 positive impact. Along with nuclear attenuation features various physical and mechanical aspects are also inspected. Derived Vm (molar volume), OPD (oxygen packing density), Vo (oxygen molar volume), Vt (packing density) and Gt (dissociation energy per unit volume) values indicated glasses rigidity. Following Makishima–Mackenzie's theoretical model primary mechanical features like Y, K, S and L (Young's, bulk, shear and longitudinal modulus) and σ (Poisson's ratio) are evaluated where 10Bi2O3-70B2O3-20Li2O (mol%) glass shows better elastic moduli in all samples.



中文翻译:

通过提高B 2 O 3  + Li 2 O的Bi 2 O 3含量来研究硼酸锂铋玻璃的核辐射衰减和力学性能

针对从0.015到15 MeV的光子能量,操作MCNPX,FLUKA和PHITS代码以模拟总共添加了10种B 2 O 3 -Bi 2 O 3 -Li 2 O玻璃组合物的质量衰减系数(μ / ρ)。Bi 2 O 3的量为10至55 mol%(逐渐增长5 mol%),以代替总(B 2 O 3  + Li 2 O)mol%的含量。Py-MLBUF和WinXCOM程序的μ/ρ结果检查了所有计算出的μ/ρ值的正确性,我们发现它们之间有很好的一致性。55Bi 2 O 3 -35B将2 O 3 -10Li 2 O(mol%)玻璃半值层(HVL)和平均自由程(MFP)量与不同的商业γ射线衰减玻璃,合金,聚合物,混凝土以及铅和陶瓷的相应值进行比较。接下来,当量原子数(Z eq)并通过采用几何级数(G P)拟合方法在1–40 mfp PD(穿透深度)下,计算出在0.015–15 MeV能量范围内的“累积因子”。在所有选定的25个能量中,得出的辐射防护效率(RPE)结果确保了所研究的样品对低能量光子吸收的示范能力。施加SRIM码Ψ P和Φ P和Ψ和Φ(质量停止功率(MSP的)和投影范围(PRS),用于质子和α α粒子),并利用ESTAR数据库Ψ的ë(电子MSP)和连续缓行近似(CSDA)对于电子是范围在0.015–15 MeV的KE(动能)范围内测定。此外,快中子去除截面(Σ [R ),为0.0253电子伏特能量的中子吸收截面进行了估计。推导Σ ř在0.1105-0.1205厘米改变-1范围的Bi 2 ö 3夹杂物研究的样品英寸 10Bi 2 O 3 -70B 2 O3 -20Li 2 O(mol%)玻璃对热中子的吸收具有更大的总横截面(= 23.251 cm -1),而55Bi 2 O 3 -35B 2 O 3 -10Li 2 O(mol%)样品表现出优良的屏蔽系数用于光子和快中子,证实了所包含的Bi 2 O 3的正面影响。除了核衰减特征外,还检查了各种物理和机械方面。得出V m(摩尔体积),OPD(氧气堆积密度),V o(氧气摩尔体积),V t(堆积密度)和Gt(每单位体积的离解能)值表示玻璃的刚度。以下卷岛-麦肯齐的理论模型主要机械特性,如Y,K,S大号(杨氏,体积,剪切和纵向弹性模量)和σ(泊松比)进行评估,其中10Bi 2 ö 3 -70B 2 ö 3 -20Li 2 O(摩尔%)玻璃在所有样品中显示出更好的弹性模量。

更新日期:2021-05-05
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