Feasibility of gadolinium oxide paint as neutron shielding

2021 ◽  
pp. 166175
Author(s):  
D.S. Burke ◽  
S.H. Byun
Keyword(s):  
Gadolinium Oxide ◽  
Neutron Shielding

Gadolinium Oxide Nanoparticles as Potential Multimodal Imaging and Therapeutic Agents

2013 ◽  
Vol 13 (4) ◽  
pp. 422-433 ◽  
Author(s):  
Tae Jeong Kim ◽  
Kwon Seok Chae ◽  
Yongmin Chang ◽  
Gang Ho Lee
Keyword(s):  
Multimodal Imaging ◽  
Therapeutic Agents ◽  
Gadolinium Oxide ◽  
Oxide Nanoparticles ◽  
Gadolinium Oxide Nanoparticles

scholarly journals Enhancement of the Shielding Capability of Soda–Lime Glasses with Sb2O3 Dopant: A Potential Material for Radiation Safety in Nuclear Installations

2020 ◽  
Vol 11 (1) ◽  
pp. 326
Author(s):  
M.I. Sayyed ◽  
K.A. Mahmoud ◽  
O.L. Tashlykov ◽  
Mayeen Uddin Khandaker ◽  
M.R.I. Faruque
Keyword(s):  
Attenuation Coefficient ◽  
Elastic Moduli ◽  
Gamma Ray ◽  
Radiation Safety ◽  
Soda Lime ◽  
Mass Attenuation Coefficient ◽  
Transmission Factor ◽  
Linear Attenuation Coefficient ◽  
Neutron Shielding ◽  
Removal Cross Section

Elastic moduli were theoretically computed using the Makishima–Mackenzie model for SiO2–Na2O–CaO glasses doped with Sb2O3 contents. The calculated elastic moduli (Young’s, bulk, shear, and longitudinal modulus) were observed to increase with an increase in the Sb2O3 contents. The microhardness showed an increase, while Poisson’s ratio decreased with the rise of the Sb2O3 contents. In addition, gamma-ray and neutron shielding parameters were evaluated for the investigated glasses. The linear attenuation coefficient (LAC) was simulated using the Monte Carlo N-particle transport code (MCNP-5). Other parameters, such as the mass attenuation coefficient (MAC), transmission factor (TF), and half-value layer, were calculated based on the simulated LAC. The addition of Sb2O3 content was observed to enhance the investigated glasses’ shielding parameters, where the highest LAC was achieved for the SCNSb10 glass with 10 mol% Sb2O3 and decreased from 0.441 to 0.154 cm−1 at gamma energies between 0.248 and 1.406 MeV. Furthermore, the fast neutron effective removal cross-section (∑R) was computed theoretically. The calculated results showed that the highest ∑R was equal to 0.0341 cm2g−1 and was obtained for the SCNSb0 glass, which had no Sb2O3 content, while the lowest ∑R was equal to 0.0286 cm2 g−1 for the SCNSb10 glass sample. The present work was carried out to examine the advantages of the soda–lime glasses with different Sb2O3 contents in several photon shielding applications, especially for radiation safety in nuclear installations.

Multifiller nanocomposites containing gadolinium oxide and bismuth nanoparticles with enhanced X‐ray attenuation property

2021 ◽  
pp. 51252
Author(s):  
Sangeetha Jayakumar ◽  
Vadivel Mani ◽  
Thangavelu Saravanan ◽  
Karunanithi Rajamanickam ◽  
Alex Daniel Prabhu ◽  
...  
Keyword(s):  
Gadolinium Oxide ◽  
X Ray ◽  
Bismuth Nanoparticles

scholarly journals Radiopharmaceutical and Eu3+ doped gadolinium oxide nanoparticles mediated triple-excited fluorescence imaging and image-guided surgery

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Xiaojing Shi ◽  
Caiguang Cao ◽  
Zeyu Zhang ◽  
Jie Tian ◽  
Zhenhua Hu
Keyword(s):  
Fluorescent Probes ◽  
Signal Intensity ◽  
Tumor Imaging ◽  
Tumor Resection ◽  
Optical Signal ◽  
Gadolinium Oxide ◽  
Image Guided Surgery ◽  
Guided Surgery ◽  
Image Guided ◽  
The Impact

AbstractCerenkov luminescence imaging (CLI) is a novel optical imaging technique that has been applied in clinic using various radionuclides and radiopharmaceuticals. However, clinical application of CLI has been limited by weak optical signal and restricted tissue penetration depth. Various fluorescent probes have been combined with radiopharmaceuticals for improved imaging performances. However, as most of these probes only interact with Cerenkov luminescence (CL), the low photon fluence of CL greatly restricted it’s interaction with fluorescent probes for in vivo imaging. Therefore, it is important to develop probes that can effectively convert energy beyond CL such as β and γ to the low energy optical signals. In this study, a Eu3+ doped gadolinium oxide (Gd2O3:Eu) was synthesized and combined with radiopharmaceuticals to achieve a red-shifted optical spectrum with less tissue scattering and enhanced optical signal intensity in this study. The interaction between Gd2O3:Eu and radiopharmaceutical were investigated using 18F-fluorodeoxyglucose (18F-FDG). The ex vivo optical signal intensity of the mixture of Gd2O3:Eu and 18F-FDG reached 369 times as high as that of CLI using 18F-FDG alone. To achieve improved biocompatibility, the Gd2O3:Eu nanoparticles were then modified with polyvinyl alcohol (PVA), and the resulted nanoprobe PVA modified Gd2O3:Eu (Gd2O3:Eu@PVA) was applied in intraoperative tumor imaging. Compared with 18F-FDG alone, intraoperative administration of Gd2O3:Eu@PVA and 18F-FDG combination achieved a much higher tumor-to-normal tissue ratio (TNR, 10.24 ± 2.24 vs. 1.87 ± 0.73, P = 0.0030). The use of Gd2O3:Eu@PVA and 18F-FDG also assisted intraoperative detection of tumors that were omitted by preoperative positron emission tomography (PET) imaging. Further experiment of image-guided surgery demonstrated feasibility of image-guided tumor resection using Gd2O3:Eu@PVA and 18F-FDG. In summary, Gd2O3:Eu can achieve significantly optimized imaging property when combined with 18F-FDG in intraoperative tumor imaging and image-guided tumor resection surgery. It is expected that the development of the Gd2O3:Eu nanoparticle will promote investigation and application of novel nanoparticles that can interact with radiopharmaceuticals for improved imaging properties. This work highlighted the impact of the nanoprobe that can be excited by radiopharmaceuticals emitting CL, β, and γ radiation for precisely imaging of tumor and intraoperatively guide tumor resection.

scholarly journals Characterization of wood-borax composites as alternative neutron shielding material using neutron radiography techniques

2020 ◽  
Vol 1436 ◽  
pp. 012080
Author(s):  
Agus Salim Afrozi ◽  
Auring Rachminisari ◽  
Rohmad Salam ◽  
Asep Nana S
Keyword(s):  
Neutron Radiography ◽  
Neutron Shielding ◽  
Shielding Material

Effect of added gadolinium oxide on the thermal air oxidation of uranium dioxide

2021 ◽  
Vol 552 ◽  
pp. 153008
Author(s):  
Randall D. Scheele ◽  
Brady D. Hanson ◽  
Andrew M. Casella
Keyword(s):  
Uranium Dioxide ◽  
Gadolinium Oxide ◽  
Air Oxidation

scholarly journals Hydration of gadolinium oxide ( GdOx ) and its effect on voltage-induced Co oxidation in a Pt/Co/GdOx/Au heterostructure

2019 ◽  
Vol 3 (6) ◽  
Author(s):  
Aik Jun Tan ◽  
Mantao Huang ◽  
Sara Sheffels ◽  
Felix Büttner ◽  
Sunho Kim ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Gadolinium Oxide
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