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The spectrum-averaged cross section investigation of 117 Sn(n,n') 117m Sn and 67 Zn(n,p) 67 Cu reactions
Appl Radiat Isot. 2024 Mar 30;209:111306. doi: 10.1016/j.apradiso.2024.111306. Online ahead of print.ABSTRACTThe spectrum averaged cross sections (SACS) in standard neutron field, e.g. 252Cf(s.f.), is a preferable tool for cross section evaluation and validation. A set of reaction measurements with high energy thresholds was previously performed. The presented work focuses on lower energy threshold reactions, namely on the inelastic scattering of the tin foil, more specifically the reaction 117Sn(n,n')117mSn, and the zinc foil reaction, namely 67Zn(n,p)67Cu. These reactions are of special interest due to their intermediate...
Source: Applied Radiation and Isotopes - April 10, 2024 Category: Radiology Authors: Alena Krechlerov á Michal Ko šťál Ev žen Losa Martin Schulc Tom áš Czakoj David Tisseur Ev žen Novák Jan Šimon Nicolas Thiollay Source Type: research

Thermal neutron dose measurements using TLD-100 detectors in the IPEN/MB-01 reactor core
Appl Radiat Isot. 2024 Mar 24;208:111302. doi: 10.1016/j.apradiso.2024.111302. Online ahead of print.ABSTRACTConsiderable experimental effort has been aimed at uncovering a reliable way to perform a dosimetric assessment in mixed radiation fields. In fields composed by gammas and neutrons, TLD dosimeters are usually applied to execute such measurements, although there is no consensus on the most favorable strategy to employ them. In this context, TLD-100 measurements within two different core configurations of the IPEN/MB-01 research reactor and Monte Carlo simulations have been used to investigate the behavior of those de...
Source: Applied Radiation and Isotopes - April 9, 2024 Category: Radiology Authors: T ássio Antonio Cavalieri Paulo de Tarso Dalledone Siqueira Julian Marco Barbosa Shorto Helio Yoriyaz Source Type: research

Simulation and calibration of radiation monitoring of nuclear power plant containment sump waste liquid
Appl Radiat Isot. 2024 Apr 1;208:111311. doi: 10.1016/j.apradiso.2024.111311. Online ahead of print.ABSTRACTWaste liquid stored in the containment sumps of nuclear power plants may contain a variety of radionuclides. Real-time monitoring of containment sump waste liquid can ensure that accidents, such as leakage of cooling water, can be avoided. This paper presents the design of a radioactive monitoring system for waste liquid in a containment sump. The detector and the lead-shield in the measurement unit are optimized through Monte Carlo simulations. Experimental verification showed that the background count rate of the m...
Source: Applied Radiation and Isotopes - April 9, 2024 Category: Radiology Authors: Fei Li Chu-Yang Luo Ying-Zi Wen Sheng Lv Guo-Qiang Zeng Xiao-Hui Liu Chao Xiong Source Type: research

Effect of rare-earth oxide (Eu 2 O 3 ) on the physical, mechanical, acoustic and radiation shielding properties of the CaO-Gd 2 O 3 -SiO 2 -B 2 O 3 glasses
In this study, we examined the effectiveness of europium-doped calcium gadolinium silicoborate glasses for determining their physical, mechanical, acoustic and radiation shielding properties with compositions of 25Gd2O3-10CaO-10SiO2-xEu2O3 -(55-x) B2O3 (where, x is 0.1, 0.2, 0.3, and 0.4 mol%). These glasses were theoretically analyzed using the Geant4 toolkit and Phy-X PSD software to calculate their performance for x-ray energies ranging from 0.2 to 1.2 MeV. The physical, acoustic and mechanical properties were determined using the Makishima-Mackenzie (MM) model. As the content of Eu2O3 increases, the density of the glas...
Source: Applied Radiation and Isotopes - April 9, 2024 Category: Radiology Authors: D Naderi M Ahmadi V Zanganeh Source Type: research

Application of frequency characteristic extraction in increasing the accuracy of X-ray based thickness gauges used for aluminum alloys employing GMDH neural network
Appl Radiat Isot. 2024 Mar 30;208:111310. doi: 10.1016/j.apradiso.2024.111310. Online ahead of print.ABSTRACTRadiation-based gauges have been widely utilized in the industry as a dependable, non-destructive method of measuring metal layer thickness. It is only possible to trust the conventional radiation thickness meter when the material's composition is known in advance. Thickness measurement errors are to be anticipated in contexts like rolled metal factories, where the real component of the material could diverge greatly from the stated composition. An X-ray-based device was suggested in this study to measure aluminum s...
Source: Applied Radiation and Isotopes - April 8, 2024 Category: Radiology Authors: Abdulilah Mohammad Mayet V P Thafasal Ijyas M Ramkumar Raja Mohammed Abdul Muqeet Neeraj Kumar Shukla Source Type: research

Thermoluminescent dosimeters (TLD-100) for absorbed dose measurements in alpha-emitting radionuclides
Appl Radiat Isot. 2024 Mar 29;208:111307. doi: 10.1016/j.apradiso.2024.111307. Online ahead of print.ABSTRACTEarly works that used thermoluminescent dosimeters (TLDs) to measure absorbed dose from alpha particles reported relatively high variation (10%) between TLDs, which is undesirable for modern dosimetry applications. This work outlines a method to increase precision for absorbed dose measured using TLDs with alpha-emitting radionuclides by applying an alpha-specific chip factor (CF) that individually characterizes the TLD sensitivity to alpha particles. Variation between TLDs was reduced from 21.8% to 6.7% for the sta...
Source: Applied Radiation and Isotopes - April 2, 2024 Category: Radiology Authors: Andrew J White Sean P Jollota Cliff G Hammer Ahtesham U Khan Larry A DeWerd Wesley S Culberson Source Type: research

Temperature-dependent photoluminescence of novel Eu 3+ , Tb 3+ , and Dy 3+ doped LaCa 4 O(BO 3 ) 3 : Insights at low and room temperatures
This study explores the structural and optical qualities of LaCa4O(BO3)3 (LACOB) phosphors doped with Eu3+, Dy3+, and Tb3+ using a microwave-assisted sol-gel technique. It uncovers oxygen-related luminescence defects in LACOB, highlighting emission peaks at 489 and 585 nm for Dy3+, a distinct sharp peak at 611 nm for Eu3+ in the red spectrum, and a notable green emission for Tb3+ due to specific transitions. The photoluminescence (PL) analysis indicates that luminescence is optimized through precise doping, leveraging dipole interactions, and localized resonant energy transfer, which are influenced by dopant concentration ...
Source: Applied Radiation and Isotopes - March 31, 2024 Category: Radiology Authors: Abeer S Altowyan M B Coban U H Kaynar Jabir Hakami M Ayvacikli A Hiziroglu N Can Source Type: research