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Zhu Y, Lin Z, Yu H, Yu X. A study on the treatment of brain tumors with BNCT using several moderators with different thicknesses. Appl Radiat Isot 2024; 208:111303. [PMID: 38531243 DOI: 10.1016/j.apradiso.2024.111303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 06/27/2023] [Accepted: 03/19/2024] [Indexed: 03/28/2024]
Abstract
Boron neutron capture therapy (BNCT) is an effective binary radiation therapy that depends on nuclear capture reactions. In recent years, BNCT can be performed without a reactor owing to the development of accelerator-based neutron sources. A new BNCT irradiation facility is proposed, which is based on a 15 mA 2.5 MeV proton accelerator with a 100 μm thickness natural lithium target as a neutron converter. A great quantity of studies has shown that neutron beams with different spectra have unique therapeutic effects on tumors. An appropriate neutron beam for BNCT is obtained by Beam Shaping Assembly (BSA) and the moderator plays a main role in determining the BSA outlet beam spectrum. To figure out the dose distribution in phantom with various kinds of neutron spectrum modes during BNCT, a series of cases are calculated by MCNPX code. The results give a database for treatment of brain tumors with BNCT by using different moderators.
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Affiliation(s)
- Yinan Zhu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; University of Chinese Academy of Science, Beijing, 100049, China
| | - Zuokang Lin
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; University of Chinese Academy of Science, Beijing, 100049, China.
| | - Haiyan Yu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China
| | - Xiaohan Yu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; University of Chinese Academy of Science, Beijing, 100049, China
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Al-Shelkamy SA, El-Hossary FM, Vega-Carrillo HR, Mosa ES, Daha MA, Ghafaar MA, El Kady OA, El-Moula AA. Improving the properties of commercial steel alloys in the industrial/nuclear field by RF plasma carbonitriding. Appl Radiat Isot 2023; 193:110619. [PMID: 36603456 DOI: 10.1016/j.apradiso.2022.110619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 12/06/2022] [Accepted: 12/16/2022] [Indexed: 12/29/2022]
Abstract
The study investigates the effect of RF plasma on the commercial SS201 and Steel alloys physical, structural and nuclear properties, using an atmosphere of nitrogen (85%) plus acetylene (15%) at 500 W working for 0.5 h. The results were compared with untreated alloys and AISI304L. The study indicated the ability of RF plasma to improve both the mechanical and tribological properties of treated alloys compared to the original commercial alloys and the AISI304L, and achieve good shielding properties for industrial/nuclear applications.
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Affiliation(s)
- Samah A Al-Shelkamy
- Physics Department, Faculty of Science, New Valley University, P.O. Box:72511, El-Kharga, Egypt.
| | - F M El-Hossary
- Physics Department, Faculty of Science, Sohag University, P.O. Box: 82524, Sohag, Egypt
| | - Hector Rene Vega-Carrillo
- Unidad Académica de Estudios Nucleares, Universidad Autonoma de Zacatecas, Ciprés 10, Fracc. La Peñuela, 98060, Zacatecas, Zac, Mexico
| | - E S Mosa
- Mining Metallurgy and Petroleum Engineering Department, Al-Azhar University, 11371, Cairo, Egypt
| | - Mohamed A Daha
- Production Engineering Department, Faculty of Engineering, Alexandria University, El-Chatby, Alexandria, 21544, Egypt
| | - M Abdel Ghafaar
- Manufacturing Engineering and Production Technology Department, Modern Acaemy for Engineering and Technology, Cairo, P.O.Box:112571, Egypt
| | - O A El Kady
- Powder Technology Division, Manufacturing Technology Department, Central Metallurgical R & D Institute (CMRDI), P.O. 87, Helwan, 11421, Cairo, Egypt
| | - Aa Abd El-Moula
- Physics Department, Faculty of Science, Sohag University, P.O. Box: 82524, Sohag, Egypt; Physics Department, College of Science, Jouf University, PO Box:2014, Sakaka, Saudi Arabia
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Al-Shelkamy SA, Abu Hashish HM, Salama E. Influence of heat treatment on the mechanical and the lubricant wear characteristics of stainless-steel grades against 5 wt% NaCl as industrial shielding materials. Appl Radiat Isot 2022; 188:110361. [PMID: 35830750 DOI: 10.1016/j.apradiso.2022.110361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 07/03/2022] [Accepted: 07/04/2022] [Indexed: 11/17/2022]
Abstract
This article investigates the impact of the heat treatment, and lubricant wear measurements at 5 wt % NaCl solution, mechanical and radiation shielding properties of three grades of stainless steels: SS316, M303, and SS201. The obtained results showed that heat-treated martensitic stainless-steel grade has improved mechanical and tribological properties while heat-treated austenitic stainless-steel grades showed deteriorated wear resistance. The radiation shielding parameters of the studied grades are comparable. The effectiveness of heat treatment in the presence of NaCl solution is verified.
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Affiliation(s)
- Samah A Al-Shelkamy
- Physics Department, Faculty of Science, New Valley University, New Valley, El-Kharga, 72511, Egypt.
| | - Hassan M Abu Hashish
- Mechanical Engineering Department, Engineering Research Institute and Renewable Energy, National Research Centre, Giza, 12622, Egypt
| | - E Salama
- Basic Science Department, Faculty of Engineering, The British University in Egypt (BUE), Egypt
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