Evaluation of radiation shielding properties of the polyvinyl alcohol/iron oxide polymer composite
Context: Lead is the conventional shielding material against gamma/X-rays. It has some limitations such as toxic, high density, nonflexibility, and also bremsstrahlung production during electron interaction. It may affect the accuracy of radiotherapy outcome. Aims: To theoretically analyze the radia...
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2017-01-01
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| Series: | Journal of Medical Physics |
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| Online Access: | http://www.jmp.org.in/article.asp?issn=0971-6203;year=2017;volume=42;issue=4;spage=273;epage=278;aulast=Srinivasan |
| _version_ | 1811230781892198400 |
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| author | K Srinivasan E James Jabaseelan Samuel |
| author_facet | K Srinivasan E James Jabaseelan Samuel |
| author_sort | K Srinivasan |
| collection | DOAJ |
| description | Context: Lead is the conventional shielding material against gamma/X-rays. It has some limitations such as toxic, high density, nonflexibility, and also bremsstrahlung production during electron interaction. It may affect the accuracy of radiotherapy outcome. Aims: To theoretically analyze the radiation shielding properties of flexible polyvinyl alcohol/iron oxide polymer composite with five different concentrations of magnetite over the energy range of 15 KeV–20 MeV. Subjects and Methods: Radiological properties were calculated based on the published literature. Attenuation coefficients of pure elements are generated with the help of WinXCOM database. Results: Effective atomic numbers and electron density are increased with the concentration of magnetite. On the other hand, the number of electrons per gram decreased. Mass attenuation coefficient (μ/ϼ) and linear attenuation coefficients (μ) are higher in the lower energy <100 KeV, and their values decreased when the energy increased. Computed tomography numbers (CT) show the significant variation between the concentrations in <60 KeV. Half-value layer and tenth-value layers are directly proportional to the energy and indirectly proportional to the concentration of magnetite. Transmission curve, relaxation length (ƛ), kinetic energy released in the matter, and elemental weight fraction are also calculated and the results are discussed. Conclusions: 0.5% of the magnetite gives superior shielding properties compared with other concentrations. It may be due to the presence of 0.3617% of Fe. Elemental weight fraction, atomic number, photon energy, and mass densities are the important parameters to understand the shielding behavior of any material. |
| first_indexed | 2024-04-12T10:33:53Z |
| format | Article |
| id | doaj.art-a389ea6890344f49822228b6c7408633 |
| institution | Directory Open Access Journal |
| issn | 0971-6203 1998-3913 |
| language | English |
| last_indexed | 2024-04-12T10:33:53Z |
| publishDate | 2017-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Journal of Medical Physics |
| spelling | doaj.art-a389ea6890344f49822228b6c74086332022-12-22T03:36:46ZengWolters Kluwer Medknow PublicationsJournal of Medical Physics0971-62031998-39132017-01-0142427327810.4103/jmp.JMP_54_17Evaluation of radiation shielding properties of the polyvinyl alcohol/iron oxide polymer compositeK SrinivasanE James Jabaseelan SamuelContext: Lead is the conventional shielding material against gamma/X-rays. It has some limitations such as toxic, high density, nonflexibility, and also bremsstrahlung production during electron interaction. It may affect the accuracy of radiotherapy outcome. Aims: To theoretically analyze the radiation shielding properties of flexible polyvinyl alcohol/iron oxide polymer composite with five different concentrations of magnetite over the energy range of 15 KeV–20 MeV. Subjects and Methods: Radiological properties were calculated based on the published literature. Attenuation coefficients of pure elements are generated with the help of WinXCOM database. Results: Effective atomic numbers and electron density are increased with the concentration of magnetite. On the other hand, the number of electrons per gram decreased. Mass attenuation coefficient (μ/ϼ) and linear attenuation coefficients (μ) are higher in the lower energy <100 KeV, and their values decreased when the energy increased. Computed tomography numbers (CT) show the significant variation between the concentrations in <60 KeV. Half-value layer and tenth-value layers are directly proportional to the energy and indirectly proportional to the concentration of magnetite. Transmission curve, relaxation length (ƛ), kinetic energy released in the matter, and elemental weight fraction are also calculated and the results are discussed. Conclusions: 0.5% of the magnetite gives superior shielding properties compared with other concentrations. It may be due to the presence of 0.3617% of Fe. Elemental weight fraction, atomic number, photon energy, and mass densities are the important parameters to understand the shielding behavior of any material.http://www.jmp.org.in/article.asp?issn=0971-6203;year=2017;volume=42;issue=4;spage=273;epage=278;aulast=SrinivasanHalf-value layermass attenuation coefficientpolymer compositerelaxation lengthshielding properties |
| spellingShingle | K Srinivasan E James Jabaseelan Samuel Evaluation of radiation shielding properties of the polyvinyl alcohol/iron oxide polymer composite Journal of Medical Physics Half-value layer mass attenuation coefficient polymer composite relaxation length shielding properties |
| title | Evaluation of radiation shielding properties of the polyvinyl alcohol/iron oxide polymer composite |
| title_full | Evaluation of radiation shielding properties of the polyvinyl alcohol/iron oxide polymer composite |
| title_fullStr | Evaluation of radiation shielding properties of the polyvinyl alcohol/iron oxide polymer composite |
| title_full_unstemmed | Evaluation of radiation shielding properties of the polyvinyl alcohol/iron oxide polymer composite |
| title_short | Evaluation of radiation shielding properties of the polyvinyl alcohol/iron oxide polymer composite |
| title_sort | evaluation of radiation shielding properties of the polyvinyl alcohol iron oxide polymer composite |
| topic | Half-value layer mass attenuation coefficient polymer composite relaxation length shielding properties |
| url | http://www.jmp.org.in/article.asp?issn=0971-6203;year=2017;volume=42;issue=4;spage=273;epage=278;aulast=Srinivasan |
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