A Comprehensive study of the exposure and energy absorption buildup factors in some polymer composites for point isotropic Source, including the effect of bremsstrahlung
{"title":"A Comprehensive study of the exposure and energy absorption buildup factors in some polymer composites for point isotropic Source, including the effect of bremsstrahlung","authors":"","doi":"10.1016/j.nimb.2024.165552","DOIUrl":null,"url":null,"abstract":"<div><div>The exposure (EBF) and energy absorption buildup factors (EABF) of different polymer composites (SiW, PHEMA-WO<sub>3</sub>, CaWO<sub>4</sub>, EWO<sub>3</sub>, BaTiO<sub>3</sub>, PbCl<sub>2</sub>) has been investigated for photon isotropic source with the energy range of 0.015–15 MeV and the penetration depth of 1–10 mean free path(mfp). Furthermore, the contribution of bremsstrahlung effect on selected polymer composites EBF has been discussed. Simulations were performed by MCNPX Monte Carlo code. Model validation was carried out by comparing theoretical uncollided flux and EBF of water with similar published data. The results indicate that EBF and EABF values are dependent on the incident photon energy and the depth of penetration. The maximum and minimum values of EBF and EABF are related to BaTiO<sub>3</sub> and SiW, respectively. Moreover, it is observed that considering bremsstrahlung increases values, especially at energies greater than 3 MeV.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0168583X24003227","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"INSTRUMENTS & INSTRUMENTATION","Score":null,"Total":0}
引用次数: 0
Abstract
The exposure (EBF) and energy absorption buildup factors (EABF) of different polymer composites (SiW, PHEMA-WO3, CaWO4, EWO3, BaTiO3, PbCl2) has been investigated for photon isotropic source with the energy range of 0.015–15 MeV and the penetration depth of 1–10 mean free path(mfp). Furthermore, the contribution of bremsstrahlung effect on selected polymer composites EBF has been discussed. Simulations were performed by MCNPX Monte Carlo code. Model validation was carried out by comparing theoretical uncollided flux and EBF of water with similar published data. The results indicate that EBF and EABF values are dependent on the incident photon energy and the depth of penetration. The maximum and minimum values of EBF and EABF are related to BaTiO3 and SiW, respectively. Moreover, it is observed that considering bremsstrahlung increases values, especially at energies greater than 3 MeV.
期刊介绍:
Section B of Nuclear Instruments and Methods in Physics Research covers all aspects of the interaction of energetic beams with atoms, molecules and aggregate forms of matter. This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for these studies. Topics of general interest include: atomic collisions in solids, particle channelling, all aspects of collision cascades, the modification of materials by energetic beams, ion implantation, irradiation - induced changes in materials, the physics and chemistry of beam interactions and the analysis of materials by all forms of energetic radiation. Modification by ion, laser and electron beams for the study of electronic materials, metals, ceramics, insulators, polymers and other important and new materials systems are included. Related studies, such as the application of ion beam analysis to biological, archaeological and geological samples as well as applications to solve problems in planetary science are also welcome. Energetic beams of interest include atomic and molecular ions, neutrons, positrons and muons, plasmas directed at surfaces, electron and photon beams, including laser treated surfaces and studies of solids by photon radiation from rotating anodes, synchrotrons, etc. In addition, the interaction between various forms of radiation and radiation-induced deposition processes are relevant.