Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms最新文献_第2页

Do the laser-printed 3D-structures withstand the X-ray synchrotron radiation beam? 激光打印的三维结构能否承受 X 射线同步辐射光束？

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2024-11-12 DOI: 10.1016/j.nimb.2024.165559

M. Danilkin , A. Vitukhnovsky , D. Kolymagin , E. Perevedentseva , A. Gritsienko , Yu. Tokunov , I. Zakharchuk , A. Patolyatov , A. Primenko , G. Prutskov

{"title":"Do the laser-printed 3D-structures withstand the X-ray synchrotron radiation beam?","authors":"M. Danilkin , A. Vitukhnovsky , D. Kolymagin , E. Perevedentseva , A. Gritsienko , Yu. Tokunov , I. Zakharchuk , A. Patolyatov , A. Primenko , G. Prutskov","doi":"10.1016/j.nimb.2024.165559","DOIUrl":"10.1016/j.nimb.2024.165559","url":null,"abstract":"<div><div>The radiation stability of polymer objects fabricated by direct laser writing is studied. Two groups of 6 cubes (<span><math><mrow><mn>50</mn><mo>×</mo><mn>50</mn><mo>×</mo><mn>50</mn><mspace></mspace><mi>μ</mi></mrow></math></span>m<span><math><msup><mrow></mrow><mrow><mn>3</mn></mrow></msup></math></span>) were printed on a common silicon substrate, with laser power and slicing step uniformly varied from cube to cube in both groups. One group was X-rayed in the synchrotron radiation beam (12 keV, <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>10</mn></mrow></msup></mrow></math></span> photons/mm<span><math><msup><mrow></mrow><mrow><mn>2</mn></mrow></msup></math></span>/s, <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>13</mn></mrow></msup></mrow></math></span> photons per each cube), another kept non-irradiated for the reference. The air kerma (<span><math><mo>∼</mo></math></span>2000 kGy) near cubes and the radiation dose absorbed in each cube (<span><math><mo>∼</mo></math></span>1.4 kGy) were calculated. The latter was verified using thermoluminescent detectors. The radiation effects were observed with a scanning electron microscope and with an optical 3D surface profilometer, also evaluated by Raman spectroscopy. An enhanced cross-linking in the polymer is the primary effect which may draw together the neighboring printed layers thus distorting the laser-printed object; distortions can be avoided by making objects with proper laser power and slicing step.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"558 ","pages":"Article 165559"},"PeriodicalIF":1.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142661242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

GEANT4 simulation for controlling and focusing of laser-accelerated proton beam for particle therapy using pulsed power solenoids 利用脉冲功率电磁铁控制和聚焦用于粒子治疗的激光加速质子束的 GEANT4 仿真

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2024-11-10 DOI: 10.1016/j.nimb.2024.165563

S.A. Mahdipour , M. Shafeei Sarvestani

{"title":"GEANT4 simulation for controlling and focusing of laser-accelerated proton beam for particle therapy using pulsed power solenoids","authors":"S.A. Mahdipour , M. Shafeei Sarvestani","doi":"10.1016/j.nimb.2024.165563","DOIUrl":"10.1016/j.nimb.2024.165563","url":null,"abstract":"<div><div>Laser-accelerated proton beams (LAP) have inspired innovative applications that can leverage proton bunch properties distinct from those of conventionally accelerated proton beams. A new multifunctional LAP beamline has been proposed, utilizing the GEANT4 toolkit, and the solenoids have been simulated using high-precision components.</div><div>We present the design of the initial segment of the transport beamline and energy selection system for the effective transport of a radiation pressure acceleration source with a high energy spread. This study examines the effects of solenoids on proton beam quality, specifically focusing on profiles, FWHM, and transmission efficiency. The results obtained using our developed GEANT4 toolkit validate the analytical formulas and findings from the DYNAMION code regarding emittance and proton profiles. Additionally, the presented GEANT4 LAP beamline is capable of calculating the flux of secondary particles, such as neutrons and photons. It was observed that careful attention to the precise structure of the solenoids is critical.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"558 ","pages":"Article 165563"},"PeriodicalIF":1.4,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142661254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Near-infrared study of radiation damage in ion-irradiated cerium dioxide and cerium-gadolinium dioxide 离子辐照二氧化铈和二氧化钆铈中辐射损伤的近红外研究

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2024-11-10 DOI: 10.1016/j.nimb.2024.165567

Jean-Marc Costantini , Maxime Guillaumet , Gérald Lelong , Norito Ishikawa , Pooreun Seo , Kazuhiro Yasuda

{"title":"Near-infrared study of radiation damage in ion-irradiated cerium dioxide and cerium-gadolinium dioxide","authors":"Jean-Marc Costantini , Maxime Guillaumet , Gérald Lelong , Norito Ishikawa , Pooreun Seo , Kazuhiro Yasuda","doi":"10.1016/j.nimb.2024.165567","DOIUrl":"10.1016/j.nimb.2024.165567","url":null,"abstract":"<div><div>Radiation damage is studied in ion-irradiated sintered CeO<sub>2</sub> and (Ce, Gd)O<sub>2-x</sub> samples. Near Infra-red (NIR) spectra were recorded at room temperature for wavenumbers between 2800 and 11,000 cm<sup>−1</sup> (i.e. ∼0.9–3.57 µm in wavelength and ∼0.35–1.36 eV in photon energy). Measurements were carried out by using the diffuse reflectivity mode for all of these sintered samples. Samples were irradiated with 100-MeV Kr, 200-MeV Xe, and 36-MeV W ions up to 1 × 10<sup>14</sup> cm<sup>−2</sup>. A sintered (Ce, Gd)O<sub>2-x</sub> sample for 5 mol% Gd<sub>2</sub>O<sub>3</sub> was also irradiated with 12-MeV Ar ions at 2 × 10<sup>14</sup> cm<sup>−2</sup>. Four broad absorption bands centered at 3700, 4100, 6000, and 7600 cm<sup>−1</sup> (i.e. ∼0.46, 0.51, 0.74, and 0.94 eV) are deduced from fits of the FTIR spectra for the ion-irradiated sintered CeO<sub>2</sub> and (Ce, Gd)O<sub>2-x</sub> samples accompanied by a change in color from ivory to green. No such bands are recorded for the virgin (Ce, Gd)O<sub>2-x</sub> samples with 5, 10, and 15 mol% Gd<sub>2</sub>O<sub>3</sub> with an increasing amount of oxygen vacancies. Absorption bands are tentatively assigned to electronic transitions involving cerium vacancy levels in the band gap, also observed under high-energy electron irradiation. The possible effects of either electronic excitations or nuclear collisions in this damage process are discussed.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"558 ","pages":"Article 165567"},"PeriodicalIF":1.4,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142661253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a versatile plate spectrometer for electron beam characterization 开发用于电子束特征描述的多功能平板光谱仪

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2024-11-08 DOI: 10.1016/j.nimb.2024.165550

S.L. Henderson, K. Smith, D. Walter, B. Carlsten, N. Dallmann

引用次数: 0

Differential cross section measurements of the 7Li(3He, p0)9Be, 7Li(3He, p2)9Be, and 7Li(3He, d0)8Be reactions from 2 to 4 MeV 2 至 4 MeV 的 7Li(3He，p0)9Be、7Li(3He，p2)9Be 和 7Li(3He，d0)8Be 反应的差分截面测量结果

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2024-11-07 DOI: 10.1016/j.nimb.2024.165564

C. López Pérez , K.B. Woller

{"title":"Differential cross section measurements of the 7Li(3He, p0)9Be, 7Li(3He, p2)9Be, and 7Li(3He, d0)8Be reactions from 2 to 4 MeV","authors":"C. López Pérez , K.B. Woller","doi":"10.1016/j.nimb.2024.165564","DOIUrl":"10.1016/j.nimb.2024.165564","url":null,"abstract":"<div><div>The use of lithium in plasma facing components (PFCs) for fusion reactors is increasingly more prominent due to its ability to enhance plasma performance and potential to protect the underlying high-Z PFCs. In order to use nuclear reaction analysis (NRA) to investigate lithium depth profiles in fusion relevant experiments such as hydrogen retention in lithiated PFCs, there is a need for experimental measurements of the cross section of the reactions of interest over a wide range of energies and in a scattering angle in which the differential cross sections of other relevant species, such as deuterium and oxygen, have been measured. In this paper we report the differential cross sections of the <sup>7</sup>Li(<sup>3</sup>He<em>,</em> p<sub>0</sub>)<sup>9</sup>Be, <sup>7</sup>Li(<sup>3</sup>He<em>,</em> p<sub>2</sub>)<sup>9</sup>Be, and <sup>7</sup>Li(<sup>3</sup>He<em>,</em> d<sub>0</sub>)<sup>8</sup>Be reactions from 2 to 3.919 MeV at a measurement angle of 135°. The measurements were performed on a lithium fluoride film target with the <sup>7</sup>Li areal density determined using the <sup>7</sup>Li(p<em>, α</em>)<sup>4</sup>He reaction at 2 MeV and 150°.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"558 ","pages":"Article 165564"},"PeriodicalIF":1.4,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142661240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stopping of very heavy ions in Mylar 阻止迈拉尔中的超重离子

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2024-11-02 DOI: 10.1016/j.nimb.2024.165554

R.N. Sagaidak

{"title":"Stopping of very heavy ions in Mylar","authors":"R.N. Sagaidak","doi":"10.1016/j.nimb.2024.165554","DOIUrl":"10.1016/j.nimb.2024.165554","url":null,"abstract":"<div><div>Available experimental data on Mylar stopping powers (<span><math><mrow><mi>S</mi><mi>P</mi></mrow></math></span>s) for heavy ions (HIs) at energies <span><math><mrow><mn>0</mn><mo>.</mo><mn>04</mn><mo>⩽</mo><mi>E</mi><mo>/</mo><mi>A</mi><mo>⩽</mo><mn>15</mn></mrow></math></span> MeV/nucleon have been compared to different semi-empirical model calculations with the aim of probing their possible usage for the estimates of ranges for very heavy ions at <span><math><mrow><mi>E</mi><mo>/</mo><mi>A</mi><mo><</mo><mn>0</mn><mo>.</mo><mn>5</mn></mrow></math></span> MeV/nucleon, which are of practical interest. Significant deviations from the calculated <span><math><mrow><mi>S</mi><mi>P</mi></mrow></math></span> values were found for fission fragments and lighter HIs at <span><math><mrow><mi>E</mi><mo>/</mo><mi>A</mi><mo><</mo><mn>1</mn></mrow></math></span> MeV/nucleon. A new model parameterization for Mylar <span><math><mrow><mi>S</mi><mi>P</mi></mrow></math></span> has been proposed. Range estimates obtained with any <span><math><mrow><mi>S</mi><mi>P</mi></mrow></math></span> model calculation show a critical dependence of their mean values on the approximated electronic stopping powers and the nuclear (collisional) <span><math><mrow><mi>S</mi><mi>P</mi></mrow></math></span> component. The last plays a crucial role at the end of the range and could only be obtained by calculations. Practical applicability of the results of investigation for very heavy evaporation residues (products of complete fusion reactions induced by HIs) implies the use of a thick catcher foil corresponding to the largest ranges derived in the estimates or the range measurements for these products.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"557 ","pages":"Article 165554"},"PeriodicalIF":1.4,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Forward and backward emission of secondary ions from biomolecules on single-layer graphene by MeV Cn+ (n = 1–6) impacts 单层石墨烯上的生物大分子在 MeV Cn+（n = 1-6）冲击下向前和向后发射二次离子

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2024-11-02 DOI: 10.1016/j.nimb.2024.165548

Naruki Uno , Takuya Majima , Manabu Saito , Kaoru Nakajima , Hidetsugu Tsuchida

{"title":"Forward and backward emission of secondary ions from biomolecules on single-layer graphene by MeV Cn+ (n = 1–6) impacts","authors":"Naruki Uno , Takuya Majima , Manabu Saito , Kaoru Nakajima , Hidetsugu Tsuchida","doi":"10.1016/j.nimb.2024.165548","DOIUrl":"10.1016/j.nimb.2024.165548","url":null,"abstract":"<div><div>We studied the emission of secondary ions using a cluster ion with MeV energy in transmission secondary ion mass spectrometry. The primary ions used were 0.6 MeV/atom C<em><sub>n</sub></em><sup>+</sup>, where <em>n</em> ranges from 1 to 6. Single-layer graphene was used as a support membrane for depositing a biomolecular target of phenylalanine. Positive secondary ions emitted in both forward and backward directions were measured separately. We found that the yield of forward-emitted secondary ions was higher than that of backward-emitted secondary ions. Our results showed that the yield of secondary ions emitted in both directions increased as the size of incident cluster ions increased. This increase was non-linear and can be attributed to the track overlap effect of incident cluster ions. We also found a scaling parameter consistently describing the incident cluster size dependence of the forward and backward-emitted secondary ion yields.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"557 ","pages":"Article 165548"},"PeriodicalIF":1.4,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gamma irradiation effect on the structural and optical properties of manganese (III) phthalocyanine chloride films: Experimental and theoretical approach for optoelectronic applications 伽马辐照对氯化锰（III）酞菁薄膜的结构和光学特性的影响：光电应用的实验和理论方法

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2024-11-01 DOI: 10.1016/j.nimb.2024.165556

E.F.M. El-Zaidia , A.A.A. Darwish , Shaaban A. Elroby , A.M. Hassanien

{"title":"Gamma irradiation effect on the structural and optical properties of manganese (III) phthalocyanine chloride films: Experimental and theoretical approach for optoelectronic applications","authors":"E.F.M. El-Zaidia , A.A.A. Darwish , Shaaban A. Elroby , A.M. Hassanien","doi":"10.1016/j.nimb.2024.165556","DOIUrl":"10.1016/j.nimb.2024.165556","url":null,"abstract":"<div><div>Irradiation using ionizing radiation such as gamma-ray alters the material characteristics of organic semiconductors, especially the optical and electronic properties. The potential changes of manganese phthalocyanine chloride (MnPcCl) films have been investigated after several gamma irradiation doses (50, 150, and 250 kGy). The possible chemical structure and electronic characteristics of MnPcCl dye were analyzed using the density functional theory-based quantum calculations. The X-ray diffraction of various gamma-ray doses confirmed the amorphous nature of MnPcCl. Based on UV–Vis-NIR spectrophotometric measurements, Tauc’s method has been used to deduce the optical bandgap energy of MnPcCl films before and after γ-irradiation. A slight non-linear reduction was observed in the optical bandgap energy, refractive index, and dielectric constant with rising γ-irradiation doses. The reduction in these optical parameters was due to the increase in the defects and the disorder degree created by γ-irradiation. The low effect on the optical parameters of MnPcCl films confirms its optical stability within this high range of γ-irradiation doses. Such investigation highlights the scope for the stability of this organic dye after exposure to γ-irradiation doses for use in optoelectronic/photonic technological devices.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"557 ","pages":"Article 165556"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reevaluation of neutron energy spectrum in Heavy-Water neutron irradiation facility of Kyoto University research Reactor using multifoil activation method 利用多线圈活化法重新评估京都大学研究用反应堆重水中子辐照设施的中子能谱

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2024-11-01 DOI: 10.1016/j.nimb.2024.165555

Jakkrit Prateepkaew , Yoshinori Sakurai

{"title":"Reevaluation of neutron energy spectrum in Heavy-Water neutron irradiation facility of Kyoto University research Reactor using multifoil activation method","authors":"Jakkrit Prateepkaew , Yoshinori Sakurai","doi":"10.1016/j.nimb.2024.165555","DOIUrl":"10.1016/j.nimb.2024.165555","url":null,"abstract":"<div><div>The Heavy-Water Thermal Neutron Facility at Kyoto University Research Reactor (KUR) has been operational for boron neutron capture therapy (BNCT) since May 1974. Following a facility construction update in 1996, the facility name was changed to the Heavy-Water Neutron Irradiation Facility (HWNIF), and the neutron energy spectra were evaluated using the multifoil activation method. In May 2010, the KUR transitioned its operations from high-enrichment fuel to low-enrichment fuel. However, the neutron energy spectrum in the KUR-HWNIF has not been reevaluated with high accuracy since then. This paper reports the reevaluation of the neutron energy spectrum for the standard epithermal-neutron irradiation mode using the multifoil activation method. Based on the reevaluated results, the epithermal- and fast-neutron fluxes increased by approximately 34 % and 19 %, respectively. The neutron absorption dose rate at evaluation point was approximately 17 % lower than the previous one; however, it remained acceptable from the perspective of BNCT biological irradiation.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"557 ","pages":"Article 165555"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Comprehensive study of the exposure and energy absorption buildup factors in some polymer composites for point isotropic Source, including the effect of bremsstrahlung 点各向同性源某些聚合物复合材料的暴露和能量吸收累积因子综合研究，包括轫致辐射的影响

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2024-11-01 DOI: 10.1016/j.nimb.2024.165552

Keyhandokht Karimi-Shahri , Yasaman Rezaei Moghaddam , Parisa Akhlaghi , Najmeh Mohammadi , Atiyeh Ebrahimi-Khankook

{"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":"Keyhandokht Karimi-Shahri , Yasaman Rezaei Moghaddam , Parisa Akhlaghi , Najmeh Mohammadi , Atiyeh Ebrahimi-Khankook","doi":"10.1016/j.nimb.2024.165552","DOIUrl":"10.1016/j.nimb.2024.165552","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":"557 ","pages":"Article 165552"},"PeriodicalIF":1.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0