发布求助
文献互助 智能选刊 最新文献

Applied Radiation and Isotopes最新文献

筛选
英文 中文
Cross section measurements for the production of 49,51Cr and 47Sc from proton irradiation of natural vanadium up to 24 MeV 质子辐照天然钒至 24 MeV 产生 49、51Cr 和 47Sc 的截面测量。
IF 1.6 3区 工程技术
Applied Radiation and Isotopes Pub Date : 2024-08-06 DOI: 10.1016/j.apradiso.2024.111469
{"title":"Cross section measurements for the production of 49,51Cr and 47Sc from proton irradiation of natural vanadium up to 24 MeV","authors":"","doi":"10.1016/j.apradiso.2024.111469","DOIUrl":"10.1016/j.apradiso.2024.111469","url":null,"abstract":"<div><p>Scandium-47 is a promising radionuclide for targeted radiotherapy and is also an elementally matched therapeutic partner to <sup>43</sup>Sc and <sup>44</sup>Sc, which are suitable for Positron Emission Tomography. The predominantly reported routes for the production of <sup>47</sup>Sc employ expensive enriched titanium or calcium targets to achieve high radionuclidic purity. This study reports measurements of the excitation function of the <sup>nat</sup>V(p,x)<sup>47</sup>Sc reaction at proton energies of 18–24 MeV to optimize bombardment parameters for the production of <sup>47</sup>Sc using this promising approach. The cross-sections reported here demonstrate that irradiation of vanadium targets can produce &gt;99% radionuclidically pure <sup>47</sup>Sc with a proton energy of 24 MeV, albeit at modest yields.</p></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141995125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Small ion pulse ionization chamber for radon measurement in underground space 用于地下空间氡测量的小型离子脉冲电离室
IF 1.6 3区 工程技术
Applied Radiation and Isotopes Pub Date : 2024-08-05 DOI: 10.1016/j.apradiso.2024.111467
{"title":"Small ion pulse ionization chamber for radon measurement in underground space","authors":"","doi":"10.1016/j.apradiso.2024.111467","DOIUrl":"10.1016/j.apradiso.2024.111467","url":null,"abstract":"<div><p>Radon, prevalent in underground spaces, requires continuous monitoring due to health risks. Traditional detectors are often expensive, bulky, and ill-suited for humid environments in underground spaces. This study presents a compact, cost-effective radon detector designed for long-term, online monitoring. It uses a small ionization chamber with natural airflow, avoiding the need for fans or pumps, and includes noise filtering and humidity mitigation. Featuring multi-point networking and easy integration capabilities, this detector significantly enhances radon monitoring in challenging, underground conditions.</p></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141998069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A study on neutron emission for proton-induced reactions in 90Zr, 91Zr, and 115In isotopes 关于 90Zr、91Zr 和 115In 同位素中质子诱导反应的中子发射的研究。
IF 1.6 3区 工程技术
Applied Radiation and Isotopes Pub Date : 2024-08-05 DOI: 10.1016/j.apradiso.2024.111468
{"title":"A study on neutron emission for proton-induced reactions in 90Zr, 91Zr, and 115In isotopes","authors":"","doi":"10.1016/j.apradiso.2024.111468","DOIUrl":"10.1016/j.apradiso.2024.111468","url":null,"abstract":"<div><p>Fusion energy heralds the potential of a transformative era, offering a significant solution to global challenges such as climate change, ozone depletion and environmental pollution. Despite its promising prospects, the commercialization of fusion faces several challenges, including high temperature, pressure, plasma stability, fuel supply, costs, etc. It is important to effectively analyze material behavior under plasma conditions, especially in environments where fusion reactions produce high-energy particles such as neutrons. This study investigates the angle-dependent neutron production mechanisms of proton-induced reactions involving the isotopes <sup>90</sup>Zr, <sup>91</sup>Zr and <sup>115</sup>In, which are widely used in fusion reactor materials. Using the Monte Carlo codes PHITS 3.32 and FLUKA, as well as the TALYS 1.96 code, double differential cross-section calculations for neutron emission were performed considering various angles. The research contributes to a broader understanding of fusion processes by providing insights into the behavior of these isotopes under proton-induced reactions.</p></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141905655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental investigation of gamma-ray interaction parameters and buildup factors in lanthanide compounds: Insights into penetration depth 镧系化合物中伽马射线相互作用参数和积聚因子的实验研究：洞察穿透深度。
IF 1.6 3区 工程技术
Applied Radiation and Isotopes Pub Date : 2024-08-03 DOI: 10.1016/j.apradiso.2024.111466
{"title":"Experimental investigation of gamma-ray interaction parameters and buildup factors in lanthanide compounds: Insights into penetration depth","authors":"","doi":"10.1016/j.apradiso.2024.111466","DOIUrl":"10.1016/j.apradiso.2024.111466","url":null,"abstract":"<div><p>This experimental investigation focuses on the gamma-ray interaction parameters and the buildup factor in lanthanide compounds (CeO<sub>2</sub>, Ce(SO<sub>4</sub>)<sub>2</sub>, Dy<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>, C<sub>3</sub>O<sub>9</sub>Sm<sub>2</sub>, C<sub>3</sub>Gd<sub>2</sub>O<sub>9</sub>, Pr<sub>2</sub>O<sub>3</sub>). These compounds were exposed to weak radioactive gamma sources with energies of 356, 511, 662, 1173, 1275, and 1332 keV by adopting narrow and broad beam geometry experimental arrangements. The incident and transmitted radiation intensities were measured using a NaI (Tl) detector. Experimentally measured values of mass attenuation coefficient and effective atomic number of lanthanide compounds were found to be in precise agreement with theoretical values obtained from NIST XCOM and Direct-Z<sub>eff</sub> database respectively. Additionally, the experimentally determined buildup factor values were compared with energy absorption buildup factor (EABF) and exposure buildup factor (EBF) values obtained from Phy-X/PSD software, providing insights into the gamma-ray penetration depth in terms of mean free path (MFP). At 356 keV, the EABF analysis showed that most compounds had a penetration depth of around 8 mean free paths. In contrast, the EBF analysis indicated penetration depths exceeding 10 mean free paths for all compounds except Ce (SO<sub>4</sub>)<sub>2</sub>. This new approach holds immense potential for transformative advancements in medical diagnostics, therapy, and the development of innovative technologies in nuclear sciences.</p></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141911478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Non-empirical peak shape methods based on the physical model of the one trap one recombination center model 基于一阱一重组中心物理模型的非经验峰形方法。
IF 1.6 3区 工程技术
Applied Radiation and Isotopes Pub Date : 2024-08-03 DOI: 10.1016/j.apradiso.2024.111463
{"title":"Non-empirical peak shape methods based on the physical model of the one trap one recombination center model","authors":"","doi":"10.1016/j.apradiso.2024.111463","DOIUrl":"10.1016/j.apradiso.2024.111463","url":null,"abstract":"<div><p>Any experimental Thermoluminescent (TL) glow-peak contains the activation energy information of its corresponding energy level within the band gap in insulating materials. The theory of peak shape methods (PSM) correlates the macroscopic geometrical characteristics of a single TL peak with activation energy of the level responsible for the TL peak by assuming that the area under a TL peak can be approximated by the area of a triangle. In this way the geometrical characteristics becomes the measure of the activation energy. In the present work new PSM expressions are derived, which are not empirical as the existing ones but are based of the physical model of one trap one recombination (OTOR) center. Three cases are considered. (I) Delocalized OTOR for re-trapping probability smaller than the recombination probability. (II) Delocalized OTOR for re-trapping probability greater than recombination probability. (III) Localized transitions OTOR model. The system of differential equations of each case model were solved analytically using the Lambert <span><math><mi>W</mi></math></span> function (or equivalently the Wright <span><math><mi>ω</mi></math></span> function). Then the resulted analytical expressions of TL intensity as a function of temperature were used to derive new PSM. The new PSM from all cases are formally exactly the same, having, however, strong differentiation in their coefficients. The functionality of the new expressions is tested and its comparison with pre-existing PSM is performed.</p></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141911479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of the CIEMAT/NIST method to 14C low-level measurements 将 CIEMAT/NIST 方法应用于 14C 低水平测量。
IF 1.6 3区 工程技术
Applied Radiation and Isotopes Pub Date : 2024-08-03 DOI: 10.1016/j.apradiso.2024.111465
{"title":"Application of the CIEMAT/NIST method to 14C low-level measurements","authors":"","doi":"10.1016/j.apradiso.2024.111465","DOIUrl":"10.1016/j.apradiso.2024.111465","url":null,"abstract":"<div><p>Radiocarbon dating of samples from benzene synthesis by low-level Liquid Scintillation Counting (LSC) method requires the availability of <sup>14</sup>C standards in benzene, which are difficult to obtain, or the use of an absolute measurement which is out of reach for most analytical laboratories. This paper describes how the CIEMAT/NIST method can help to solve this issue and presents the measurements of low activity concentrations performed in the LRI-D using two different benzene base scintillator cocktails.</p></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0969804324002938/pdfft?md5=967ac788228adb210d1b02197306aa05&pid=1-s2.0-S0969804324002938-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141892642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Total excitation energy distribution for neutron-induced fission and photo-fission of uranium isotopes 铀同位素中子诱发裂变和光裂变的总激发能量分布
IF 1.6 3区 工程技术
Applied Radiation and Isotopes Pub Date : 2024-08-03 DOI: 10.1016/j.apradiso.2024.111464
{"title":"Total excitation energy distribution for neutron-induced fission and photo-fission of uranium isotopes","authors":"","doi":"10.1016/j.apradiso.2024.111464","DOIUrl":"10.1016/j.apradiso.2024.111464","url":null,"abstract":"<div><p>The fission fragment total excitation energy, TXE(A), is investigated for neutron-induced fission of uranium isotopes using three different methods. Different methods for calculations of the TXE(A) produced by the decay of low excited systems are analyzed and their results are compared with the available TXE values. The calculated TXE values have been compared with the results of other studies for the neutron induced fission of <sup>233</sup>U, <sup>235</sup>U as well as the photo-fission of <sup>238</sup>U. The scission point method for evaluating TXE has been modified by comparing the available and calculated results. TXE(A) is evaluated for other uranium isotopes using three methods. It is found that TXE values in the neutron induced fission of <sup>233</sup>U, <sup>235</sup>U and the photo-fission of <sup>238</sup>U are greater than the calculated TXE values of other uranium isotopes. The TXE values of light uranium isotopes decrease with increasing their mass numbers, while the TXE values of heavy uranium isotopes increase as their mass numbers increase. Also, the calculated TXE values for all isotopes increase sharply near the symmetric region, which is due to the formation of unstable fission fragment. On the other hand, a slight increase in neutron multiplicity and TXE values can be observed in heavy fission fragments (<span><math><mrow><msub><mrow><mi>A</mi></mrow><mrow><mi>h</mi></mrow></msub><mo>&gt;</mo></mrow></math></span>155), which could be due to the neutron excess. However, the sharp increase in neutron multiplicity and TXE values in some studies for the heavy fission fragments (<span><math><mrow><msub><mrow><mi>A</mi></mrow><mrow><mi>h</mi></mrow></msub><mo>&gt;</mo></mrow></math></span>155) is due to a missing correction in the data analysis.</p></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141993871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Radiochemical neutron activation analysis of elemental contents in crude phosphoric acid samples and studies on adsorption removal of these elements using synthesized bionanocomposites 粗磷酸样品中元素含量的放射化学中子活化分析以及利用合成的仿生复合材料吸附去除这些元素的研究
IF 1.6 3区 工程技术
Applied Radiation and Isotopes Pub Date : 2024-08-02 DOI: 10.1016/j.apradiso.2024.111462
{"title":"Radiochemical neutron activation analysis of elemental contents in crude phosphoric acid samples and studies on adsorption removal of these elements using synthesized bionanocomposites","authors":"","doi":"10.1016/j.apradiso.2024.111462","DOIUrl":"10.1016/j.apradiso.2024.111462","url":null,"abstract":"<div><p>Harmful elements in Egyptian phosphoric acid were identified by radiochemical neutron activation analysis. In the Second Egyptian Nuclear Research Reactor, precipitates were created and examined to identify many types of contaminants (Ce, Co, Cr, etc.). New bionanocomposite materials effectively removed with a high proportion each of Ce, Th, Pa, U, Np, Zn, and Co (100%) and a somewhat lower percentage (65–85%) for Cr, Sc, and Fe from simulated solutions, suggesting promise for purifying phosphoric acid.</p></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141942062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development and evaluation of a radiolabelling agent for white blood cell scans 开发和评估用于白细胞扫描的放射性标记剂
IF 1.6 3区 工程技术
Applied Radiation and Isotopes Pub Date : 2024-07-31 DOI: 10.1016/j.apradiso.2024.111460
{"title":"Development and evaluation of a radiolabelling agent for white blood cell scans","authors":"","doi":"10.1016/j.apradiso.2024.111460","DOIUrl":"10.1016/j.apradiso.2024.111460","url":null,"abstract":"<div><p>Radiolabelled autologous leukocytes have been used for the clinical diagnosis of inflammation and infection. To develop a stable and efficient radiopharmaceutical for labelling leukocytes, we prepared a novel radioiodinated cell-penetrating peptide, <sup>125</sup>I-TAT, using a bi-functional linker. <sup>125</sup>I-TAT was stable for two days under three different temperature conditions of −20 °C, 4 °C, and 40 °C, with its radiochemical purity remaining over 99%. Iodinated TAT was non-toxic to leukocytes with an IC<sub>50</sub> value of over 100 μM. The labelling efficiency of <sup>125</sup>I-TAT using 1ｘ10<sup>7</sup> cells ranged from 27% to 53% when the three leukocyte cell lines were pre-treated with DMSO. This is comparable to the labelling efficiency recommended by the guideline for conventional labelling agents using 2ｘ10<sup>8</sup> cells. Radioiodinated cell-penetrating peptide may be an improved radiopharmaceutical for white blood cell scans by further optimization.</p></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141867637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigating the properties of ortho-positronium in liquid scintillators under oxygen quenching 研究氧淬火条件下液体闪烁体中正电子的特性。
IF 1.6 3区 工程技术
Applied Radiation and Isotopes Pub Date : 2024-07-29 DOI: 10.1016/j.apradiso.2024.111459
{"title":"Investigating the properties of ortho-positronium in liquid scintillators under oxygen quenching","authors":"","doi":"10.1016/j.apradiso.2024.111459","DOIUrl":"10.1016/j.apradiso.2024.111459","url":null,"abstract":"<div><p>Investigating the mechanism of positron annihilation in liquid-scintillator based neutrino experiments could be helpful for positron reconstruction algorithms and positron-electron discrimination analysis. Based on this, we utilize a novel positron annihilation lifetime spectrometer to characterize a series of liquid scintillator samples without direct contact with the positron source by applying the anti-coincidence method, which facilitates the measurement of liquids with high accuracy and low background. We obtain an ortho-positronium (o-Ps) lifetime value of 3.02 ns for liquid scintillators composed of linear alkylbenzene and two solutes, and we also measure liquid scintillator samples by bubbling different gases to study the interaction of oxygen dissolved with positronium. The discussion of the annihilation behavior of o-Ps in liquid scintillators further clarify the factors affecting the lifetime and intensity of o-Ps, and the calculation of annihilation rate and free volume radius within the samples has potential applications in characterizing gas solubility and free volume in liquids with o-Ps as probe.</p></div>","PeriodicalId":8096,"journal":{"name":"Applied Radiation and Isotopes","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141888306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信