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Design development of double-layer beam shaping assembly using extension nozzle to increase the quality of epithermal neutron beam as a boron neutron capture therapy neutron source 为提高超热中子束作为硼中子俘获治疗中子源的质量,采用延长喷嘴的双层束成形组件的设计开发
IF 0.3 Q4 PHYSICS, NUCLEAR Pub Date : 2021-12-25 DOI: 10.15407/jnpae2021.04.415
Bilalodin, A. Haryadi, Kartika Sari, Y. Sardjono, RasitoTursinah
Double layer beam shaping assembly (DLBSA) is a system that moderates fast neutrons into epithermal neutrons. The epithermal neutrons that leave the aperture in the DLBSA system are broadened in the space, thereby reducing the intensity and homogeneity of the epithermal neutron beams. Therefore, it is necessary to improve the design. The development of the DLBSA design was carried out using an extension nozzle. The nozzles are designed using materials made in three configurations, namely Ni+LiF load polyethylene, Pb+LiF load polyethylene, and Bi+LiF load polyethylene. The simulation results show that the addition of a nozzle at the tip of the DLBSA can channel the beam more directionally with high intensity. The addition of nozzles with Ni+LiF load PE material produces an epithermal neutron beam that meets the IAEA standards.
双层束整形组件(DLBSA)是一种将快中子缓和成超热中子的系统。离开DLBSA系统孔径的超热中子在空间上被加宽,从而降低了超热中子束的强度和均匀性。因此,有必要对设计进行改进。DLBSA设计的开发是使用延长喷嘴进行的。喷嘴采用Ni+LiF负载聚乙烯、Pb+LiF负载聚乙烯和Bi+LiF负载聚乙烯三种配置材料设计。仿真结果表明,在DLBSA的尖端增加喷嘴可以提高光束的定向和高强度通道。添加Ni+ liff负载PE材料的喷嘴可以产生符合IAEA标准的超热中子束。
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引用次数: 0
Principal provisions of the decommissioning concept for the WWR-M research reactor WWR-M研究堆退役概念的主要规定
IF 0.3 Q4 PHYSICS, NUCLEAR Pub Date : 2021-12-25 DOI: 10.15407/jnpae2021.04.348
Y. Lobach, E. Luferenko, M. Lysenko, V. M. Shevel
The decommissioning Concept for WWR-M research reactor is developed to meet the requirements of the current Ukrainian legislation. The main goal of the Concept is to provide a strategic stage of the work planning, including all the required justifications with a sufficient level of detail. It will allow during the next planning stage to develop the decommissioning project and other documents required to obtain the decommissioning license. The Concept is the institutional and technical document, which defines and substantiates the basic administrative, organizational, and technical measures for the preparation and implementation of the reactor decommissioning. It also describes the main activities and works, defines the procedure, conditions for their implementation and provision, and planned deadlines.
WWR-M研究堆的退役概念是为了满足乌克兰现行立法的要求而制定的。该概念的主要目标是提供工作规划的战略阶段,包括所有必要的理由,并提供足够的细节。它将允许在下一个规划阶段制定退役项目和获得退役许可证所需的其他文件。该概念是一份体制和技术文件,它确定并具体化了准备和实施反应堆退役的基本行政、组织和技术措施。它还描述了主要活动和工作,定义了程序、实施和提供的条件以及计划的截止日期。
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引用次数: 3
Impact of chronic irradiation of IMV 9096 and IMV 8614 strains of Pseudomonas aeruginosa on immunomodulatory properties of their lipopolysaccharide complex 慢性照射铜绿假单胞菌IMV 9096和IMV 8614菌株对其脂多糖复合物免疫调节特性的影响
IF 0.3 Q4 PHYSICS, NUCLEAR Pub Date : 2021-12-25 DOI: 10.15407/jnpae2021.04.375
J. V. Shylina, O. Molozhava, S. Litvinov, O. P. Dmitriev
The effect of chronic irradiation of Pseudomonas aeruginosa (P. aeruginosa) phytopathogenic strain IMV 9096 and saprophytic strain IMV 8614 at a dose rate of 0.19 µGy/s of γ-radiation in the dose field of 137Cs on the immunomodulatory properties of their lipopolysaccharide (LPS) has been investigated. It was shown that in the wild-type seedlings of Arabidopsis thaliana (A. thaliana) Col-0 pre-treatment with LPS 9096, isolated from both irradiated and non-irradiated bacterial culture, caused an increased harmful effect 2.8 - 5.6 fold when plants were then infected with bacteria of this strain. Seedling damage was more pronounced with the use of LPS, isolated from bacteria exposed to chronic radiation. In seedlings of mutant jin1 with impaired jasmonate signaling pre-treatment of LPS 9096 caused attenuation of the damage at 20 - 45 % when infected with P. aeruginosa 9096. Pre-treatment of Arabidopsis seeds with bacterial LPS 8614, obtained from both irradiated and non-irradiated P. aeruginosa 8614 cultures, had a non-significant effect (± 15 % over control). In mutant plants, jin1 pre-treatment of seeds with LPS 8614 led to increased damage when infected with P. aeruginosa IMV 9096 at 30 - 60 %. It was found that chronic irradiation of bacteria changes the immunomodulatory properties of their LPS and the effect depends on the bacterial strain. This effect is mediated by jasmonate and salicylate signaling systems.
研究了在137Cs剂量场下,以0.19 μ Gy/s的γ辐射速率慢性照射铜绿假单胞菌(P. aeruginosa)植物致病菌株IMV 9096和腐生菌株IMV 8614对其脂多糖(LPS)免疫调节特性的影响。结果表明,在拟南芥(A. thaliana) col0野生型幼苗中,经辐照和未辐照细菌培养分离的LPS 9096预处理后,该菌株的有害效应增加了2.8 ~ 5.6倍。使用从暴露于慢性辐射的细菌中分离出来的LPS对幼苗的损害更为明显。在茉莉酸信号通路受损的突变株jin1的幼苗中,LPS 9096处理后,感染P. aeruginosa 9096后,损伤减弱了20 - 45%。从辐照和未辐照的P. aeruginosa 8614培养物中获得的细菌LPS 8614预处理拟南芥种子,效果不显著(比对照组±15%)。在突变株中,用LPS 8614预处理jin1种子,当铜绿假单胞菌IMV 9096感染30 ~ 60%时,损伤增加。研究发现,长期照射细菌会改变其脂多糖的免疫调节特性,其影响与菌株有关。这种作用是由茉莉酸盐和水杨酸盐信号系统介导的。
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引用次数: 0
Dynamics of 137Сs content in tissues and organs of scots pine (Pinus sylvestris L.) in moist fairly infertile pine type of Polissya of Ukraine after Chornobyl accident 切尔诺贝利事故后乌克兰Polissya湿润相当不育林型苏格兰松(Pinus sylvestris L.)组织器官中137Сs含量的动态变化
IF 0.3 Q4 PHYSICS, NUCLEAR Pub Date : 2021-12-25 DOI: 10.15407/jnpae2021.04.382
V. Krasnov, O. Оrlov, O.V. Zhukovskyi
Based on multiyear monitoring observations, dynamics of 137Сs intake into the main tissues and organs of aboveground phytomass of Scots pine (Pinus sylvestris L.) during 30 years from the Chornobyl accident was determined as well peculiarities of their radioactive contamination. Empirical (observations), radioecological and statistical methods were used. It was found that for the wood increase of values of transfer factor was observed between 1991 and 2002 yrs with the further monotonous decrease of this value up to 2020; in internal bark, 1-year shoots, 2-year shoots, 1-year needles, 2-year needles, twigs thick and twigs thin multiyear dynamics was similar – an increase of values of transfer factor in the period of 1991 - 2002 yrs with further decrease of it up to 2020. At external bark, monotonous decrease of values of transfer factor was found during the whole observation period 1991 - 2020.
基于多年的监测观察,确定了切尔诺贝利事故后30年间苏格兰松(Pinus sylvestris L.)地上生物量主要组织和器官对137Сs的吸收动态及其放射性污染的特性。采用了经验(观察)、放射生态学和统计学方法。结果表明:1991 ~ 2002年木材的传递因子值呈上升趋势,到2020年呈单调下降趋势;内部树皮、1年嫩枝、2年嫩枝、1年针叶、2年针叶、细枝粗枝和细枝粗枝的多年动态相似,转移因子在1991 ~ 2002年呈增加趋势,到2020年呈下降趋势。在1991 ~ 2020年的整个观测期内,地表传递因子的值呈单调下降趋势。
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引用次数: 0
Further results from DAMA/LIBRA-phase2 and perspectives DAMA/LIBRA-phase2和透视图的进一步结果
IF 0.3 Q4 PHYSICS, NUCLEAR Pub Date : 2021-12-25 DOI: 10.15407/jnpae2021.04.329
R. Bernabei, P. Belli, A. Bussolotti, V. Caracciolo, F. Cappella, R. Cerulli, C. Dai, A. d’Angelo, N. Ferrari, A. Incicchitti, A. Leoncini, X. Ma, A. Mattei, V. Merlo, F. Montecchia, X. Sheng, Z. Ye
The data collected by the DAMA/LIBRA-phase2 set-up during two additional annual cycles have been analyzed, further investigating the long-standing model-independent annual modulation effect pointed out by DAMA deep underground at the Gran Sasso National Laboratory of the I.N.F.N. by using various different experimental configurations. Including the new results, the total exposure of DAMA/LIBRA-phase2 over 8 annual cycles is 1.53 t·yr and the evidence for a signal that meets all the requirements of the model-independent Dark Matter annual modulation signature is 11.8 σ C.L. in the energy region (1 - 6) keV. In the (2 - 6) keV energy interval, where data are also available from DAMA/NaI and DAMA/LIBRA-phase1, the achieved C.L. for the full exposure of 2.86 t·yr is 13.7 σ. No systematics or side reaction able to mimic this signature (i.e., to account for the whole measured modulation amplitude and to simultaneously satisfy all the requirements of the signature) has been found or suggested by anyone throughout some decades thus far. A preliminary result on the further lowering of the software energy threshold and perspectives are also mentioned.
对DAMA/LIBRA-phase2装置在另外两个年度周期中收集的数据进行了分析,通过使用各种不同的实验配置,进一步研究了DAMA在美国格兰萨索国家实验室地下深处指出的长期存在的与模型独立的年度调制效应。包括新结果在内,DAMA/LIBRA-phase2在8个年周期内的总曝光量为1.53 t·yr,在能量区域(1 - 6)keV内,满足模型无关暗物质年调制特征所有要求的信号证据为11.8 σ c.l。在(2 ~ 6)keV能量区间内,DAMA/NaI和DAMA/LIBRA-phase1均可获得数据,获得的全暴露2.86 t·yr的C.L.为13.7 σ。到目前为止,几十年来没有人发现或提出过能够模拟这一特征(即,考虑到整个测量的调制幅度并同时满足特征的所有要求)的系统或副反应。并对进一步降低软件能量阈值和前景进行了初步探讨。
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引用次数: 14
Nuclear security risks in Ukraine 乌克兰的核安全风险
IF 0.3 Q4 PHYSICS, NUCLEAR Pub Date : 2021-12-25 DOI: 10.15407/jnpae2021.04.409
V. I. Gavrilyuk, S. Drapey, B.V. Kaydyk, V. Kirischuk, V. Parkhomenko, O. Romanova, A. Samsonenko, E. I. Katunin, A.V. Boyko
An approach to conducting a qualitative risk assessment in the field of nuclear security was developed. Nuclear security events that might, with a certain probability, take place in Ukraine were identified. Using the method of expert assessment, qualitative assessments of the probabilities of the implementation of identified events and the levels of their consequences were obtained, a matrix of consequences/probabilities, in which Fibonacci numbers were applied when setting the limit values оf risks, was built and a qualitative assessment of risks was carried out. It has been established that in the field of Ukraine's nuclear security, the risk of sabotage at nuclear power plants is the greatest.
制定了在核安全领域进行定性风险评估的方法。确定了可能在乌克兰以一定概率发生的核安全事件。采用专家评估的方法,获得了确定事件的实施概率及其后果水平的定性评估,建立了一个后果/概率矩阵,其中斐波那契数在设定风险极限值时应用,并进行了风险的定性评估。已经确定,在乌克兰的核安全领域,核电站遭到破坏的风险是最大的。
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引用次数: 1
Determination of the nuclear radius parameter using the γ-ray spectrometer 用γ射线谱仪测定核半径参数
IF 0.3 Q4 PHYSICS, NUCLEAR Pub Date : 2021-12-25 DOI: 10.15407/jnpae2021.04.343
P. Patil, G. B. Hiremath, A. Vinayak, M. Hosamani, V.P. Singh, N. M. Badiger
The nuclear radius parameter of carbon, aluminium, iron, copper, and zinc nuclei has been determined by using (n,γ)-reaction. The neutrons from the americium-beryllium source are made to interact with the water moderator to produce the γ-rays of 2.2 MeV through (n,γ)-reaction. The γ-radiation emitted from the water medium is measured with a scintillation detector coupled to 8k multi-channel analyzer. The neutrons from the americium-beryllium source are allowed to transmit through carbon, aluminium, iron, copper, and zinc elemental targets of various thicknesses, and transmitted neutrons are again allowed to interact with water moderators to produce 2.2 MeV γ-radiation. By measuring the yield of γ-radiation produced in water moderators by neutrons transmitted through elemental targets of different mass number values, the total neutron interaction cross-sections are determined. By knowing the total neutron interaction cross-sections and mass number of the target nuclei, the radius parameter has been determined.
用(n,γ)反应测定了碳、铝、铁、铜和锌的核半径参数。来自镅-铍源的中子通过(n,γ)反应与水慢化剂相互作用产生2.2 MeV的γ射线。用闪烁探测器和8k多通道分析仪对水介质的γ辐射进行了测量。来自镅-铍源的中子被允许穿过不同厚度的碳、铝、铁、铜和锌元素靶,并且被传输的中子再次被允许与水减速剂相互作用,产生2.2 MeV的γ辐射。通过测量中子通过不同质量数的元素靶所产生的γ辐射的产率,确定了中子相互作用的总截面。通过已知靶核的总中子相互作用截面和质量数,确定了半径参数。
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引用次数: 0
Еffect of fullerene C60 on the diffusion of organic solvents' molecules Еffect富勒烯C60对有机溶剂分子扩散的影响
IF 0.3 Q4 PHYSICS, NUCLEAR Pub Date : 2021-09-25 DOI: 10.15407/jnpae2021.03.259
V. I. Slisenko, O. Vasylkevych
The results of studying the dynamics of molecules of solutions of fullerene C60 in benzene and toluene are presented. The studies were carried out by the method of quasi-elastic scattering of slow neutrons. The following were determined: the total self-diffusion coefficient D, its collective Dcoll and single-particle Ds-p contributions, and molecule relaxation time τ0 before and after the dissolution of fullerene. It is necessary to pay attention to the fact that in our case a kind of neutron contrast experiment takes place. The significant difference (more than ten times) in the cross-sections for an incoherent scattering of neutrons by hydrogen and carbon nuclei made it possible to obtain diffusion parameters that characterize the dynamics of solvent molecules exclusively. It turned out that the intensity of diffusion movements of solvent molecules is almost ten times higher than the mobility of fullerene molecules.
介绍了富勒烯C60在苯和甲苯溶液中分子动力学的研究结果。研究是用慢中子的准弹性散射方法进行的。测定了富勒烯溶解前后的总自扩散系数D、集体Dcoll和单粒子Ds-p贡献以及分子弛豫时间τ0。有必要注意的是,在我们的例子中进行了一种中子对比实验。中子在氢和碳核的非相干散射截面上的显著差异(超过10倍)使我们有可能获得表征溶剂分子动力学特性的扩散参数。结果表明,溶剂分子的扩散运动强度几乎是富勒烯分子迁移率的十倍。
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引用次数: 0
Inductive hyperthermia planning for patients with breast cancer metastasis to lymph nodes 乳腺癌淋巴结转移患者的诱导热疗计划
IF 0.3 Q4 PHYSICS, NUCLEAR Pub Date : 2021-09-25 DOI: 10.15407/jnpae2021.03.312
O. Mokhonko, V. Orel, I. Smolanka Sr, L. Syvak, A. Loboda, I. Dosenko, A. Lyashenko, I.I. Smolanka (Jr.), O. Rykhalskyi, V. B. Orel, O. Dasyukevich, T. Tarasenko, S. I. Vovyanko
Inductive hyperthermia treatment plans were built using Comsol Multiphysics software for patients with breast cancer metastasis to lymph nodes. To assess the influence of electromagnetic irradiation on temperature increase in metastatic lymph nodes, treatment plans were based on moderate hyperthermia parameters (< 42 °C). The proposed technology can be used to provide a more personalized approach to treatment planning for patients with locally advanced breast cancer receiving combination therapy which involves neoadjuvant chemotherapy and expand eligibility for organ-preserving surgery.
采用Comsol Multiphysics软件对乳腺癌淋巴结转移患者建立诱导热疗治疗方案。为了评估电磁辐射对转移性淋巴结温度升高的影响,治疗方案基于中高温参数(< 42°C)。该技术可用于为局部晚期乳腺癌患者提供更个性化的治疗方案,包括新辅助化疗和扩大器官保留手术的资格。
{"title":"Inductive hyperthermia planning for patients with breast cancer metastasis to lymph nodes","authors":"O. Mokhonko, V. Orel, I. Smolanka Sr, L. Syvak, A. Loboda, I. Dosenko, A. Lyashenko, I.I. Smolanka (Jr.), O. Rykhalskyi, V. B. Orel, O. Dasyukevich, T. Tarasenko, S. I. Vovyanko","doi":"10.15407/jnpae2021.03.312","DOIUrl":"https://doi.org/10.15407/jnpae2021.03.312","url":null,"abstract":"Inductive hyperthermia treatment plans were built using Comsol Multiphysics software for patients with breast cancer metastasis to lymph nodes. To assess the influence of electromagnetic irradiation on temperature increase in metastatic lymph nodes, treatment plans were based on moderate hyperthermia parameters (< 42 °C). The proposed technology can be used to provide a more personalized approach to treatment planning for patients with locally advanced breast cancer receiving combination therapy which involves neoadjuvant chemotherapy and expand eligibility for organ-preserving surgery.","PeriodicalId":42588,"journal":{"name":"Nuclear Physics and Atomic Energy","volume":"17 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75134350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of cross-section data for radionuclides used in positron emission tomography by effects of level density models using EMPIRE 3.2.2 code 利用EMPIRE 3.2.2代码用水平密度模型评价正电子发射断层扫描中放射性核素的截面数据
IF 0.3 Q4 PHYSICS, NUCLEAR Pub Date : 2021-09-25 DOI: 10.15407/jnpae2021.03.237
G. Hasan, E. Nury, F. Groppi
This work presents the evaluated results of cross-sections for natural chromium (natCr) with several nuclear reactions of natCr(d,x)52g,m+Mn, natCr(d,x)54Mn, natCr(d,x)51Cr, and natCr(d,x)48V using the statistical nuclear model EMPIRE 3.2.2 code with different level density models, for some radionuclides used in positron emission tomography. We compared the results to data sets found in literature, and data chosen from various sets of the electronic TENDL library.
本文采用统计核模型EMPIRE 3.2.2代码对正电子发射断层扫描中使用的一些放射性核素进行了几种核反应,分别为natCr(d,x)52g、m+Mn、natCr(d,x)54Mn、natCr(d,x)51Cr和natCr(d,x)48V,对天然铬(natCr)进行了截面评估。我们将结果与文献中发现的数据集以及从电子TENDL库中选择的数据集进行了比较。
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引用次数: 0
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Nuclear Physics and Atomic Energy
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