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Physics of Particles and Nuclei Letters最新文献

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Characteristics Analysis of the Electron Linear Accelerator with Dual Energy Switching and Magnetron-Based Power Supply 采用双能量开关和磁控管式电源的电子直线加速器的特性分析
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-11-22 DOI: 10.1134/S1547477124701760
M. A. Gusarova, V. I. Kaminskii, M. V. Lalayan, S. V. Matsievskiy
{"title":"Characteristics Analysis of the Electron Linear Accelerator with Dual Energy Switching and Magnetron-Based Power Supply","authors":"M. A. Gusarova,&nbsp;V. I. Kaminskii,&nbsp;M. V. Lalayan,&nbsp;S. V. Matsievskiy","doi":"10.1134/S1547477124701760","DOIUrl":"10.1134/S1547477124701760","url":null,"abstract":"<p>The creation of accelerators for the inspection of large objects during their transportation across state borders is an important task. To obtain high-quality images of the inspected object internal composition, the accelerator must be able to do a dual switch of beam energy from pulse to pulse [1]. A number of works are devoted to solving this problem, describing methods and real facilities with dual energy switch [2–5]. The energy switch is achieved by a stepwise change in the input power of the accelerating section and/or the magnitude of the accelerated current. In order to provide the necessary energy and beam current in high and low energy modes, the accelerating section parameters must be carefully tuned. This article compares two power supply schemes of a two-section linac with energy switch due to disconnection of one of the sections using circulators and bridges.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 6","pages":"1186 - 1189"},"PeriodicalIF":0.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679546","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
Distribution of Spin Fragments of the Binary Fission of Atomic Nuclei Taking into Account Wriggling and Bending Oscillations 考虑蠕动和弯曲振荡的原子核双裂变自旋碎片的分布
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-11-22 DOI: 10.1134/S1547477124701656
S. G. Kadmensky, D. E. Lyubashevsky, A. A. Pisklyukov, P. V. Kostryukov
{"title":"Distribution of Spin Fragments of the Binary Fission of Atomic Nuclei Taking into Account Wriggling and Bending Oscillations","authors":"S. G. Kadmensky,&nbsp;D. E. Lyubashevsky,&nbsp;A. A. Pisklyukov,&nbsp;P. V. Kostryukov","doi":"10.1134/S1547477124701656","DOIUrl":"10.1134/S1547477124701656","url":null,"abstract":"<p>A mechanism is proposed in quantum fission theory that describes the appearance of large values of the spins of light (<span>({{vec {J}}_{1}})</span>) and heavy (<span>({{vec {J}}_{2}})</span>) fission fragments (FFs) and large relative orbital momentum <span>(vec {L})</span>. An important difference between the approach proposed in this study and the widely used statistical model, which assumes heating of the FFs to temperatures of the order of 1 MeV, is the “coldness” of the fissile nucleus at all stages of its evolution, starting from the descent of the nucleus from the outer saddle point and ending with the moment of its fission into the indicated fragments. The approach proposed, which makes it possible to describe the spin distributions (SD) of binary fission fragments, both in the case of induced fission of the <span>({}^{{232}}{text{Th}}left( {n,f} right))</span> and <span>({}^{{238}}{text{U}}left( {n,f} right))</span> nuclei and spontaneous fission of the <span>({}^{{252}}{text{Cf}}left( {s,f} right))</span> nucleus is based on the joint consideration of zero-point wriggling and bending oscillations.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 6","pages":"1114 - 1117"},"PeriodicalIF":0.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679789","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
The Solution of the Smerlak’s Modification of the Eigen Model 斯梅拉克修正特征模型的解法
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-11-22 DOI: 10.1134/S154747712470167X
V. Suvorov
{"title":"The Solution of the Smerlak’s Modification of the Eigen Model","authors":"V. Suvorov","doi":"10.1134/S154747712470167X","DOIUrl":"10.1134/S154747712470167X","url":null,"abstract":"<p>The Eigen (quasispecies) model describes virus evolution via a system of nonlinear differential equations (nonlinear master equation). The model describes virus evolution, the origin of life, and some other phenomena of interdisciplinary research. Recently, M. Smerlak suggested a method by which these nonlinear models can be connected to Markov (linear) models. Here, we formulate Smerlak’s version of the Eigen model and solve the dynamics exactly at the large genome limit.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 6","pages":"1118 - 1123"},"PeriodicalIF":0.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679790","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
Nonlocality and the Real Surface Terms in the Velocity-Dependent Optical Potential for Elastic Scattering of Neutrons from Carbon Isotopes 碳同位素中子弹性散射速度相关光学势中的非位置性和实表面项
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-11-22 DOI: 10.1134/S1547477124701772
M. F. Hasan
{"title":"Nonlocality and the Real Surface Terms in the Velocity-Dependent Optical Potential for Elastic Scattering of Neutrons from Carbon Isotopes","authors":"M. F. Hasan","doi":"10.1134/S1547477124701772","DOIUrl":"10.1134/S1547477124701772","url":null,"abstract":"<p>The velocity-dependent optical potential used in this work leads to a local energy-dependent potential that consists of real surface terms that are proportional to the derivatives of the nuclear matter density. Such term—in other works—has been accounted for nonlocality due to the surface deformation in the light nuclei. In the present work, we have examined the ability of the velocity-dependent potential, which contains real surface-peaked terms, to account for nonlocality. This is achieved by inspecting the case of fitting the angular distribution data for the neutron that elastically scattered from a light nucleus, carbon isotopes (<sup>10</sup>C, <sup>12</sup>C, and <sup>14</sup>C) in the energy range of 12–20 MeV, by using two potential models: the modified velocity optical potential (which conations real surface-term) and the conventional optical potential. A comparison between the two models has been made. Furthermore, the total elastic cross sections and the analyzing power are calculated using both models and compared to the experimental data. The volume integrals per nucleon of the real central potential and the imaginary surface potential in the modified velocity optical potential have also been determined and the results are in good agreement with the corresponding values calculated using other models. It is shown that a significant improvement in angular distributions was observed when the velocity-dependent potential was applied, specifically in the large angle scattering region and in certain energy ranges.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 6","pages":"1190 - 1207"},"PeriodicalIF":0.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679499","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
Research into the Photovoltaic and Photodiode Modes of Operation of Photodiodes to Be Used in the Compact Precision Laser Inclinometer 研究用于紧凑型精密激光倾角仪的光电二极管的光电和光电二极管工作模式
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-11-22 DOI: 10.1134/S1547477124701711
Yu. V. Klemeshov, M. V. Lyablin
{"title":"Research into the Photovoltaic and Photodiode Modes of Operation of Photodiodes to Be Used in the Compact Precision Laser Inclinometer","authors":"Yu. V. Klemeshov,&nbsp;M. V. Lyablin","doi":"10.1134/S1547477124701711","DOIUrl":"10.1134/S1547477124701711","url":null,"abstract":"<p>One way to increase the sensitivity of the precision laser inclinometer (PLI) is to change over from the photovoltaic mode to the reverse-biased photodiode mode. This allows a broader linear range and an improved signal-to-noise ratio. Additionally, this approach enables the use of lower resolution ADCs (14–16 bit instead of 24 bit), which significantly reduces the cost of the device. A study of the Hamamatsu S12915-1010R/66R, Thorlabs FDS-100, and Hamamatsu S3204-08 photodiodes is conducted to determine their linear range of operation in the photovoltaic and photodiode modes. The noise level of the CPLI readout channels is measured using closed photodiodes, and two modes of operation of the photodiodes in the CPLI on the signal channels are investigated. The research results indicate the possibility of using this mode of operation of photodiodes in the CPLI.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 6","pages":"1152 - 1163"},"PeriodicalIF":0.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679738","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
Slow Control for MPD TPC LV and HV Systems Based on CAEN Equipment 基于 CAEN 设备的 MPD TPC 低压和高压系统的慢速控制
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-11-22 DOI: 10.1134/S154747712470170X
Y. Ghoniem, A. Pilyar, T. Smolyanin
{"title":"Slow Control for MPD TPC LV and HV Systems Based on CAEN Equipment","authors":"Y. Ghoniem,&nbsp;A. Pilyar,&nbsp;T. Smolyanin","doi":"10.1134/S154747712470170X","DOIUrl":"10.1134/S154747712470170X","url":null,"abstract":"<p>The MPD detector is one of two at NICA collider. For MPD detector control system the TANGO software was proposed. Time projection chamber (TPC) is the tracker of the MPD. The TPC LV and HV systems are based on CAEN equipment and OPC UA server protocol. The status of interface design for CAEN equipment based on OPC UA, TANGO server and GRAFANA is presented. GRAFANA will be used to present graphs of the variation in the parameters of HV and LV during the monitoring.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 6","pages":"1145 - 1151"},"PeriodicalIF":0.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679739","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
Technique of Modification of the Bragg Peak of a Proton Beam for Radiotherapy 用于放射治疗的质子束布拉格峰修正技术
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-11-22 DOI: 10.1134/S1547477124701747
A. A. Abduvaliev, A. V. Agapov, V. M. Breev, G. V. Mytsin, J. H. Khushvaktov, S. S. Uglova, K. N. Shipulin
{"title":"Technique of Modification of the Bragg Peak of a Proton Beam for Radiotherapy","authors":"A. A. Abduvaliev,&nbsp;A. V. Agapov,&nbsp;V. M. Breev,&nbsp;G. V. Mytsin,&nbsp;J. H. Khushvaktov,&nbsp;S. S. Uglova,&nbsp;K. N. Shipulin","doi":"10.1134/S1547477124701747","DOIUrl":"10.1134/S1547477124701747","url":null,"abstract":"<p>JINR in collaboration with the St. Petersburg-based Efremov Institute of Electrophysical Apparatus (NIIEFA) is developing a superconducting isochronous cyclotron MSC230, which is intended to conduct research in radiobiology and to develop proton flash radiotherapy techniques. In relation to this, formation of a high-intensity proton beam with the energy selectable in a range of 120–230 MeV, a dose rate of 50–100 Gy/s, and homogeneous in cross section with a diameter of 13–15 cm at the new accelerator is explored. Results of modeling by the Monte Carlo method and measurements of the depth-dose distributions of a proton beam, the energy spectrum of which is modified to obtain an extended homogeneous plateau at the end of the range (spread-out Bragg peak), are presented. This is achieved by using so-called ridge filters. A method for design and manufacturing ridge filters using a 3D printer that can change the length of the plateau in a fairly wide range of values by rotating it relative to the beam axis is presented. The results of the study lend a hope that two sets, each consisting of 5–6 such filters, will be able to span the entire required range of the Bragg peak plateau, and for all values of the selected energy.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 6","pages":"1174 - 1180"},"PeriodicalIF":0.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679548","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
Effects of Fractionated Proton Irradiation in Combination with 1-β-D-Arabinofuranosylcytosine on B16 Murine Melanoma In Vivo 分段质子辐照联合 1-β-D-Arabinofuranosylcytosine 对体内 B16 小鼠黑色素瘤的影响
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-11-22 DOI: 10.1134/S1547477124701784
I. A. Zamulaeva, O. N. Matchuk, E. I. Selivanova, V. A. Mosina, M. R. Abramova, V. O. Saburov, S. N. Koryakin, S. A. Ivanov, A. D. Kaprin, A. V. Boreyko, V. N. Chausov, E. A. Krasavin
{"title":"Effects of Fractionated Proton Irradiation in Combination with 1-β-D-Arabinofuranosylcytosine on B16 Murine Melanoma In Vivo","authors":"I. A. Zamulaeva,&nbsp;O. N. Matchuk,&nbsp;E. I. Selivanova,&nbsp;V. A. Mosina,&nbsp;M. R. Abramova,&nbsp;V. O. Saburov,&nbsp;S. N. Koryakin,&nbsp;S. A. Ivanov,&nbsp;A. D. Kaprin,&nbsp;A. V. Boreyko,&nbsp;V. N. Chausov,&nbsp;E. A. Krasavin","doi":"10.1134/S1547477124701784","DOIUrl":"10.1134/S1547477124701784","url":null,"abstract":"<p>This study is a search for means of sensitization of malignant tumors to proton radiation among DNA damage repair inhibitors. It has been found that in the presence of 1-β-D-arabinofuranosylcytosine (AraC), five weekly proton irradiations at a total focal dose of 50 Gy lead to a more pronounced inhibition of B16 murine melanoma growth than the same irradiation without AraC (<i>p</i> &lt; 0.05 ). This effect, associated with a decrease in the proliferative activity of cells in the general population and a decrease in the number of cancer stem cells specifically in the AraC+Protons group, is promising for further improvement of proton radiotherapy.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 6","pages":"1208 - 1218"},"PeriodicalIF":0.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679549","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
Estimating Orbital Momenta of Binary-Fission Fragments 估算双裂变碎片的轨道动量
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-11-22 DOI: 10.1134/S1547477124701668
S. G. Kadmensky, L. V. Titova, D. E. Lyubashevsky, A. A. Pisklyukov
{"title":"Estimating Orbital Momenta of Binary-Fission Fragments","authors":"S. G. Kadmensky,&nbsp;L. V. Titova,&nbsp;D. E. Lyubashevsky,&nbsp;A. A. Pisklyukov","doi":"10.1134/S1547477124701668","DOIUrl":"10.1134/S1547477124701668","url":null,"abstract":"<p>The mechanism for the appearance of large values of the relative orbital momenta <i>L</i> of the fragments of spontaneous nuclear fission is shown to be associated with quantum transverse wriggling vibrations of the fissile nucleus at its rupture point. This mechanism assumes that the fissile nucleus remains cold up to its rupture into fission fragments. Based on the considered mechanism, an analytical formula was derived for the first time to estimate the average value of the orbital momentum and the angular distribution of fission fragments. The results obtained are an important contribution to the understanding of nuclear fission, and have important significance in problems of heat release in nuclear reactors arising from the propagation of instantaneous gamma rays emitted by fission fragments.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 6","pages":"1111 - 1113"},"PeriodicalIF":0.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679788","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
Thermal Properties of a Two-Dimensional Kemmer Oscillator for Spin-1 Particles 自旋-1 粒子二维凯莫振荡器的热特性
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2024-10-16 DOI: 10.1134/S1547477124701486
A. Boumali, F. Serdouk
{"title":"Thermal Properties of a Two-Dimensional Kemmer Oscillator for Spin-1 Particles","authors":"A. Boumali,&nbsp;F. Serdouk","doi":"10.1134/S1547477124701486","DOIUrl":"10.1134/S1547477124701486","url":null,"abstract":"<p>This study explores the features of a two-dimensional Kemmer oscillator within the context of relativistic quantum mechanics. By rigorously deriving eigenstates and conducting thermal analysis using the Euler–Maclaurin method, we aim to unveil the subtleties of its dynamics. Our inquiry endeavors to shed light on the thermal characteristics of the system, thus enriching our comprehension of relativistic quantum phenomena.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"21 5","pages":"957 - 963"},"PeriodicalIF":0.4,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438736","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
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