Physics of Particles and Nuclei Letters最新文献

Topological Criteria for Identifying Two-Neutron Events in a 3D Neutron Detector 三维中子探测器中识别双中子事件的拓扑准则

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Physics of Particles and Nuclei Letters Pub Date : 2026-07-31 DOI: 10.1134/S1547477126700202

S. V. Afanasiev, A. V. Stavinsky, P. N. Alexeev, D. K. Dryablov, N. M. Zhigareva, D. G. Sakulin

引用次数: 0

Erratum to: Structure of 9, 10Be and 10, 11B Nuclei in the Shell Model of Strongly Deformed Nuclei 强形变核壳模型中9,10be和10,11b核的结构勘误

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Physics of Particles and Nuclei Letters Pub Date : 2026-07-31 DOI: 10.1134/S1547477126040011

V. V. Samarin

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The Formalism of Open Quantum Systems for Superfluid Helium Response to Neutrino Scattering 超流氦对中微子散射响应的开放量子系统的形式化

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Physics of Particles and Nuclei Letters Pub Date : 2026-07-31 DOI: 10.1134/S1547477126700184

K. A. Kouzakov, F. M. Lazarev, K. L. Stankevich, A. I. Studenikin, M. M. Vyalkov, A. A. Yukhimchuk

{"title":"The Formalism of Open Quantum Systems for Superfluid Helium Response to Neutrino Scattering","authors":"K. A. Kouzakov, F. M. Lazarev, K. L. Stankevich, A. I. Studenikin, M. M. Vyalkov, A. A. Yukhimchuk","doi":"10.1134/S1547477126700184","DOIUrl":"10.1134/S1547477126700184","url":null,"abstract":"Superfluid He-4 can serve as a tool for neutrino and dark matter detection. Low-energy neutrino interactions with superfluid He-4 can take place in the form of coherent elastic neutrino-atom scattering (CEvAS), a process that has not been observed so far. The first experimental study of CEvAS is in preparation in the National Center for Physics and Mathematics in Sarov. Using a high-intensity tritium neutrino source and a superfluid He-4 detector, it will have a rich potential to test the neutrino physics of the Standard Model and beyond it at unprecedentedly low energies. For example, one of the observable effects of the physics beyond the Standard Model in CEvAS can be neutrino millicharge and magnetic moment. In this study, we apply the formalism of open quantum systems to describe the evolution of the recoil helium atom after neutrino scattering on superfluid helium. In particular, we have obtained the Lindblad equation for a helium atom with an initial recoil energy of higher than 2 meV, which suffices to remove the atom from the condensate.","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 4","pages":"436 - 440"},"PeriodicalIF":0.5,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628590","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}

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Photoionization and Photoabsorption Study of Sr II Ions in the Framework of the Modified Atomic Orbital Theory 修正原子轨道理论框架下Sr - II离子的光电离和光吸收研究

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Physics of Particles and Nuclei Letters Pub Date : 2026-07-31 DOI: 10.1134/S1547477126700172

M. T. Gning, B. Diop, I. Sakho

{"title":"Photoionization and Photoabsorption Study of Sr II Ions in the Framework of the Modified Atomic Orbital Theory","authors":"M. T. Gning, B. Diop, I. Sakho","doi":"10.1134/S1547477126700172","DOIUrl":"10.1134/S1547477126700172","url":null,"abstract":"This work presents comprehensive calculations of resonance energies and quantum defects associated with photoabsorption and photoionization of singly ionized strontium (Sr II) over a wide energy range, using the modified atomic orbital theory (MAOT). The study focuses on Rydberg series originating from inner-shell transitions of the type 4p65s 2S1/2 → 4p45s (1,3P)ns/nd, as well as from doubly excited transitions 4p65s 2S1/2 → 4p54d (1,3P,3D)ns/nd. For the first time, resonance energies are determined for a wide range of principal quantum numbers n, including highly excited states of astrophysical relevance. The MAOT results show excellent agreement with experimental measurements obtained using the double laser plasma (DLP) technique and with multiconfiguration Hartree–Fock (MCHF) calculations reported by Banahan et al. [14]. These findings validate previously uncertain experimental assignments and clarify spectral features affected by strong overlap between the 4d and 5s orbitals and by pronounced configuration interaction. The present results significantly improve the reliability of available spectroscopic data and provide valuable atomic parameters for modeling astrophysical and laboratory plasmas.","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 4","pages":"419 - 435"},"PeriodicalIF":0.5,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628631","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

Modeling of Droplet Evaporation Kinetics in Air-Plasma Treatment of Spent Nuclear Fuel Reprocessing Wastes 乏燃料后处理废弃物空气-等离子体处理中液滴蒸发动力学建模

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Physics of Particles and Nuclei Letters Pub Date : 2026-07-31 DOI: 10.1134/S154747712670024X

Y. Ghoneim, A. G. Karengin, A. A. Karengin, I. Yu. Novoselov

{"title":"Modeling of Droplet Evaporation Kinetics in Air-Plasma Treatment of Spent Nuclear Fuel Reprocessing Wastes","authors":"Y. Ghoneim, A. G. Karengin, A. A. Karengin, I. Yu. Novoselov","doi":"10.1134/S154747712670024X","DOIUrl":"10.1134/S154747712670024X","url":null,"abstract":"A mathematical model is formulated to describe the plasma treatment of spent nuclear fuel (SNF) reprocessing wastes, which are fed into an air-plasma flow as dispersed aqueous–salt–organic compositions (ASOCs) containing ethanol or acetone as organic additives. The model describes the coupled kinetics of droplet heating and evaporation, interphase momentum exchange, and heat and mass transfer within a one-dimensional two-phase-flow framework, which is cast in dimensionless form to enable parametric analysis and scale-up. Thermochemical calculations are used to determine optimal ASOC formulations that provide an adiabatic combustion temperature of approximately 1500 K, thereby ensuring energetically efficient plasma operation and complete oxidation of the organic fraction. The influence of key operating parameters—initial plasma temperature and velocity, droplet size and injection velocity, and liquid-to-gas mass ratio—on the spatial extent of droplet evaporation is investigated numerically using a fourth-order Runge–Kutta integration scheme with controlled accuracy. The results show that, at temperatures above about 1500 K, the overall rate of plasma utilization is governed by solvent (water) evaporation, whereas further increases in inlet plasma temperature have only a weak effect on the length of the complete-evaporation zone. In contrast, droplet size and flow hydrodynamics exert a dominant influence: reducing the initial droplet diameter from 100 to 40 μm and decreasing the gas-flow velocity from 90 to 10 m s–1 lead to multi-fold reductions of the evaporation length, allowing complete evaporation within reactor lengths not exceeding 1 m. The resulting model serves as a physically sound and computationally efficient means of forecasting and refining droplet-evaporation dynamics in air-plasma reactors designed for processing wastes from spent nuclear fuel reprocessing and other liquid radioactive waste streams.","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 4","pages":"481 - 492"},"PeriodicalIF":0.5,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628521","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

Synthesis of Gd2O3 Nanoparticles and Gd2O3@SiO2 Core–Shell Particles with Variable Morphology 可变形貌Gd2O3纳米颗粒和Gd2O3@SiO2核壳粒子的合成

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Physics of Particles and Nuclei Letters Pub Date : 2026-07-31 DOI: 10.1134/S1547477126700251

E. Suslova, A. Kupriyanov, S. Maximov, D. Stolbov, O. Zaborova, D. Shashurin, G. Chelkov

{"title":"Synthesis of Gd2O3 Nanoparticles and Gd2O3@SiO2 Core–Shell Particles with Variable Morphology","authors":"E. Suslova, A. Kupriyanov, S. Maximov, D. Stolbov, O. Zaborova, D. Shashurin, G. Chelkov","doi":"10.1134/S1547477126700251","DOIUrl":"10.1134/S1547477126700251","url":null,"abstract":"Various methods to produce Gd-containing nanoparticles (precursors of Gd2O3) were assessed. Their size and morphology are shown to strongly depend on the synthesis technique and composition. The reaction of highly diluted solutions of gadolinium nitrate with ammonium oxalate led to formation of Gd2(C2O4)3 oxalate sol particles with a size of ~8 nm in presence of surfactant and ~26 nm particles when it was absent. During storage of these sols, the particle size increases to 180–200 nm. Gd(OH)3 particles and Gd2(C2O4)3 particles were synthesized by the sol–gel method. Hydroxide Gd(OH)3 had the morphology of extended broken planes, while oxalate Gd2(C2O4) had the structure of micrometer-sized polyhedra. Subsequent application of SiO2 shells to their surface by the hydrolytic decomposition of tetraethoxysilane led to formation of core–shell particles Gd(OH)3@SiO2 and Gd2(C2O4)3@SiO2, morphologically identical to the Gd(OH)3 and Gd2(C2O4)3 nuclei. Thermal decomposition of Gd(OH)3 and Gd2(C2O4)3 or gadolinium citrate resulted in formation of cubic Gd2O3 particles whose morphology does not depend on that of the precursors.","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 4","pages":"493 - 502"},"PeriodicalIF":0.5,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628591","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}

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Compton Suppressed Scintillation Spectrometer Based on a Cluster of 9×CeBr3–NaI(Tl) Phoswich Detectors 基于9×CeBr3-NaI （Tl）光子探测器簇的康普顿抑制闪烁光谱仪

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Physics of Particles and Nuclei Letters Pub Date : 2026-07-31 DOI: 10.1134/S1547477126700238

M. A. Povolotskiy, Yu. G. Sobolev, S. S. Stukalov

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Quantitative Assessment of Se(p,xn) Routes to Medical Bromine Radioisotopes 硒（p,xn）通往医用溴放射性同位素途径的定量评估

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Physics of Particles and Nuclei Letters Pub Date : 2026-07-31 DOI: 10.1134/S1547477126700196

Duaa Abed Salim, Rusul A. Najem, Bassam Thaban

{"title":"Quantitative Assessment of Se(p,xn) Routes to Medical Bromine Radioisotopes","authors":"Duaa Abed Salim, Rusul A. Najem, Bassam Thaban","doi":"10.1134/S1547477126700196","DOIUrl":"10.1134/S1547477126700196","url":null,"abstract":"This study investigates proton-induced reactions on enriched selenium targets, focusing on the production of bromine radioisotopes, which are of significant medical relevance for both diagnostic imaging and therapeutic applications. The study employs Monte Carlo samples to evaluate for experimental uncertainty in energy and cross-section simulations, then enters corrected energy into TALYS 2.0 and compares corrected cross-sections to predictions. The relative variance technique was used for assessing experimental data from the EXFOR database using nuclear level density models that are included of the TALYS 2.0 code. The results demonstrated that the 77Se(p,2n)76Br and 78Se(p,2n)77Br reactions are among the most significant production routes, yielding 224.4 and 284.1 mCi/(µA h), respectively, with radionuclidic purities of 96.8 and 85.5%. The CTM and TGHFB models exhibited the lowest relative variance in both reactions, despite the SHFB being the best model in several of the reactions under study. According to our findings, the statistical analysis procedure is a practical tool that processes cross-section and energy ranges of nuclear reaction accuracy to reduce uncertainty in calculations, hence facilitating new applications in nuclear research and medicine.","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 4","pages":"441 - 454"},"PeriodicalIF":0.5,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628644","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}

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Hadron Calorimeter for the MPD Experiment on the NICA Collider NICA对撞机MPD实验用强子量热计

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Physics of Particles and Nuclei Letters Pub Date : 2026-07-31 DOI: 10.1134/S1547477126700214

A. B. Kurepin, V. S. Popov, N. A. Kurepin

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Studying Photonuclear Reactions with Emission of α Particles on Natural Osmium and Iridium 天然锇和铱上α粒子发射光核反应的研究

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Physics of Particles and Nuclei Letters Pub Date : 2026-07-31 DOI: 10.1134/S1547477126700226

M. V. Zheltonozhskaya, A. A. Kim, P. D. Remizov, A. P. Chernyaev, V. V. Khankin, M. N. Yusupov

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