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Physics of Particles and Nuclei Letters最新文献

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Determination of Neutron Temperature at Irradiation Positions of IREN
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-05-14 DOI: 10.1134/S1547477124702327
L. T. M. Nhat, V. D. Cong, L. H. Khiem, S. B. Borzakov, A. Yu. Dmitriev, V. N. Shvetsov, V. V. Lobachev, O. S. Philippova, A. O. Zontikov, P. V. Sedyshev, N. A. Son, T. N. Toan, T. H. B. Phi, P. T. Thanh, D. V. Trung, N. T. Binh, N. T. X Thai
{"title":"Determination of Neutron Temperature at Irradiation Positions of IREN","authors":"L. T. M. Nhat,&nbsp;V. D. Cong,&nbsp;L. H. Khiem,&nbsp;S. B. Borzakov,&nbsp;A. Yu. Dmitriev,&nbsp;V. N. Shvetsov,&nbsp;V. V. Lobachev,&nbsp;O. S. Philippova,&nbsp;A. O. Zontikov,&nbsp;P. V. Sedyshev,&nbsp;N. A. Son,&nbsp;T. N. Toan,&nbsp;T. H. B. Phi,&nbsp;P. T. Thanh,&nbsp;D. V. Trung,&nbsp;N. T. Binh,&nbsp;N. T. X Thai","doi":"10.1134/S1547477124702327","DOIUrl":"10.1134/S1547477124702327","url":null,"abstract":"<p>The IREN facility, located in the Frank Laboratory of Neutron Physics at the Joint Institute for Nuclear Research, is an electron accelerator-driven source of intense pulsed neutrons with thermal and resonance energies. It is designed for the application of neutron time-of-flight spectroscopy, which is utilized for measuring neutron interaction cross sections and conducting elemental analysis through (epi)thermal and resonance neutron activation of samples. For the intended purposes, the precise determination of the neutron temperature at the irradiation positions is crucial. This report introduces a methodology for accurately determining the Maxwellian temperature (TM) of the thermal neutron distribution at the irradiation positions located on the outer wall of IREN’s neutron production target chamber.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 2","pages":"308 - 311"},"PeriodicalIF":0.4,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944200","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
Double-Hit Experimental Approach in Study of the Ternary Decays of 252Cf(sf)
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-05-14 DOI: 10.1134/S1547477124702339
Yu. V. Pyatkov, D. V. Kamanin, V. E. Zhuchko, Z. I. Goryainova, E. A. Kuznetsova, Yu. M. Sereda, A. N. Solodov, O. V. Strekalovsky, A. O. Zhukova, T. Vilane
{"title":"Double-Hit Experimental Approach in Study of the Ternary Decays of 252Cf(sf)","authors":"Yu. V. Pyatkov,&nbsp;D. V. Kamanin,&nbsp;V. E. Zhuchko,&nbsp;Z. I. Goryainova,&nbsp;E. A. Kuznetsova,&nbsp;Yu. M. Sereda,&nbsp;A. N. Solodov,&nbsp;O. V. Strekalovsky,&nbsp;A. O. Zhukova,&nbsp;T. Vilane","doi":"10.1134/S1547477124702339","DOIUrl":"10.1134/S1547477124702339","url":null,"abstract":"<p>The results of investigation of the break-up of some fraction of the fission fragments from the binary fission of <sup>252</sup>Cf(sf), while they pass through the Ti foil are presented. Two experimental approaches add each other in the study namely missing mass and “double-hit” methods. In the frame of the latter one both products of the break-up are detected in the same PIN diode. The break-up occurs after a binary fission and is delayed by approximately 150 ps. This is a strong indication that the fragment undergoing the break-up is born in the shape isomer state.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 2","pages":"312 - 315"},"PeriodicalIF":0.4,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944201","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
Examining the Z = 126 Magic Neutron Number Combinations in the Super Heavy Valley Using Relativistic Mean Field Formalism
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-05-14 DOI: 10.1134/S154747712470256X
J. A. Pattnaik, K. Dash, R. N. Panda
{"title":"Examining the Z = 126 Magic Neutron Number Combinations in the Super Heavy Valley Using Relativistic Mean Field Formalism","authors":"J. A. Pattnaik,&nbsp;K. Dash,&nbsp;R. N. Panda","doi":"10.1134/S154747712470256X","DOIUrl":"10.1134/S154747712470256X","url":null,"abstract":"<p>We investigate some bulk properties of the super heavy element <i>Z</i> = 126 isotopic series within the range 306 <span>(leqslant )</span> <i>A</i> <span>(leqslant )</span> 366. The relativistic mean field theory with NL3* parameter set and the FRDM and WS models are used to interpret the bulk properties. The structural properties like binding energy, charge distribution radius, quadrupole deformation parameter, two neutron separation energy, and neutron skin thickness are determined for the above regions for all three considered models, which is very promising. We find a little bump at <i>N</i> = 226 with the NL3* parameter set in the BE/A curve, which indicates the extra stability among the isotopic series. The NL3* parameter has shown an advantage over WS results in the case of charge distribution radius, showing peaks at different neutron numbers noted as <i>N</i> = 188, 210, 212, and 226. We noticed various ground state shape similarities at neutron number <i>N</i> = 182 for both NL3* set and FRDM model and WS at <i>N</i> = 198 and 226. This abnormal behavior suggests that shell effects may exist in this region.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 2","pages":"448 - 455"},"PeriodicalIF":0.4,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944202","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
Estimation of the Magnitude and Sign of the ROT Effect for 239, 241Pu, 241Am, and 245Cm Nuclei at Low Neutron Energy Inducing Their Fission
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-05-14 DOI: 10.1134/S1547477124702182
I. S. Guseva, Yu. I. Gusev
{"title":"Estimation of the Magnitude and Sign of the ROT Effect for 239, 241Pu, 241Am, and 245Cm Nuclei at Low Neutron Energy Inducing Their Fission","authors":"I. S. Guseva,&nbsp;Yu. I. Gusev","doi":"10.1134/S1547477124702182","DOIUrl":"10.1134/S1547477124702182","url":null,"abstract":"<p>The article presents all isotopes studied to date, the analysis of neutron induced fission of which has shown the presence of resonances corresponding to neutron energies close to 0.3 eV and promising for measuring the ROT effect on them. The dominance of one of the two possible components of the partial cross sections at these resonance energies should lead to the fact that the rotation of the compound nucleus before its rupture in one of the two directions will significantly predominate. As a result, the effect size is expected to be significant and with a quite predictable sign. The influence of resonances, the existence of which is assumed in the negative region of neutron energies, will be negligible here compared to the cold and thermal regions previously used to measure the ROT effect.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 2","pages":"246 - 250"},"PeriodicalIF":0.4,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944252","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
Modifying Effect of 1-β-D-arabinofuranosylcytosine on the Growth of the Solid Tumor Ehrlich Carcinoma in Mice under In Vivo and Ex Vivo Proton Irradiation of Cells
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-05-14 DOI: 10.1134/S1547477124702601
T. A. Belyakova, O. M. Rozanova, E. N. Smirnova, N. S. Strelnikova, E. A. Krasavin, A. V. Boreyko
{"title":"Modifying Effect of 1-β-D-arabinofuranosylcytosine on the Growth of the Solid Tumor Ehrlich Carcinoma in Mice under In Vivo and Ex Vivo Proton Irradiation of Cells","authors":"T. A. Belyakova,&nbsp;O. M. Rozanova,&nbsp;E. N. Smirnova,&nbsp;N. S. Strelnikova,&nbsp;E. A. Krasavin,&nbsp;A. V. Boreyko","doi":"10.1134/S1547477124702601","DOIUrl":"10.1134/S1547477124702601","url":null,"abstract":"<p>In this work, we study the modifying effect of the 1-β-D-arabinofuranosylcytosine (AraC) on tumor induction and growth in mice under the proton irradiation of Ehrlich ascites carcinoma (EAC) cells in vivo and ex vivo. A decrease in tumor growth rate after proton irradiation in the presence of AraC, both in vivo and ex vivo, has been shown. The most expressed antitumor effects of AraC in combination with proton irradiation have been revealed during the ex vivo irradiation of ascites cells<i>.</i> This may indicate a difference in the effect of AraC on cells irradiated in vivo and ex vivo, both at the stage of primary oncogenesis and during the development of an established neoplasm. The impact of incubation conditions, irradiation, and AraC concentration on the magnitude of radiosensitizing effect of AraC is discussed.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 2","pages":"477 - 486"},"PeriodicalIF":0.4,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944284","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
Nuclear Structure Investigations in 30P
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-05-14 DOI: 10.1134/S1547477124702261
D. Tonev, G. de Angelis, I. Deloncle, N. Goutev, A. Demerdjiev, I. Pantaleev, G. D. Dimitrova, S. G. Genchev, E. Geleva, N. N. Petrov
{"title":"Nuclear Structure Investigations in 30P","authors":"D. Tonev,&nbsp;G. de Angelis,&nbsp;I. Deloncle,&nbsp;N. Goutev,&nbsp;A. Demerdjiev,&nbsp;I. Pantaleev,&nbsp;G. D. Dimitrova,&nbsp;S. G. Genchev,&nbsp;E. Geleva,&nbsp;N. N. Petrov","doi":"10.1134/S1547477124702261","DOIUrl":"10.1134/S1547477124702261","url":null,"abstract":"<p>New results for the branching ratios of the positive parity band in the N=Z nucleus <sup>30</sup>P are presented. The data are extracted from the experiment at the laboratory Nazionali di Legnaro, Italy, using the GASP spectrometer with the reaction <sup>20</sup>Ne(<sup>12</sup>C, <i>pn</i>)<sup>30</sup>P. The excited states of <sup>30</sup>P are obtained from the strongest reaction channel. The good statistics of the data allows us to determine reliable branching ratios, which we report for the first time. Comparison with the theoretical predictions published earlier shows a remarkable agreement between the experiment and shell model calculations.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 2","pages":"280 - 283"},"PeriodicalIF":0.4,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944341","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
Using Carbon Stable Isotope to Evaluate Water Efficiency Following Seasonal Variation of Coffee Leaf in Lamdong Province, Vietnam
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-05-14 DOI: 10.1134/S1547477124702455
Vo Thi Mong Tham, Tran Quang Thien, Le Xuan Thang, Nguyen Minh Dao, Tran Tuan Anh, Phan Quang Trung, Nguyen Thi Huong Lan, Nguyen Huu Nghia, Phan Son Hai, Tuong Thi Thu Huong
{"title":"Using Carbon Stable Isotope to Evaluate Water Efficiency Following Seasonal Variation of Coffee Leaf in Lamdong Province, Vietnam","authors":"Vo Thi Mong Tham,&nbsp;Tran Quang Thien,&nbsp;Le Xuan Thang,&nbsp;Nguyen Minh Dao,&nbsp;Tran Tuan Anh,&nbsp;Phan Quang Trung,&nbsp;Nguyen Thi Huong Lan,&nbsp;Nguyen Huu Nghia,&nbsp;Phan Son Hai,&nbsp;Tuong Thi Thu Huong","doi":"10.1134/S1547477124702455","DOIUrl":"10.1134/S1547477124702455","url":null,"abstract":"<p>This study examines the water use efficiency (WUE) of coffee plants across different seasons by using carbon isotope (δ<sup>13</sup>C). In Lamdong province, Vietnam, we set up a 300 m<sup>2</sup> coffee farm to measure water use efficiency using carbon stable isotope ratios. We designed a sampling area, collected leaf samples during different irrigation seasons, measured local climate conditions and optimized the δ<sup>13</sup>C analysis procedure. Using ANOVA analyzing 54 leaf samples between two groups of seasons, we found that WUE of coffee plant was 14% higher in the rainy season (0.22) compared to the dry season (0.19), with a <i>p</i>-value of 0.017. The WUE of coffee plants is higher in the rainy season because the increased water availability reduces water stress, allowing the plants to maintain better hydration and more efficient carbon absorption.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 2","pages":"363 - 368"},"PeriodicalIF":0.4,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944342","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
Observation of Fission Isomers among Fragments of Spontaneous and Induced Fission of Heavy Nuclei
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-05-14 DOI: 10.1134/S1547477124702248
D. V. Kamanin, Yu. V. Pyatkov, A. N. Solodov, V. E. Zhuchko, Z. I. Goryainova, Yu. M. Sereda, O. V. Strekalovsky, E. A. Kuznetsova, A. O. Zhukova
{"title":"Observation of Fission Isomers among Fragments of Spontaneous and Induced Fission of Heavy Nuclei","authors":"D. V. Kamanin,&nbsp;Yu. V. Pyatkov,&nbsp;A. N. Solodov,&nbsp;V. E. Zhuchko,&nbsp;Z. I. Goryainova,&nbsp;Yu. M. Sereda,&nbsp;O. V. Strekalovsky,&nbsp;E. A. Kuznetsova,&nbsp;A. O. Zhukova","doi":"10.1134/S1547477124702248","DOIUrl":"10.1134/S1547477124702248","url":null,"abstract":"<p>In the work of the FOBOS group (Flerov Laboratory of Nuclear Reactions, JINR), the induced fission of fission fragments (FFs) in the shape isomer states was observed for the first time. As a part of a project dedicated to this phenomenon, both the mechanism of FF break-up and the characteristics of the reaction products are studied. The most promising experiments were performed at the MT-25 microtron at FLNR.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 2","pages":"272 - 275"},"PeriodicalIF":0.4,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944347","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
Issues of Verification and Attestation of Software Programs Used for Calculations of Research Reactors
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-05-14 DOI: 10.1134/S1547477124702406
T. S. Dikova, M. V. Bulavin, M. V. Rzyanin
{"title":"Issues of Verification and Attestation of Software Programs Used for Calculations of Research Reactors","authors":"T. S. Dikova,&nbsp;M. V. Bulavin,&nbsp;M. V. Rzyanin","doi":"10.1134/S1547477124702406","DOIUrl":"10.1134/S1547477124702406","url":null,"abstract":"<p>In the process of developing software programs involved in the process of safety justification of nuclear facilities, there are requirements both to the functionality of the software programs and to their verification. These requirements are based on the necessity to verify their correct operation through the verification process, in addition to ensuring that the functionality of the software meets the safety needs of nuclear facilities. The article considers the main requirements of the federal laws and regulatory legal acts of the Russian Federation associated with the attestation and verification of software programs used in research nuclear facilities. It analyses both the attestation process and approaches, as well as programs that require attestation. Recent trends and challenges in the field of validation and verification are discussed, and practical recommendations for validation activities in the research reactor context are offered.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 2","pages":"341 - 344"},"PeriodicalIF":0.4,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944191","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
Study of Displacements of Quadrupole Magnets of the NICA Collider during Cooling to Cryogenic Temperatures and Warming
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2025-05-14 DOI: 10.1134/S1547477124702522
Yu. A. Tsvetkova, Yu. G. Bespalov, A.V. Butenko, A. S. Zhbankov, S. A. Kostromin, D. N. Nikiforov, N. A. Filippova
{"title":"Study of Displacements of Quadrupole Magnets of the NICA Collider during Cooling to Cryogenic Temperatures and Warming","authors":"Yu. A. Tsvetkova,&nbsp;Yu. G. Bespalov,&nbsp;A.V. Butenko,&nbsp;A. S. Zhbankov,&nbsp;S. A. Kostromin,&nbsp;D. N. Nikiforov,&nbsp;N. A. Filippova","doi":"10.1134/S1547477124702522","DOIUrl":"10.1134/S1547477124702522","url":null,"abstract":"<p>Linear deformations of yokes and other structural elements occur in the range of 0.2–3.0 mm during the cooling of the structural elements—superconducting magnets of the NICA Collider. In order to form a closed orbit near its ideal configuration and ensure stable beam circulation, it is necessary to study the nature of the displacements of Nuclotron-type SC magnets during cooling down to operating temperatures and subsequent warming up to prove the absence of the systematic displacements of magnets. The experimental layout and design of the test bench to perform measurements of the displacements of Collider’s quadrupole magnets during cooling down from 290 to 4.5 K and subsequent warming up are discussed along with the results.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"22 2","pages":"413 - 422"},"PeriodicalIF":0.4,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944303","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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