Nuclear Physics A最新文献

Exploring algebraic symmetries in krypton nuclei 探索氪核的代数对称性

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-07-08 DOI: 10.1016/j.nuclphysa.2025.123204

Narjes Amiri, Zahra Molayi, Aydin Ghalehasadi, Mohammad Ali Jafarizadeh

引用次数: 0

Improving energy resolution in an α-TOF detector 提高α-TOF探测器的能量分辨率

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-07-07 DOI: 10.1016/j.nuclphysa.2025.123202

Peter Schury , Toshitaka Niwase , Michiharu Wada , Kouji Morimoto , Daiya Kaji , Sota Kimura , Yuki Yamanouchi

{"title":"Improving energy resolution in an α-TOF detector","authors":"Peter Schury , Toshitaka Niwase , Michiharu Wada , Kouji Morimoto , Daiya Kaji , Sota Kimura , Yuki Yamanouchi","doi":"10.1016/j.nuclphysa.2025.123202","DOIUrl":"10.1016/j.nuclphysa.2025.123202","url":null,"abstract":"<div><div>The alpha-TOF detector is a commercial MagneTOF ion detector with a silicon PIN diode embedded in the impact plate. We have developed the device for use in multi-reflection time-of-flight (ToF) mass spectrometry of radioisotopes, in particular superheavy elements. The alpha-decay signals provide a succinct means to identify that an implanted ion was indeed from a radioisotope ion. Until now, however, inherent noise in the detector limited the energy resolution to around <span><math><msub><mrow><mi>σ</mi></mrow><mrow><mi>E</mi></mrow></msub><mo>≈</mo><mn>150</mn></math></span> keV full-width, which was insufficient for precise identification from <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>α</mi></mrow></msub></math></span>. By selectively shutting off the high-voltage bias applied to the detector's dynode, we have significantly reduced the noise in the detector and achieved a resolution of <span><math><msub><mrow><mi>σ</mi></mrow><mrow><mi>E</mi></mrow></msub></math></span> ≈20 keV full-width. This will allow precise identification of the nuclide and nuclear state of each decay-correlated ToF event.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123202"},"PeriodicalIF":1.7,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144571821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evolution of shell-driven fission below the actinides 锕系元素以下壳驱动裂变的演化

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-07-01 DOI: 10.1016/j.nuclphysa.2025.123174

J. Buete , B.M.A. Swinton-Bland , D.J. Hinde , K.J. Cook , M. Dasgupta , A.C. Berriman , D.Y. Jeung , K. Banerjee , L.T. Bezzina , I.P. Carter , C. Sengupta , C. Simenel , E.C. Simpson

{"title":"Evolution of shell-driven fission below the actinides","authors":"J. Buete , B.M.A. Swinton-Bland , D.J. Hinde , K.J. Cook , M. Dasgupta , A.C. Berriman , D.Y. Jeung , K. Banerjee , L.T. Bezzina , I.P. Carter , C. Sengupta , C. Simenel , E.C. Simpson","doi":"10.1016/j.nuclphysa.2025.123174","DOIUrl":"10.1016/j.nuclphysa.2025.123174","url":null,"abstract":"<div><div>The results of a systematic measurement of heavy-ion induced fission of every even-<em>Z</em> nucleus from <sup>144</sup>Gd to <sup>212</sup>Th (<span><math><msub><mrow><mi>Z</mi></mrow><mrow><mi>CN</mi></mrow></msub><mo>=</mo><mn>64</mn><mtext> – </mtext><mn>90</mn></math></span>) along a line of constant <span><math><mi>N</mi><mo>/</mo><mi>Z</mi></math></span> is presented. We identified shell-driven fission in all systems studied. The evolving structure of the fission mass distributions with increasing <span><math><msub><mrow><mi>Z</mi></mrow><mrow><mi>CN</mi></mrow></msub></math></span> and two-dimensional mass-kinetic fitting indicates that deformed proton shell effects in the nascent fission fragments of <span><math><msub><mrow><mi>Z</mi></mrow><mrow><mi>FF</mi></mrow></msub><mo>=</mo><mn>34</mn><mo>,</mo><mn>36</mn></math></span> and <span><math><msub><mrow><mi>Z</mi></mrow><mrow><mi>FF</mi></mrow></msub><mo>=</mo><mn>44</mn><mo>,</mo><mn>46</mn></math></span> as the primary drivers of mass-asymmetric fission in this region. For light systems (<span><math><msub><mrow><mi>Z</mi></mrow><mrow><mi>CN</mi></mrow></msub><mo><</mo><mn>80</mn></math></span>) <span><math><msub><mrow><mi>Z</mi></mrow><mrow><mi>FF</mi></mrow></msub><mo>=</mo><mn>34</mn><mo>,</mo><mn>36</mn></math></span> can be seen to drive fission as either the heavy or light fission fragment and also at mass-symmetry with changing <span><math><msub><mrow><mi>Z</mi></mrow><mrow><mi>CN</mi></mrow></msub></math></span>.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123174"},"PeriodicalIF":1.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure of the heaviest nuclei 最重核的结构

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-06-27 DOI: 10.1016/j.nuclphysa.2025.123201

A. Lopez-Martens , P. Brionnet , R. Chakma , K. Hauschild , K. Kessaci , O. Dorvaux , B. Gall , A.I. Svirikhin , A.V. Yeremin , the GABRIELA collaboration

引用次数: 0

Analysis of the near-side ridge structure in pp collisions via Momentum-Kick Model 基于动量踢模型的pp碰撞近侧脊结构分析

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-06-23 DOI: 10.1016/j.nuclphysa.2025.123200

Jaesung Kim, Jin-Hee Yoon

{"title":"Analysis of the near-side ridge structure in pp collisions via Momentum-Kick Model","authors":"Jaesung Kim, Jin-Hee Yoon","doi":"10.1016/j.nuclphysa.2025.123200","DOIUrl":"10.1016/j.nuclphysa.2025.123200","url":null,"abstract":"<div><div>The near-side ridge structure has been observed in the long-range two-particle correlations in heavy-ion collisions, such as AuAu collisions at the Relativistic Heavy Ion Collider (RHIC) and PbPb collisions at the Large Hadron Collider (LHC). Hydrodynamic models have successfully explained the ridge structure in heavy-ion collisions, indicating the presence of Quark-Gluon Plasma (QGP). Interestingly, similar ridge structures have been detected in high-multiplicity proton-proton and proton-lead collisions, which are classified as small systems in the LHC experiments. Because small systems have been considered insufficient to generate QGP, the applicability of theories developed for heavy-ion collisions to small systems remains controversial. Assuming that kinematic effects play a more significant role in small systems, we expect that the Momentum-Kick Model (MKM) can provide a satisfactory explanation. This model elucidates the long-range and near-side ridge structure in dihadron <span><math><mi>Δ</mi><mi>η</mi><mo>−</mo><mi>Δ</mi><mi>ϕ</mi></math></span> correlation by explaining that jet particles kick and rearrange medium partons along the direction of the jets. In this study, we apply the MKM to explain high-multiplicity proton-proton collisions at both 13 TeV and 7 TeV in the LHC over various ranges of momenta. Furthermore, we introduce multiplicity dependence in the model to account for the 13 TeV data at various multiplicity ranges. We conclude that the MKM effectively explains the near-side ridge structure observed in proton-proton collisions. The LHC has entered Run 3, achieving higher center-of-mass energies and better luminosity than Run 2. We offer Δ<em>ϕ</em> correlation predictions for pp collisions at 14 TeV and suggest possible extensions of the MKM for future studies.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123200"},"PeriodicalIF":1.7,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144490823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Test of bell locality violation in flavor entangled neutral meson pair 香味纠缠中性介子对贝尔局域违逆的检验

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-06-18 DOI: 10.1016/j.nuclphysa.2025.123199

Kaiwen Chen , Zhi-Peng Xing , Ruilin Zhu

引用次数: 0

Observation of suppression of heavy-ion fusion by slow quasifission 慢准裂变抑制重离子聚变的观察

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-06-16 DOI: 10.1016/j.nuclphysa.2025.123198

L.T. Bezzina, E.C. Simpson, D.J. Hinde, M. Dasgupta

{"title":"Observation of suppression of heavy-ion fusion by slow quasifission","authors":"L.T. Bezzina, E.C. Simpson, D.J. Hinde, M. Dasgupta","doi":"10.1016/j.nuclphysa.2025.123198","DOIUrl":"10.1016/j.nuclphysa.2025.123198","url":null,"abstract":"<div><div>The formation of superheavy elements (SHEs) by nuclear fusion can be conceptually divided into two steps: capture, and compound nucleus formation. Following capture, if the two nuclei reseparate before forming an equilibrated compound nucleus, fusion cannot proceed. This outcome is called quasifission.</div><div>In most cases, quasifission and fusion-fission distributions have considerable overlap. To obtain a direct experimental signature of fusion, evaporation residue (ER) measurements are therefore the most reliable signature of compound nucleus formation. ER cross section measurements forming the same compound nucleus, <sup>220</sup>Th, using <sup>16</sup>O, <sup>40</sup>Ar, <sup>48</sup>Ca, <sup>82</sup>Se and <sup>124</sup>Sn-induced reactions <span><span>[1]</span></span>, <span><span>[2]</span></span>, <span><span>[3]</span></span>, <span><span>[4]</span></span> revealed <span><span>[1]</span></span> that fusion was severely suppressed for the more symmetric reactions relative to the <sup>16</sup>O-induced reaction.</div><div>This work presents ER measurements of two new reactions forming <sup>220</sup>Th using <sup>28</sup>Si, <sup>34</sup>S projectiles. These measurements conclusively show an exponential suppression of the ER cross section as a function of <span><math><msub><mrow><mi>Z</mi></mrow><mrow><mi>p</mi></mrow></msub><msub><mrow><mi>Z</mi></mrow><mrow><mi>t</mi></mrow></msub></math></span>. The fission characteristics show no mass-angle correlation, demonstrating that here ER cross sections are suppressed by slow quasifission.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123198"},"PeriodicalIF":1.7,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Production of the neutron-rich nucleus 6H in an electron-scattering experiment at MAMI-A1 MAMI-A1电子散射实验中富中子核6H的产生

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-06-13 DOI: 10.1016/j.nuclphysa.2025.123196

Tianhao Shao , Patrick Achenbach , Jinhui Chen , Mirco Christmann , Michael O. Distler , Luca Doria , Anselm Esser , Julian Geratz , Christian Helmel , Matthias Hoek , Ryoko Kino , Pascal Klag , Yu-Gang Ma , David Markus , Harald Merkel , Miha Mihovilovič , Ulrich Müller , Sho Nagao , Kotaro Nishi , Fumiya Oura , Luca Wilhelm

引用次数: 0

Fusion dynamics far below the barrier for 12C + 28Si 12C + 28Si的聚变动力学远低于势垒

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-06-13 DOI: 10.1016/j.nuclphysa.2025.123195

D. Brugnara , G. Montagnoli , A.M. Stefanini , M. Del Fabbro , P.A. Aguilera Jorquera , G. Andreetta , F. Angelini , M. Balogh , J. Benito , G. Benzoni , A. Bonhomme , S. Bottoni , S. Carollo , G. Colucci , L. Corradi , S. Courtin , R. Depalo , A. Ertoprak , E. Fioretto , F. Galtarossa , I. Zanon

引用次数: 0

Role of dissipation on the quasielastic barrier distributions of the 20Ne+92,94,95Mo systems 耗散对20Ne+ 92,94,95mo体系准弹性势垒分布的影响

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-06-13 DOI: 10.1016/j.nuclphysa.2025.123197

G. Colucci , A. Trzcińska , E. Piasecki , M. Wolińska-Cichocka , A. Barbon , Z.K. Czerski , G. D'Agata , E. De Filippo , R. Dubey , E. Geraci , B. Gnoffo , K. Hadyńska-Klȩk , G. Jaworski , M. Kisieliński , P. Koczoń , M. Kondzielska , M. Kowalczyk , Y. Leifels , B. Lommel , M. Matuszewski , B. Zalewski

{"title":"Role of dissipation on the quasielastic barrier distributions of the 20Ne+92,94,95Mo systems","authors":"G. Colucci , A. Trzcińska , E. Piasecki , M. Wolińska-Cichocka , A. Barbon , Z.K. Czerski , G. D'Agata , E. De Filippo , R. Dubey , E. Geraci , B. Gnoffo , K. Hadyńska-Klȩk , G. Jaworski , M. Kisieliński , P. Koczoń , M. Kondzielska , M. Kowalczyk , Y. Leifels , B. Lommel , M. Matuszewski , B. Zalewski","doi":"10.1016/j.nuclphysa.2025.123197","DOIUrl":"10.1016/j.nuclphysa.2025.123197","url":null,"abstract":"<div><div>The quasielastic barrier distributions of the <sup>20</sup>Ne+  <sup>92,94,95</sup>Mo systems.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123197"},"PeriodicalIF":1.7,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0