首页 > 最新文献

Physical Review C最新文献

英文 中文
Importance of whispering gallery resonances for nuclear scattering from weakly bound or unstable nuclei 弱结合核或不稳定核的核散射中 "耳语走廊 "共振的重要性
IF 3.1 2区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2024-09-05 DOI: 10.1103/physrevc.110.034603
Alan C. Shotter, Alessia Di Pietro
Internal surface standing wave resonances can occur when either electromagnetic or acoustic waves interact with cylindrical or spherical material structures. These resonances are often termed whispering gallery resonances, a reference to the focusing of sound within a cylindrical gallery. Here, a report is presented of an investigation to establish the importance of such surface standing wave resonances for nuclear wave scattering from unstable or weakly bound nuclei. To facilitate the investigation an analytical model, the transitional rotational model, has been developed to probe the occurrence of whispering gallery phenomena within nuclear wave scattering. Understanding such phenomena can be relevant when nuclear structure information are derived from scattering experiments. Moreover, it can also be important for the understanding of nuclear pathways leading to stellar explosions.
当电磁波或声波与圆柱形或球形材料结构相互作用时,会产生内表面驻波共振。这些共振通常被称为耳语走廊共振,指的是声音在圆柱形走廊内的聚焦。本文报告了一项研究,旨在确定这种表面驻波共振对于不稳定或弱结合原子核的核波散射的重要性。为了便于研究,我们开发了一个分析模型,即过渡旋转模型,用于探测核波散射中出现的耳语走廊现象。当从散射实验中获得核结构信息时,了解这种现象是非常重要的。此外,它对于理解导致恒星爆炸的核途径也很重要。
{"title":"Importance of whispering gallery resonances for nuclear scattering from weakly bound or unstable nuclei","authors":"Alan C. Shotter, Alessia Di Pietro","doi":"10.1103/physrevc.110.034603","DOIUrl":"https://doi.org/10.1103/physrevc.110.034603","url":null,"abstract":"Internal surface standing wave resonances can occur when either electromagnetic or acoustic waves interact with cylindrical or spherical material structures. These resonances are often termed whispering gallery resonances, a reference to the focusing of sound within a cylindrical gallery. Here, a report is presented of an investigation to establish the importance of such surface standing wave resonances for nuclear wave scattering from unstable or weakly bound nuclei. To facilitate the investigation an analytical model, the transitional rotational model, has been developed to probe the occurrence of whispering gallery phenomena within nuclear wave scattering. Understanding such phenomena can be relevant when nuclear structure information are derived from scattering experiments. Moreover, it can also be important for the understanding of nuclear pathways leading to stellar explosions.","PeriodicalId":20122,"journal":{"name":"Physical Review C","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 deuteron from an analysis of bremsstrahlung emission in proton-deuteron scattering in cluster models 通过分析簇模型中质子-氘核散射的轫致辐射得出氘核的结构
IF 3.1 2区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2024-09-04 DOI: 10.1103/physrevc.110.034001
K. A. Shaulskyi, S. P. Maydanyuk, V. S. Vasilevsky
Background: Emission of bremsstrahlung photons in the scattering of protons off deuterons is investigated on the microscopic cluster basis in a wide region of beam energy from low energies up to 1.5 GeV.
背景:在从低能到 1.5 GeV 的广泛光束能量区域内,对质子与氘核的散射中轫致辐射光子的发射进行了微观集束研究。
{"title":"Structure of the deuteron from an analysis of bremsstrahlung emission in proton-deuteron scattering in cluster models","authors":"K. A. Shaulskyi, S. P. Maydanyuk, V. S. Vasilevsky","doi":"10.1103/physrevc.110.034001","DOIUrl":"https://doi.org/10.1103/physrevc.110.034001","url":null,"abstract":"<b>Background:</b> Emission of bremsstrahlung photons in the scattering of protons off deuterons is investigated on the microscopic cluster basis in a wide region of beam energy from low energies up to 1.5 GeV.","PeriodicalId":20122,"journal":{"name":"Physical Review C","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Weak entanglement approximation for nuclear structure 核结构的弱纠缠近似
IF 3.1 2区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2024-09-04 DOI: 10.1103/physrevc.110.034305
Oliver C. Gorton, Calvin W. Johnson
The interacting shell model, a configuration-interaction method, is a venerable approach for low-lying nuclear structure calculations, but it is hampered by the exponential growth of its basis dimension as one increases the single-particle space and/or the number of active particles. Recent, quantum-information-inspired work has demonstrated that the proton and neutron sectors of a nuclear wave function are weakly entangled. Furthermore, the entanglement is smaller for nuclides away from N=Z, such as heavy, neutron-rich nuclides. Here we implement a weak entanglement approximation to bipartite configuration-interaction wave functions, approximating low-lying levels by coupling a relatively small number of many-proton and many-neutron states. This truncation scheme, which we present in the context of past approaches, reduces the basis dimension by many orders of magnitude while preserving essential features of nuclear spectra.
相互作用壳模型是一种构型相互作用方法,是一种古老的低洼核结构计算方法,但随着单粒子空间和/或活性粒子数量的增加,其基础维度呈指数增长,这阻碍了它的发展。最近,受量子信息启发的工作证明,核波函数的质子和中子扇区是弱纠缠的。此外,对于远离 N=Z 的核素,如重型富中子核素,纠缠程度较小。在这里,我们对二方构型-相互作用波函数进行了弱纠缠近似,通过耦合相对较少的多质子和多中子态来近似低洼水平。我们结合过去的方法介绍了这种截断方案,它在保留核谱基本特征的同时,将基础维度降低了许多数量级。
{"title":"Weak entanglement approximation for nuclear structure","authors":"Oliver C. Gorton, Calvin W. Johnson","doi":"10.1103/physrevc.110.034305","DOIUrl":"https://doi.org/10.1103/physrevc.110.034305","url":null,"abstract":"The interacting shell model, a configuration-interaction method, is a venerable approach for low-lying nuclear structure calculations, but it is hampered by the exponential growth of its basis dimension as one increases the single-particle space and/or the number of active particles. Recent, quantum-information-inspired work has demonstrated that the proton and neutron sectors of a nuclear wave function are weakly entangled. Furthermore, the entanglement is smaller for nuclides away from <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>N</mi><mo>=</mo><mi>Z</mi></mrow></math>, such as heavy, neutron-rich nuclides. Here we implement a weak entanglement approximation to bipartite configuration-interaction wave functions, approximating low-lying levels by coupling a relatively small number of many-proton and many-neutron states. This truncation scheme, which we present in the context of past approaches, reduces the basis dimension by many orders of magnitude while preserving essential features of nuclear spectra.","PeriodicalId":20122,"journal":{"name":"Physical Review C","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Rotation-vibration model for the chiral doublet bands and wobbling bands in transitional nuclei 过渡核中手性双带和摇摆带的旋转-振动模型
IF 3.1 2区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2024-09-03 DOI: 10.1103/physrevc.110.034301
H. D. Jiang, Y. Zhang, B. Qi, H. Zhang
A collective model Hamiltonian incorporating a βsoft potential is proposed to elucidate phenomena related to triaxiality in transitional systems. The solutions derived from the model built within the core-particle scheme can be approximated using Bessel functions and subsequently applied to describe the exotic high-spin phenomena observed in the A130 mass region. The results indicate that chiral and wobbling rotations in a βsoft system may exhibit robustness against β vibrations, suggesting a collective vibration mechanism for multiple chiral doublet bands and multiple rotation-wobbling bands in triaxial nuclei.
我们提出了一个包含β软势的集合模型哈密顿,以阐明过渡系统中与三轴性有关的现象。在核心粒子方案中建立的模型所得出的解可以用贝塞尔函数来近似,随后应用于描述在 A≈130 质量区观察到的奇异高自旋现象。结果表明,β 软系统中的手性旋转和摆动旋转可能对 β 振动表现出稳健性,这表明三轴原子核中的多重手性双带和多重旋转摆动带具有集体振动机制。
{"title":"Rotation-vibration model for the chiral doublet bands and wobbling bands in transitional nuclei","authors":"H. D. Jiang, Y. Zhang, B. Qi, H. Zhang","doi":"10.1103/physrevc.110.034301","DOIUrl":"https://doi.org/10.1103/physrevc.110.034301","url":null,"abstract":"A collective model Hamiltonian incorporating a <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>β</mi><mtext>−</mtext><mi>soft</mi></mrow></math> potential is proposed to elucidate phenomena related to triaxiality in transitional systems. The solutions derived from the model built within the core-particle scheme can be approximated using Bessel functions and subsequently applied to describe the exotic high-spin phenomena observed in the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>A</mi><mo>≈</mo><mn>130</mn></mrow></math> mass region. The results indicate that chiral and wobbling rotations in a <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>β</mi><mtext>−</mtext><mi>soft</mi></mrow></math> system may exhibit robustness against <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>β</mi></math> vibrations, suggesting a collective vibration mechanism for multiple chiral doublet bands and multiple rotation-wobbling bands in triaxial nuclei.","PeriodicalId":20122,"journal":{"name":"Physical Review C","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Decay of a microsecond seniority 3 isomeric state in Hf155 Hf155 中微秒级 3 异构态的衰变
IF 3.1 2区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2024-09-03 DOI: 10.1103/physrevc.110.034303
B. Alayedet al.
Excited states in the neutron-deficient nuclide Hf155 have been investigated in experiments performed at the Accelerator Laboratory of the University of Jyväskylä. The Hf155 nuclei were produced in fusion-evaporation reactions induced by beams of 295 and 315 MeV Ni58 ions bombarding an isotopically enriched Pd102 target and separated using the recoil mass separator MARA. An isomeric state having a half-life of 510(30) ns was discovered and is interpreted as a seniority υ=3, (πh11/22νf7/2)27/2 configuration. The γ-ray transitions emitted in the deexcitation of the isomeric state to the ground state were identified and a level scheme was constructed, from which the excitation energy of the isomer was determined to be 2581.5(10) keV. A B(E2) value of 0.45(3) W.u. was deduced for the 105.4 keV transition depopulating the isomeric state. The deduced level scheme and B(E2) value are compared with systematics and shell-model calculations.
于韦斯屈莱大学加速器实验室在实验中研究了缺中子核素Hf155的激发态。Hf155 核是在 295 和 315 MeV Ni58 离子束轰击同位素富集的 Pd102 靶件所诱发的聚变-蒸发反应中产生的,并使用反冲质量分离器 MARA 进行分离。发现了一种半衰期为 510(30) ns 的异构态,并将其解释为资历υ=3,(πh11/22⊗νf7/2)27/2-构型。确定了异构态脱激发至基态过程中发射的 γ 射线跃迁,并构建了一个能级方案,由此确定异构态的激发能量为 2581.5(10) keV。推导出异构态的 105.4 keV 转变的 B(E2) 值为 0.45(3) W.u.。推导出的水平方案和 B(E2)值与系统学和壳模型计算结果进行了比较。
{"title":"Decay of a microsecond seniority 3 isomeric state in Hf155","authors":"B. Alayedet al.","doi":"10.1103/physrevc.110.034303","DOIUrl":"https://doi.org/10.1103/physrevc.110.034303","url":null,"abstract":"Excited states in the neutron-deficient nuclide <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mmultiscripts><mi>Hf</mi><mprescripts></mprescripts><none></none><mn>155</mn></mmultiscripts></math> have been investigated in experiments performed at the Accelerator Laboratory of the University of Jyväskylä. The <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mmultiscripts><mi>Hf</mi><mprescripts></mprescripts><none></none><mn>155</mn></mmultiscripts></math> nuclei were produced in fusion-evaporation reactions induced by beams of 295 and 315 MeV <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mmultiscripts><mi>Ni</mi><mprescripts></mprescripts><none></none><mn>58</mn></mmultiscripts></math> ions bombarding an isotopically enriched <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mmultiscripts><mi>Pd</mi><mprescripts></mprescripts><none></none><mn>102</mn></mmultiscripts></math> target and separated using the recoil mass separator MARA. An isomeric state having a half-life of 510(30) ns was discovered and is interpreted as a seniority <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>υ</mi><mo>=</mo><mn>3</mn></mrow><mo>,</mo><mo> </mo><mrow><mrow><mo>(</mo><mi>π</mi><msubsup><mi>h</mi><mrow><mn>11</mn><mo>/</mo><mn>2</mn></mrow><mn>2</mn></msubsup><mo>⊗</mo><mi>ν</mi><msub><mi>f</mi><mrow><mn>7</mn><mo>/</mo><mn>2</mn></mrow></msub><mo>)</mo></mrow><mn>27</mn><mo>/</mo><msup><mn>2</mn><mo>−</mo></msup></mrow></math> configuration. The <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>γ</mi></math>-ray transitions emitted in the deexcitation of the isomeric state to the ground state were identified and a level scheme was constructed, from which the excitation energy of the isomer was determined to be 2581.5(10) keV. A <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>B</mi><mo>(</mo><mi>E</mi><mn>2</mn><mo>)</mo></mrow></math> value of 0.45(3) W.u. was deduced for the 105.4 keV transition depopulating the isomeric state. The deduced level scheme and <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>B</mi><mo>(</mo><mi>E</mi><mn>2</mn><mo>)</mo></mrow></math> value are compared with systematics and shell-model calculations.","PeriodicalId":20122,"journal":{"name":"Physical Review C","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Observation and spectroscopy of the proton-unbound nucleus Al21 质子未结合核 Al21 的观测和光谱学研究
IF 3.1 2区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2024-09-03 DOI: 10.1103/physrevc.110.l031301
D. Kostylevaet al.
We report on the observation of the previously unknown isotope Al21, the first unbound aluminum isotope located beyond the proton dripline. The Al21 nucleus decays by one-proton (1p) emission, and its in-flight decays were detected by tracking trajectories of the decay products with silicon microstrip detectors. The 1p-emission processes were studied by analyzing the measured angular correlations of decay products Mg20+p. The 1p-decay energies of the ground and low-lying excited states of Al21, its mass excess, and the proton separation energy value Sp=1.150.07+0.10 MeV were determined.
我们报告了对以前未知的同位素 Al21 的观测结果,这是位于质子滴线之外的第一个非结合铝同位素。Al21 核通过一质子(1p)发射衰变,其飞行中的衰变是通过硅微带探测器跟踪衰变产物的轨迹探测到的。通过分析测量到的衰变产物 Mg20+p 的角度相关性,对 1p 发射过程进行了研究。测定了 Al21 的基态和低洼激发态的 1p 衰变能量、其质量过量以及质子分离能值 Sp=-1.15-0.07+0.10 MeV。
{"title":"Observation and spectroscopy of the proton-unbound nucleus Al21","authors":"D. Kostylevaet al.","doi":"10.1103/physrevc.110.l031301","DOIUrl":"https://doi.org/10.1103/physrevc.110.l031301","url":null,"abstract":"We report on the observation of the previously unknown isotope <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mmultiscripts><mi>Al</mi><mprescripts></mprescripts><none></none><mn>21</mn></mmultiscripts></math>, the first unbound aluminum isotope located beyond the proton dripline. The <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mmultiscripts><mi>Al</mi><mprescripts></mprescripts><none></none><mn>21</mn></mmultiscripts></math> nucleus decays by one-proton (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>1</mn><mi>p</mi></mrow></math>) emission, and its in-flight decays were detected by tracking trajectories of the decay products with silicon microstrip detectors. The <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>1</mn><mi>p</mi></mrow></math>-emission processes were studied by analyzing the measured angular correlations of decay products <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mmultiscripts><mi>Mg</mi><mprescripts></mprescripts><none></none><mn>20</mn></mmultiscripts><mo>+</mo><mi>p</mi></mrow></math>. The <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>1</mn><mi>p</mi></mrow></math>-decay energies of the ground and low-lying excited states of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mmultiscripts><mi>Al</mi><mprescripts></mprescripts><none></none><mn>21</mn></mmultiscripts></math>, its mass excess, and the proton separation energy value <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msub><mi>S</mi><mi>p</mi></msub><mo>=</mo><mo>−</mo><mn>1</mn><mo>.</mo><msubsup><mn>15</mn><mrow><mo>−</mo><mn>0.07</mn></mrow><mrow><mo>+</mo><mn>0.10</mn></mrow></msubsup></mrow></math> MeV were determined.","PeriodicalId":20122,"journal":{"name":"Physical Review C","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Time-dependent density functional theory study of induced-fission dynamics of Th226 关于 Th226 诱导裂变动力学的时变密度泛函理论研究
IF 3.1 2区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2024-09-03 DOI: 10.1103/physrevc.110.034302
B. Li (李博), D. Vretenar, T. Nikšić, P. W. Zhao (赵鹏巍), J. Meng (孟杰)
A microscopic finite-temperature model based on time-dependent nuclear density functional theory (TDDFT) is employed to study the induced-fission process of Th226. The saddle-to-scission dynamics of this process is explored, starting from various points on the deformation surface of Helmholtz free energy at a temperature that corresponds to the experimental excitation energy, and following self-consistent isentropic fission trajectories as they evolve toward scission. Dissipation effects and the formation of excited fragments are investigated and, in particular, the difference in the evolution of the local temperature along asymmetric and symmetric fission trajectories is studied. The relative entropies and entanglement between fission fragments emerging at scission are analyzed.
我们采用了基于时间相关核密度泛函理论(TDDFT)的微观有限温度模型来研究 Th226 的诱导裂变过程。在与实验激发能量相对应的温度下,从赫尔姆霍兹自由能变形面上的不同点开始,沿着自洽的等熵裂变轨迹向裂变方向演化,探索了这一过程的鞍到裂变动力学。研究了耗散效应和受激碎片的形成,特别是沿不对称裂变轨迹和对称裂变轨迹局部温度演化的差异。分析了裂变时出现的裂变碎片之间的相对熵和纠缠。
{"title":"Time-dependent density functional theory study of induced-fission dynamics of Th226","authors":"B. Li (李博), D. Vretenar, T. Nikšić, P. W. Zhao (赵鹏巍), J. Meng (孟杰)","doi":"10.1103/physrevc.110.034302","DOIUrl":"https://doi.org/10.1103/physrevc.110.034302","url":null,"abstract":"A microscopic finite-temperature model based on time-dependent nuclear density functional theory (TDDFT) is employed to study the induced-fission process of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mmultiscripts><mi>Th</mi><mprescripts></mprescripts><none></none><mn>226</mn></mmultiscripts></math>. The saddle-to-scission dynamics of this process is explored, starting from various points on the deformation surface of Helmholtz free energy at a temperature that corresponds to the experimental excitation energy, and following self-consistent isentropic fission trajectories as they evolve toward scission. Dissipation effects and the formation of excited fragments are investigated and, in particular, the difference in the evolution of the local temperature along asymmetric and symmetric fission trajectories is studied. The relative entropies and entanglement between fission fragments emerging at scission are analyzed.","PeriodicalId":20122,"journal":{"name":"Physical Review C","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
High-resolution spectroscopy of neutron-rich Br isotopes and signatures for a prolate-to-oblate shape transition at N=56 富中子 Br 同位素的高分辨率光谱学以及 N=56 处从长方形到扁平形转变的特征
IF 3.1 2区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2024-09-03 DOI: 10.1103/physrevc.110.034304
J. Dudouetet al.
The first systematic experimental study of the neutron-rich Br isotopes with two complementary state-of-the-art techniques is presented. These isotopes were populated in the fission process at two different facilities, GANIL and ILL. New spectroscopic information was obtained for odd-even Br8793 isotopes and the experimental results were compared with state-of-the-art large scale shell model (LSSM) and discrete nonorthogonal (DNO) shell model calculations. As a result of such theoretical approaches, a transition from prolate (Br87,89) to oblate (Br91,93) shapes is obtained from the subtle balance between proton and neutron quadrupole deformations, as a clear signature of a pseudo-SU3 quadrupole regime.
本文首次利用两种互补的先进技术对富中子溴同位素进行了系统的实验研究。这些同位素是在 GANIL 和 ILL 两个不同设施的裂变过程中填充的。获得了奇偶 Br87-93 同位素的新光谱信息,并将实验结果与最先进的大规模壳模型(LSSM)和离散非正交(DNO)壳模型计算结果进行了比较。由于采用了这些理论方法,质子和中子四极子变形之间的微妙平衡产生了从长形(Br87,89)到扁圆形(Br91,93)的过渡,这是伪苏 3 四极子机制的一个明显特征。
{"title":"High-resolution spectroscopy of neutron-rich Br isotopes and signatures for a prolate-to-oblate shape transition at N=56","authors":"J. Dudouetet al.","doi":"10.1103/physrevc.110.034304","DOIUrl":"https://doi.org/10.1103/physrevc.110.034304","url":null,"abstract":"The first systematic experimental study of the neutron-rich Br isotopes with two complementary state-of-the-art techniques is presented. These isotopes were populated in the fission process at two different facilities, GANIL and ILL. New spectroscopic information was obtained for odd-even <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mmultiscripts><mi>Br</mi><mprescripts></mprescripts><none></none><mrow><mn>87</mn><mo>–</mo><mn>93</mn></mrow></mmultiscripts></math> isotopes and the experimental results were compared with state-of-the-art large scale shell model (LSSM) and discrete nonorthogonal (DNO) shell model calculations. As a result of such theoretical approaches, a transition from prolate (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mmultiscripts><mi>Br</mi><mprescripts></mprescripts><none></none><mrow><mn>87</mn><mo>,</mo><mn>89</mn></mrow></mmultiscripts></math>) to oblate (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mmultiscripts><mi>Br</mi><mprescripts></mprescripts><none></none><mrow><mn>91</mn><mo>,</mo><mn>93</mn></mrow></mmultiscripts></math>) shapes is obtained from the subtle balance between proton and neutron quadrupole deformations, as a clear signature of a pseudo-SU3 quadrupole regime.","PeriodicalId":20122,"journal":{"name":"Physical Review C","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Antiflow of mesons in the high baryon density region 高重子密度区介子的反向流动
IF 3.1 2区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2024-09-03 DOI: 10.1103/physrevc.110.034903
Zuo-Wen Liu, Shusu Shi
The E895 and STAR experiments demonstrate that the slopes of directed flow with respect to rapidity (<math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>d</mi><msub><mi>v</mi><mn>1</mn></msub><msub><mrow><mo>/</mo><mi>d</mi><mi>y</mi><mo>|</mo></mrow><mrow><mi>y</mi><mo>=</mo><mn>0</mn></mrow></msub></mrow></math>) of mesons are negative in the low transverse momentum (<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>p</mi><mi>T</mi></msub></math>) region, <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi>p</mi><mi>T</mi></msub><mo><</mo><mn>0.8</mn><mspace width="4pt"></mspace><mi>GeV</mi><mo>/</mo><mi>c</mi></mrow></math>, in <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>Au</mi><mo>+</mo><mi>Au</mi></mrow></math> collisions at <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msqrt><msub><mi>s</mi><mrow><mi>N</mi><mi>N</mi></mrow></msub></msqrt><mo>=</mo><mn>3.0</mn><mo>–</mo><mn>3.9</mn><mspace width="4pt"></mspace><mi>GeV</mi></mrow></math>. Using the transport model JAM, we investigate the directed flow of <math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi>π</mi><mo>±</mo></msup><mo>,</mo><mo> </mo><msup><mi>K</mi><mo>±</mo></msup></math>, and <math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi>K</mi><mn>0</mn></msup></math> as functions of rapidity, <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>p</mi><mi>T</mi></msub></math>, and collision energy in <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>Au</mi><mo>+</mo><mi>Au</mi></mrow></math> collisions at the same energies as those in the E895 and STAR experiments. We find that the JAM model can qualitatively reproduce the antiflow of <math xmlns="http://www.w3.org/1998/Math/MathML"><msubsup><mi>K</mi><mi>S</mi><mn>0</mn></msubsup></math> observed in the E895 experiment. The <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>v</mi><mn>1</mn></msub></math> slopes of pions and kaons are analyzed as functions of the <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>p</mi><mi>T</mi></msub></math> window, revealing a strong <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>p</mi><mi>T</mi></msub></math> dependence of the <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>v</mi><mn>1</mn></msub></math> slopes. Negative <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>v</mi><mn>1</mn></msub></math> slopes are observed in the low <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>p</mi><mi>T</mi></msub></math> region, <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi>p</mi><mi>T</mi></msub><mo><</mo><mn>0.8</mn><mspace width="4pt"></mspace><mi>GeV</mi><mo>/</mo><mi>c</mi></mrow></math>, while positive slopes are shown in the higher <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>p</mi><mi>T</mi></msub></math> region. We find that the shadowing effect from spectators is crucial in generating the antiflow of mesons at low <math xmln
E895和STAR实验证明,在sNN=3.0-3.9GeV的Au+Au对撞中,介子的定向流在低横动量(pT)区(pT<0.8GeV/c)的速率(dv1/dy|y=0)为负斜率。利用输运模型 JAM,我们研究了在与 E895 和 STAR 实验能量相同的 Au+Au 对撞中,π±、K± 和 K0 的定向流动与速度、pT 和碰撞能量的函数关系。我们发现,JAM 模型可以定性地再现 E895 实验中观测到的 KS0 逆流。我们分析了负离子和高子的 v1 斜率与 pT 窗口的函数关系,发现 v1 斜率与 pT 有很强的相关性。在低 pT 区域(pT<0.8GeV/c)观察到负的 v1 斜率,而在高 pT 区域则观察到正的 v1 斜率。我们发现,在高重子密度区的低 pT 下,来自旁观者的阴影效应对介子反向流动的产生至关重要。
{"title":"Antiflow of mesons in the high baryon density region","authors":"Zuo-Wen Liu, Shusu Shi","doi":"10.1103/physrevc.110.034903","DOIUrl":"https://doi.org/10.1103/physrevc.110.034903","url":null,"abstract":"The E895 and STAR experiments demonstrate that the slopes of directed flow with respect to rapidity (&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mrow&gt;&lt;mi&gt;d&lt;/mi&gt;&lt;msub&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;mi&gt;d&lt;/mi&gt;&lt;mi&gt;y&lt;/mi&gt;&lt;mo&gt;|&lt;/mo&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;y&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;) of mesons are negative in the low transverse momentum (&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msub&gt;&lt;mi&gt;p&lt;/mi&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt;) region, &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;p&lt;/mi&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/msub&gt;&lt;mo&gt;&lt;&lt;/mo&gt;&lt;mn&gt;0.8&lt;/mn&gt;&lt;mspace width=\"4pt\"&gt;&lt;/mspace&gt;&lt;mi&gt;GeV&lt;/mi&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;, in &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mrow&gt;&lt;mi&gt;Au&lt;/mi&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;mi&gt;Au&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt; collisions at &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mrow&gt;&lt;msqrt&gt;&lt;msub&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;mrow&gt;&lt;mi&gt;N&lt;/mi&gt;&lt;mi&gt;N&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/msqrt&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;3.0&lt;/mn&gt;&lt;mo&gt;–&lt;/mo&gt;&lt;mn&gt;3.9&lt;/mn&gt;&lt;mspace width=\"4pt\"&gt;&lt;/mspace&gt;&lt;mi&gt;GeV&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;. Using the transport model JAM, we investigate the directed flow of &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msup&gt;&lt;mi&gt;π&lt;/mi&gt;&lt;mo&gt;±&lt;/mo&gt;&lt;/msup&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mo&gt; &lt;/mo&gt;&lt;msup&gt;&lt;mi&gt;K&lt;/mi&gt;&lt;mo&gt;±&lt;/mo&gt;&lt;/msup&gt;&lt;/math&gt;, and &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msup&gt;&lt;mi&gt;K&lt;/mi&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/msup&gt;&lt;/math&gt; as functions of rapidity, &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msub&gt;&lt;mi&gt;p&lt;/mi&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt;, and collision energy in &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mrow&gt;&lt;mi&gt;Au&lt;/mi&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;mi&gt;Au&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt; collisions at the same energies as those in the E895 and STAR experiments. We find that the JAM model can qualitatively reproduce the antiflow of &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msubsup&gt;&lt;mi&gt;K&lt;/mi&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/msubsup&gt;&lt;/math&gt; observed in the E895 experiment. The &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msub&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt; slopes of pions and kaons are analyzed as functions of the &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msub&gt;&lt;mi&gt;p&lt;/mi&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt; window, revealing a strong &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msub&gt;&lt;mi&gt;p&lt;/mi&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt; dependence of the &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msub&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt; slopes. Negative &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msub&gt;&lt;mi&gt;v&lt;/mi&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/msub&gt;&lt;/math&gt; slopes are observed in the low &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msub&gt;&lt;mi&gt;p&lt;/mi&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt; region, &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mi&gt;p&lt;/mi&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/msub&gt;&lt;mo&gt;&lt;&lt;/mo&gt;&lt;mn&gt;0.8&lt;/mn&gt;&lt;mspace width=\"4pt\"&gt;&lt;/mspace&gt;&lt;mi&gt;GeV&lt;/mi&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;, while positive slopes are shown in the higher &lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;msub&gt;&lt;mi&gt;p&lt;/mi&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/msub&gt;&lt;/math&gt; region. We find that the shadowing effect from spectators is crucial in generating the antiflow of mesons at low &lt;math xmln","PeriodicalId":20122,"journal":{"name":"Physical Review C","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Role of initial transverse momentum in a hybrid approach 混合方法中初始横动量的作用
IF 3.1 2区 物理与天体物理 Q1 Physics and Astronomy Pub Date : 2024-09-03 DOI: 10.1103/physrevc.110.034901
Niklas Götz, Lucas Constantin, Hannah Elfner
Background: Significant theoretical uncertainties exist with respect to the initial condition of the hydrodynamic description of ultrarelativistic heavy-ion collisions. Several approaches exist, of which some contain initial momentum information. Its impact is commonly assumed to be small and final flow is seen as a linear response to the initial-state eccentricity.
背景:关于超相对论重离子碰撞流体力学描述的初始条件,存在着重大的理论不确定性。有几种方法,其中一些包含初始动量信息。通常假定其影响较小,最终流被视为对初始状态偏心率的线性响应。
{"title":"Role of initial transverse momentum in a hybrid approach","authors":"Niklas Götz, Lucas Constantin, Hannah Elfner","doi":"10.1103/physrevc.110.034901","DOIUrl":"https://doi.org/10.1103/physrevc.110.034901","url":null,"abstract":"<b>Background:</b> Significant theoretical uncertainties exist with respect to the initial condition of the hydrodynamic description of ultrarelativistic heavy-ion collisions. Several approaches exist, of which some contain initial momentum information. Its impact is commonly assumed to be small and final flow is seen as a linear response to the initial-state eccentricity.","PeriodicalId":20122,"journal":{"name":"Physical Review C","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142187000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
期刊
Physical Review C
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1