Nuclear Physics A最新文献_第7页

Structure of negative-parity states in 71Ga 71Ga负宇称态的结构

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-31 DOI: 10.1016/j.nuclphysa.2025.123185

Amir Jalili , H.T. Fortune , Bingcheng He , Yan-An Luo , Hadi Sobhani , Ai.Xi. Chen , Feng Pan

引用次数: 0

Shell effects in quasi-fission: Reactions forming actinide and superheavy compound nuclei 准裂变中的壳层效应：形成锕系和超重复合核的反应

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-28 DOI: 10.1016/j.nuclphysa.2025.123170

C. Simenel , K. Godbey , H. Lee , P. McGlynn , A.S. Umar

引用次数: 0

Excitation functions of (α,xn) reactions in natural Sb 天然Sb中（α,xn）反应的激发函数

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-26 DOI: 10.1016/j.nuclphysa.2025.123171

Pankaj K. Giri , Sandipan Dasgupta , A. Sharma , S. Kundu , A. Das , S.S. Ghugre , G. Mukherjee , S. Bhattacharyya , J. Datta , R. Raut

{"title":"Excitation functions of (α,xn) reactions in natural Sb","authors":"Pankaj K. Giri , Sandipan Dasgupta , A. Sharma , S. Kundu , A. Das , S.S. Ghugre , G. Mukherjee , S. Bhattacharyya , J. Datta , R. Raut","doi":"10.1016/j.nuclphysa.2025.123171","DOIUrl":"10.1016/j.nuclphysa.2025.123171","url":null,"abstract":"<div><div>This paper reports cross-section measurements of the <span><math><msup><mrow></mrow><mrow><mi>n</mi><mi>a</mi><mi>t</mi><mo>.</mo></mrow></msup></math></span>Sb(<em>α</em>,xn)<sup>121,123,124</sup>I reactions, at energies <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>α</mi></mrow></msub></math></span> = 40-50 MeV, using the target activation technique. The experimental results have been compared with theoretical excitation functions calculated in the Talys-2.0 framework. The reaction model parameters such as the Optical Model Potential (OMP), Level Density (LD), Pre-equilibrium Emission (PE) and Photon Strength Function (PSF) have been optimized for maximum overlap between the calculated and the experimental cross sections. Such endeavors are expected to facilitate insights and understanding of the different reaction mechanisms and associated parameters that impact the yields of the products. The validated datasets, resulting therefrom, could go a long way in deciding on the conditions for producing radioisotopes of utility in varied domains such as medicine and industry.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1062 ","pages":"Article 123171"},"PeriodicalIF":1.7,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146913","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

Macroscopic-microscopic analysis of deformation energy, Q20 electric quadrupole moments, and equilibrium shapes in even-even barium and cerium isotopes 变形能的宏观-微观分析，Q20电四极矩，平衡形状在偶数钡和铈同位素

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-23 DOI: 10.1016/j.nuclphysa.2025.123172

Hadj Mouloudj , Fethi Redjem , Oussama Zeggai , Mousaab Belarbi , Youcef Belgaid , Abdelkader Ghalem

{"title":"Macroscopic-microscopic analysis of deformation energy, Q20 electric quadrupole moments, and equilibrium shapes in even-even barium and cerium isotopes","authors":"Hadj Mouloudj , Fethi Redjem , Oussama Zeggai , Mousaab Belarbi , Youcef Belgaid , Abdelkader Ghalem","doi":"10.1016/j.nuclphysa.2025.123172","DOIUrl":"10.1016/j.nuclphysa.2025.123172","url":null,"abstract":"<div><div>This study investigates the electric quadrupole moments (Q<sub>20</sub>) and deformation energies of even-even nuclei within the mass range 114 ≤ <em>A</em> ≤ 140, focusing on Barium and Cerium isotopes. A macroscopic-microscopic approach is employed, combining the liquid drop model for macroscopic energy with Strutinsky shell corrections and BCS (<em>Bardeen-Cooper-Schrieffer</em>) pairing correlations for microscopic refinements. The shell corrections are derived by solving a Schrödinger equation with a deformed Woods–Saxon mean field. Numerical solutions, performed using an optimized FORTRAN program, identify equilibrium shapes by locating energy minima in deformation energy contour plots. From these equilibrium shapes, single-particle wave functions and the BCS approximation are used to calculate electric quadrupole moments. Theoretical results align closely with experimental data, confirming the robustness of the proposed model. This study advances our understanding of nuclear deformation and structure, particularly in isotopes far from spherical symmetry.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1062 ","pages":"Article 123172"},"PeriodicalIF":1.7,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146912","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

What's new? An ab initio investigation of the 3He-4He radiative capture into 7Be 有什么新鲜事吗?3He-4He辐射俘获7Be的从头算研究

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-23 DOI: 10.1016/j.nuclphysa.2025.123158

M.C. Atkinson , K. Kravvaris , S. Quaglioni , P. Navrátil

引用次数: 0

Study of β-decay properties of N = 81 & 82 isotones N = 81和82等音的β衰变性质研究

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-21 DOI: 10.1016/j.nuclphysa.2025.123169

Jameel-Un Nabi, Abuzar, Arslan Mehmood

{"title":"Study of β-decay properties of N = 81 & 82 isotones","authors":"Jameel-Un Nabi, Abuzar, Arslan Mehmood","doi":"10.1016/j.nuclphysa.2025.123169","DOIUrl":"10.1016/j.nuclphysa.2025.123169","url":null,"abstract":"<div><div>The <em>r</em>-process is the producer of about 50% total heavy elements existing beyond iron and plays a key role in the neutronization of massive stars and heavier nuclei. <em>β</em>-decay properties of waiting-point nuclei are necessary to determine the <em>r</em>-process path. In this investigation, we study the <em>β</em>-decay properties of <em>N</em> = 81 and 82 neutron-rich nuclei having <em>Z</em> = (42 - 49). We employ the proton-neutron Quasiparticle Random Phase Approximation (pn-QRPA) model to calculate Gamow-Teller transitions, <em>β</em>-decay half-lives, neutron emission probabilities and stellar rates of these neutron-rich isotones. Our investigation includes only allowed transitions. We compare our results with previous calculations and measured data where available. Our model reproduced 100% (82%) terrestrial <em>β</em>-decay half-lives within a factor 10 (2). Our model predictions are in decent agreement with the experimental data. We present the stellar weak rates of these neutron-rich nuclei for the first time. The calculated weak rates were found to be impactful only at low densities (≤ 10<sup>7</sup> gcm<sup>−3</sup>) or high temperatures (∼ 30 GK) of the stellar core. The reported stellar rates could prove useful for <em>r</em>-process nucleosynthesis calculations and simulations of late time stellar evolution.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1062 ","pages":"Article 123169"},"PeriodicalIF":1.7,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124293","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

Symplectic symmetry approach to multicluster nuclear systems: The case of 16O 多簇核系统的辛对称方法：以16O为例

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-19 DOI: 10.1016/j.nuclphysa.2025.123162

H.G. Ganev

引用次数: 0

A new determination of the (Z,A) dependence of coherent muon-to-electron conversion 相干介子-电子转换（Z，A）依赖性的新测定

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-16 DOI: 10.1016/j.nuclphysa.2025.123161

Léo Borrel, David G. Hitlin, Sophie Middleton

{"title":"A new determination of the (Z,A) dependence of coherent muon-to-electron conversion","authors":"Léo Borrel, David G. Hitlin, Sophie Middleton","doi":"10.1016/j.nuclphysa.2025.123161","DOIUrl":"10.1016/j.nuclphysa.2025.123161","url":null,"abstract":"<div><div>Should muon-to-electron conversion in the field of a nucleus be found in the current generation of experiments, the measurement of the atomic number dependence of the process will become an important experimental goal. We present a new treatment of the (Z,A) dependence of coherent muon-to-electron conversion in 236 isotopes. Our approach differs from previous treatments in several ways. Firstly, we include the effect of permanent quadrupole deformation on the charged lepton flavor violating matrix elements, using the method of Barrett moments. This method also enables the addition of muonic X-ray nuclear size and shape determinations of the charge distribution to the electron scattering results used previously. Secondly, we employ the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) to calculate neutron-related matrix elements for even-even nuclei. This takes into account the quadrupole deformation of the neutron distributions and the fact that neutrons are, in general, in different shell model orbits than protons. The calculated conversion rates differ from previous calculations, particularly in the region of large permanent quadrupole deformation. Finally, we propose an alternative normalization of the muon-to-electron conversion rate, which is related more closely to what a given experiment actually measures, and better separates lepton physics from nuclear physics effects.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1062 ","pages":"Article 123161"},"PeriodicalIF":1.7,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099660","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

Microscopic insights into the structure of even-even 144−148Ce isotopes 144−148Ce同位素的微观结构

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-15 DOI: 10.1016/j.nuclphysa.2025.123156

Umera Nawaz , Manvi Rajput , Suram Singh , G.H. Bhat , Arun Bharti , J.A. Sheikh

引用次数: 0

Probing the pygmy dipole resonance of 50Ca by Coulomb excitation 用库仑激发探测50Ca的矮偶极子共振

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-13 DOI: 10.1016/j.nuclphysa.2025.123152

J. Lemarié , Y. Togano , T. Nakamura , T. Kobayashi , T. Aumann , H. Baba , K. Boretzky , A. Bracco , F. Browne , F. Camera , H. Chae , S. Chan , N. Chiga , H. Choi , L. Cortés , F. Delaunay , D. Dell'Aquila , Z. Elekes , Y. Fujino , I. Gašparić , K. Yoneda

引用次数: 0