Nuclear Physics A最新文献_第7页

Evaluation of 180mTa formation cross-sections in photoneutron reactions 光中子反应中 180mTa 形成截面的评估

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2024-02-28 DOI: 10.1016/j.nuclphysa.2024.122846

R.V. Avetisyan, A.G. Barseghyan, Yu.A. Gharibyan, A.V. Gyurjinyan, H.A. Mkrtchyan, A.Yu. Petrosyan, I.A. Kerobyan

{"title":"Evaluation of 180mTa formation cross-sections in photoneutron reactions","authors":"R.V. Avetisyan, A.G. Barseghyan, Yu.A. Gharibyan, A.V. Gyurjinyan, H.A. Mkrtchyan, A.Yu. Petrosyan, I.A. Kerobyan","doi":"10.1016/j.nuclphysa.2024.122846","DOIUrl":"10.1016/j.nuclphysa.2024.122846","url":null,"abstract":"<div>Determining the relative production cross-sections of the short-lived (ground) and long- lived (metastable) states of 180Ta is integral in nuclear physics research. However, direct measurement of these cross-sections is challenging. In this study, we proposed a method for estimating the total flux-weighted average formation cross-section of 180m+gTa based on GEANT4 modeling to evaluate the short-lived (ground) and long-lived (metastable) states of 180Ta. A Ta target was irradiated by a bremsstrahlung photon beam (maximum electron energy: 20 MeV) obtained from the linear electron accelerator LUE-75 at the A.I. Alikhanyan National Science Laboratory (AANL), Armenia. The experiment was performed using the activation technique, and the proposed GEANT4 simulation-based method was employed to evaluate the flux-weighted average formation cross-section of 180mTa. In addition, the isomeric cross-section ratio for the 180m,gTa isomeric pair was calculated. The theoretical results obtained using the TALYS 1.96 and EMPIRE 3.2 codes were consistent with the experimental ones. To the best of the authors’ knowledge, this paper reports the estimated flux-weighted average formation cross-section of 180mTa and isomer ratio for the 180m,gTa isomeric pair, induced by the irradiation of a bremsstrahlung beam with an end-point energy of 20 MeV, for the first time. This study opens new avenues for determining the relative production cross-sections of the ground and metastable states of 180Ta, which is widely studied as a natural isomeric target in various fields, including nuclear transformation reactions, fission dynamics, etc.</div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140045947","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

Correlation between the shape coexistence and stability in Mo and Ru isotopes Mo 和 Ru 同位素形状共存与稳定性之间的相关性

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2024-02-21 DOI: 10.1016/j.nuclphysa.2024.122843

Mamta Aggarwal , G. Saxena , Pranali Parab

{"title":"Correlation between the shape coexistence and stability in Mo and Ru isotopes","authors":"Mamta Aggarwal , G. Saxena , Pranali Parab","doi":"10.1016/j.nuclphysa.2024.122843","DOIUrl":"10.1016/j.nuclphysa.2024.122843","url":null,"abstract":"<div>In a rapidly changing shape phase region, the presence of shape coexistence and its possible impact on the decay modes and half-lives, has been explored in astrophysically interesting Mo and Ru isotopes, in an extensive study within the microscopic theoretical framework using Nilsson Strutinsky Method and Relativistic Mean Field Model. The isotopic chains of Mo and Ru exhibit rapid shape phase transitions, triaxial γ softness, shape instability along with many coexisting states mostly with oblate and triaxial shapes. Proton and neutron separation energies have been calculated and compared with the available data. Results obtained from both the formalisms are in good agreement with each other as well as the available experimental data. Our computed β-decay half-lives and separation energy for nuclei exhibiting shape coexistence were examined for the decay mode from second minima state of the parent nuclei to the ground or excited state of the daughter nuclei. The second minima state of the coexisting shapes in Mo and Ru isotopes, were seen to impact the structural properties, β-decay half-lives, separation energy and hence the stability of the nuclei.</div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139918274","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

Heavy hadron production through pair annihilation in the ordinary and noncommutative SM 在普通和非交换 SM 中通过成对湮灭产生重强子

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2024-02-19 DOI: 10.1016/j.nuclphysa.2024.122844

S. Mohammad Moosavi Nejad, Vahid Ekraminasab

{"title":"Heavy hadron production through pair annihilation in the ordinary and noncommutative SM","authors":"S. Mohammad Moosavi Nejad, Vahid Ekraminasab","doi":"10.1016/j.nuclphysa.2024.122844","DOIUrl":"https://doi.org/10.1016/j.nuclphysa.2024.122844","url":null,"abstract":"<div>Different processes have been yet studied in the noncommutative standard model (NCSM) and various limits on the scale of noncommutative parameter have been determined. In the present work we, for the first time, investigate the production process of heavy hadrons through pair annihilation in the NCSM using Seiberg-Witten maps to the second-order of noncommutative parameter <math><msup><mrow><mi>Θ</mi></mrow><mrow><mi>μ</mi><mi>ν</mi></mrow></msup></math>. Having experimental data from Belle and OPAL Collaborations for inclusive production of B-mesons we will determine a low limit for the noncommutative scale <math><msub><mrow><mi>Λ</mi></mrow><mrow><mi>N</mi><mi>C</mi></mrow></msub></math>. The effects of noncommutativity will be imposed both on the differential cross section at the parton level (<math><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>→</mo><mi>q</mi><mover><mrow><mi>q</mi></mrow><mrow><mo>¯</mo></mrow></mover></math>) and the fragmentation function of <math><mi>q</mi><mo>/</mo><mover><mrow><mi>q</mi></mrow><mrow><mo>¯</mo></mrow></mover><mo>→</mo><mi>B</mi></math> so that the limit <math><msub><mrow><mi>Λ</mi></mrow><mrow><mi>N</mi><mi>C</mi></mrow></msub><mo>></mo><mn>1.10</mn></math> TeV is determined. Using analytical result for the pair annihilation cross section we will also predict the production rate of <math><msub><mrow><mi>B</mi></mrow><mrow><mi>c</mi></mrow></msub></math> mesons in future electron-positron international linear collider (ILC).</div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139915523","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

Systematic shell-model study for structure and isomeric states in 200−210Po isotopes 关于 200-210Po 同位素结构和同分异构态的系统壳模型研究

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2024-02-08 DOI: 10.1016/j.nuclphysa.2024.122842

Sakshi Shukla , Praveen C. Srivastava , Kosuke Nomura , Larry Zamick

引用次数: 0

Microscopic study of ground–state binding energies in Z = 52 − 70 neutron–rich nuclei Z = 52 - 70 富中子原子核基态结合能的微观研究

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2024-02-06 DOI: 10.1016/j.nuclphysa.2024.122841

Mojgan Abolghasem , Petr Alexa

引用次数: 0

Cross section measurements of 27Al(γ, x)24Na reactions as monitors for laser-driven bremsstrahlung γ-ray 作为激光驱动轫致辐射γ射线监测器的 27Al(γ, x)24Na 反应截面测量结果

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2024-01-26 DOI: 10.1016/j.nuclphysa.2024.122834

M.Z. Wang , D. Wu , H.Y. Lan , J.Y. Zhang , J.X. Liu , H.G. Lu , J.F. Lv , X.Z. Wu , H. Zhang , J. Cai , Q.Y. Ma , Y.H. Xia , Z.N. Wang , Z.Y. Yang , X.L. Xu , Y.X. Geng , Y.Y. Zhao , H.R. Wang , F.L. Liu , J.Q. Yu , X.Q. Yan

{"title":"Cross section measurements of 27Al(γ, x)24Na reactions as monitors for laser-driven bremsstrahlung γ-ray","authors":"M.Z. Wang , D. Wu , H.Y. Lan , J.Y. Zhang , J.X. Liu , H.G. Lu , J.F. Lv , X.Z. Wu , H. Zhang , J. Cai , Q.Y. Ma , Y.H. Xia , Z.N. Wang , Z.Y. Yang , X.L. Xu , Y.X. Geng , Y.Y. Zhao , H.R. Wang , F.L. Liu , J.Q. Yu , X.Q. Yan","doi":"10.1016/j.nuclphysa.2024.122834","DOIUrl":"10.1016/j.nuclphysa.2024.122834","url":null,"abstract":"<div>The accurate monitors of the electron beams and γ-ray fluxes are very important for laser-driven photonuclear studies. The flux-weighted average cross sections and average cross sections per equivalent quantum of 27Al(<math><mi>γ</mi><mo>,</mo><mspace></mspace><mi>x</mi><mo>;</mo><mspace></mspace><mi>x</mi><mspace></mspace><mo>=</mo><mspace></mspace><mn>2</mn><mi>p</mi><mi>n</mi><mo>,</mo><mspace></mspace><mi>p</mi><mi>d</mi><mo>,</mo><mspace></mspace><mmultiscripts><mrow><mi>H</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>3</mn></mrow></mmultiscripts><mi>e</mi></math>)24Na reactions were measured above the giant dipole resonance region through activation methods. Laser-driven ultra-intense bremsstrahlung γ-rays, generated by laser wakefield accelerated quasi-monoenergetic electrons, were used in the experiment at the 200 TW laser facility of the Compact Laser Plasma Accelerator Laboratory, Peking University. The results demonstrated good agreement with previous works and were compared with theoretical values given by TALYS 1.9 calculations. The experimental cross sections were confirmed to be 2.4 times higher than TALYS 1.9 with default options. This work proved the feasibility of using the 27Al(<math><mi>γ</mi><mo>,</mo><mspace></mspace><mi>x</mi></math>)24Na reactions as monitors for laser wakefield accelerated electrons and their bremsstrahlung γ-ray fluxes.</div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139579831","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

Activation cross sections of proton induced nuclear reactions on tungsten: Special regard to the formation of 186Re 钨上质子诱导核反应的活化截面：特别关注 186Re 的形成

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2024-01-26 DOI: 10.1016/j.nuclphysa.2024.122833

B.M. Ali , Gehan Y. Mohamed , M. Al-Abyad

引用次数: 0

Estimation of the slope of nuclear symmetry energy via charge radii of mirror nuclei 通过镜像核的电荷半径估算核对称性能量的斜率

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2024-01-24 DOI: 10.1016/j.nuclphysa.2024.122832

Sakshi Gautam , Anagh Venneti , Sarmistha Banik , B.K. Agrawal

{"title":"Estimation of the slope of nuclear symmetry energy via charge radii of mirror nuclei","authors":"Sakshi Gautam , Anagh Venneti , Sarmistha Banik , B.K. Agrawal","doi":"10.1016/j.nuclphysa.2024.122832","DOIUrl":"10.1016/j.nuclphysa.2024.122832","url":null,"abstract":"<div>Charge radii of mirror nuclei are calculated by implementing pairing effects with the Hartree-Fock Bogoliubov approximation. Correlations between the difference of charge radii (<math><mi>Δ</mi><msub><mrow><mi>R</mi></mrow><mrow><mi>c</mi><mi>h</mi></mrow></msub></math>) and slope of nuclear symmetry energy (L) are examined for different mirror nuclei pairs of varying masses using 40 different Skyrme energy density functionals. <math><mi>Δ</mi><msub><mrow><mi>R</mi></mrow><mrow><mi>c</mi><mi>h</mi></mrow></msub><mo>−</mo><mi>L</mi></math> correlations are found to be robust for the binding constraints imposed on density functionals. We observe that <math><mi>Δ</mi><msub><mrow><mi>R</mi></mrow><mrow><mi>c</mi><mi>h</mi></mrow></msub></math> and L show relatively better correlations in relatively heavier pairs than those obtained in the lighter pairs. Our calculations impose a constraint on the slope of nuclear symmetry energy as -20 MeV ≤L≤ 55 MeV with 68% confidence band using available measurements on charge radii. This is a moderately soft symmetry energy, in contrast to stiff and soft symmetry energy indicated by PREX-II and CREX measurements of neutron skin thickness in <math><mmultiscripts><mrow><mi>P</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>208</mn></mrow></mmultiscripts><mi>b</mi></math> and <math><mmultiscripts><mrow><mi>C</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>48</mn></mrow></mmultiscripts><mi>a</mi></math>, respectively. Our result is also in agreement with celestial constraints obtained from observational data for neutron stars.</div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139560798","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

Deuteron system in finite volume with particle-dimer picture 有限体积中的氘核系统与粒子二聚体图像

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2024-01-11 DOI: 10.1016/j.nuclphysa.2024.122829

Li-Tan Li, Jin-Yi Pang

{"title":"Deuteron system in finite volume with particle-dimer picture","authors":"Li-Tan Li, Jin-Yi Pang","doi":"10.1016/j.nuclphysa.2024.122829","DOIUrl":"10.1016/j.nuclphysa.2024.122829","url":null,"abstract":"<div>This article delves into the application of Dimer images in addressing two-body problems within lattice quantum chromodynamics (LQCD), providing the finite volume energy spectrum of deuterons in the context of <math><mmultiscripts><mrow><mi>S</mi></mrow><mrow><mn>1</mn></mrow><none></none><mprescripts></mprescripts><none></none><mrow><mn>3</mn></mrow></mmultiscripts></math>-<math><mmultiscripts><mrow><mi>D</mi></mrow><mrow><mn>1</mn></mrow><none></none><mprescripts></mprescripts><none></none><mrow><mn>3</mn></mrow></mmultiscripts></math> coupled-channels. The author commences by introducing the Dimer-particle method and formulating the Lagrangian for the scattering of two fermions. Additionally, the author defines the relativistic high partial zeta-function in a moving reference system and outlines a method for its rapid convergence calculation. The article further scrutinizes zeta-function representations across various momentum shells and discusses issues related to symmetry breakdown in specific momentum configurations. In sum, this work presents innovative methods for incorporating spin and isospin indices into dimer models, thereby establishing closer relevance to LQCD and deuteron studies.</div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139465156","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

Shape evolution and shape coexistence in even-even Mo isotopic chain 偶偶摩同位素链的形状演变和形状共存

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2024-01-11 DOI: 10.1016/j.nuclphysa.2024.122831

Y. El Bassem , M. El Adri , A. El Batoul , M. Oulne

引用次数: 0