Nuclear Physics A最新文献_第10页

A model-independent irreducible tensor formalism to analyse the sequential decays of the triple strange process p¯p→Ω¯+Ω−→K+Λ¯K−Λ→K+p¯π+K−pπ− 用模型无关的不可约张量形式分析三重奇异过程p¯p→Ω¯+Ω−→K+Λ¯K−Λ→K+p¯π+K−pπ−的顺序衰减

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2023-11-22 DOI: 10.1016/j.nuclphysa.2023.122797

Deepak Pachattu

引用次数: 0

Constraints on density dependent MIT bag model parameters for quark and hybrid stars 夸克星与杂化星密度相关的MIT袋模型参数约束

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2023-11-17 DOI: 10.1016/j.nuclphysa.2023.122796

Soumen Podder , Suman Pal , Debashree Sen , Gargi Chaudhuri

{"title":"Constraints on density dependent MIT bag model parameters for quark and hybrid stars","authors":"Soumen Podder , Suman Pal , Debashree Sen , Gargi Chaudhuri","doi":"10.1016/j.nuclphysa.2023.122796","DOIUrl":"https://doi.org/10.1016/j.nuclphysa.2023.122796","url":null,"abstract":"<div>We compute the equation of state (EoS) of strange quark stars (SQSs) with the MIT Bag model using density dependent bag pressure, characterized by a Gaussian distribution function. The bag pressure's density dependence is controlled by three key parameters namely the asymptotic value (<math><msub><mrow><mi>B</mi></mrow><mrow><mi>a</mi><mi>s</mi></mrow></msub></math>), <math><mi>Δ</mi><mi>B</mi><mo>(</mo><mo>=</mo><msub><mrow><mi>B</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>−</mo><msub><mrow><mi>B</mi></mrow><mrow><mi>a</mi><mi>s</mi></mrow></msub><mo>)</mo></math>, and β. We explore various parameter combinations (<math><msub><mrow><mi>B</mi></mrow><mrow><mi>a</mi><mi>s</mi></mrow></msub></math>, ΔB, β) that adhere to the Bodmer-Witten conjecture, a criterion for the stability of SQSs. Our primary aim is to analyze the effects of these parameter variations on the structural properties of SQSs. However we find that none of the combinations can satisfy the NICER data for PSR J0030+0451 and the constraint on tidal deformability from GW170817. So it can be emphasized that this model cannot describe reasonable SQS configurations. We also extend our work to calculate structural properties of hybrid stars (HSs). With the density dependent bag model (DDBM), these astrophysical constraints are fulfilled by the HSs configurations within a very restricted range of the three parameters. The present work is the first to constrain the parameters of DDBM for both SQS and HSs using the recent astrophysical constraints on tidal deformability from GW170817 and that on mass-radius relationship from NICER data.</div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1042 ","pages":"Article 122796"},"PeriodicalIF":1.4,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138412808","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

Entrance channel dependence of quasi fission in reactions leading to 206Po compound nucleus 导致206Po复合核的准裂变反应的入口通道依赖性

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2023-11-13 DOI: 10.1016/j.nuclphysa.2023.122789

Hajara K. , M.M. Musthafa , N. Madhavan , S. Nath , Jagadish Gehlot , Gonika , C.V. Midhun , Shaima Akbar , Fathima Shirin Shana , A. Parihari , Rohan Biswas , Amninder Kaur

{"title":"Entrance channel dependence of quasi fission in reactions leading to 206Po compound nucleus","authors":"Hajara K. , M.M. Musthafa , N. Madhavan , S. Nath , Jagadish Gehlot , Gonika , C.V. Midhun , Shaima Akbar , Fathima Shirin Shana , A. Parihari , Rohan Biswas , Amninder Kaur","doi":"10.1016/j.nuclphysa.2023.122789","DOIUrl":"10.1016/j.nuclphysa.2023.122789","url":null,"abstract":"<div>The evaporation residue (ER) cross sections for the reaction <math><mmultiscripts><mrow><mi>F</mi></mrow><mprescripts></mprescripts><none></none><mrow><mn>19</mn></mrow></mmultiscripts><msup><mrow><mo>+</mo></mrow><mrow><mn>187</mn></mrow></msup><mi>R</mi><mi>e</mi><msup><mrow><mo>→</mo></mrow><mrow><mn>206</mn></mrow></msup><mi>P</mi><msup><mrow><mi>o</mi></mrow><mrow><mo>⁎</mo></mrow></msup></math> are measured, in the excitation energy range of 86.1 to 118.4 MeV. The measured cross sections are compared with that of 30Si + 176Yb reaction populating the same compound nucleus. Theoretical calculations are performed using the coupled - channels calculations for the capture cross sections and statistical model calculations for the ER cross sections. The dependence of quasi fission on entrance channel parameters such as charge product (Z1Z2), mass asymmetry (α), target deformation (<math><msub><mrow><mi>β</mi></mrow><mrow><mn>2</mn></mrow></msub></math>) and effective fissility (<math><msub><mrow><mi>χ</mi></mrow><mrow><mi>e</mi><mi>f</mi><mi>f</mi></mrow></msub></math>) are studied.</div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1042 ","pages":"Article 122789"},"PeriodicalIF":1.4,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135714512","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

Threshold anomalies in 9Be + 12C 9Be + 12C阈值异常

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2023-11-10 DOI: 10.1016/j.nuclphysa.2023.122793

F. Torabi , E.F. Aguilera , B.V. Carlson

{"title":"Threshold anomalies in 9Be + 12C","authors":"F. Torabi , E.F. Aguilera , B.V. Carlson","doi":"10.1016/j.nuclphysa.2023.122793","DOIUrl":"https://doi.org/10.1016/j.nuclphysa.2023.122793","url":null,"abstract":"<div>The extended optical model is used to simultaneously analyze the elastic scattering and fusion data for the weakly-bound system of 9Be + 12C in the low-energy region. Dynamic polarization potentials <math><msub><mrow><mi>U</mi></mrow><mrow><mi>F</mi></mrow></msub></math>, <math><msub><mrow><mi>U</mi></mrow><mrow><mi>D</mi></mrow></msub></math>, associated with fusion and direct couplings, respectively, are introduced. Corresponding fitting parameters leading to dispersive potentials are found, which provide good simultaneous descriptions of elastic and fusion data. The energy-dependent behavior of the polarization potentials establishes a striking difference with respect to that observed for weakly bound projectiles, including 9Be, on medium- and heavy-mass targets. Contrary to similar analyses made on weakly-bound systems, the real part of <math><msub><mrow><mi>U</mi></mrow><mrow><mi>D</mi></mrow></msub></math> is found to be attractive in the present case. The observed behavior is discussed.</div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1041 ","pages":"Article 122793"},"PeriodicalIF":1.4,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0375947423001963/pdfft?md5=06dde4fc0800f53aede95170fa006c88&pid=1-s2.0-S0375947423001963-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134832580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electromagnetic properties of Λ hypernuclei with a beyond relativistic mean-field approach 超相对论平均场方法下Λ超核的电磁特性

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2023-11-10 DOI: 10.1016/j.nuclphysa.2023.122794

Y.G. Yao , X.Y. Wu , H. Mei

{"title":"Electromagnetic properties of Λ hypernuclei with a beyond relativistic mean-field approach","authors":"Y.G. Yao , X.Y. Wu , H. Mei","doi":"10.1016/j.nuclphysa.2023.122794","DOIUrl":"10.1016/j.nuclphysa.2023.122794","url":null,"abstract":"<div>We present a microscopic study of electromagnetic properties of the low-lying states of single-Λ hypernucleus <math><msubsup><mrow></mrow><mrow><mi>Λ</mi></mrow><mrow><mn>9</mn></mrow></msubsup></math>Be using a quantum-number projected generator coordinate method (HyperGCM) based on covariant density functional theory. All the configurations are restricted to have axial symmetry, with the Λ hyperon in the lowest-energy state. The results are compared to the predictions of a simple particle-rotor model (PRM), for which analytic expressions are available. We show that the electromagnetic properties of <math><msubsup><mrow></mrow><mrow><mi>Λ</mi></mrow><mrow><mn>9</mn></mrow></msubsup></math>Be from the HyperGCM calculation are close to those by the PRM. In particular, it is found that the magnetic moments and M1 transition strengths are less sensitive to the coupling strengths of the ΛN interaction than the electric quadrupole transition strengths. The latter may provide additional constraints on the ΛN interaction.</div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1042 ","pages":"Article 122794"},"PeriodicalIF":1.4,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135614895","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

Quantum entanglement in top quark pair production 顶夸克对产生中的量子纠缠

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2023-11-10 DOI: 10.1016/j.nuclphysa.2023.122795

Mira Varma, Oliver K. Baker

引用次数: 1

Probing the hidden-bottom pentaquark resonances in photonuclear bottomonium production near threshold: Differential observables 探测阈值附近光子核底氢产生中的隐藏底五夸克共振:微分观测值

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2023-11-10 DOI: 10.1016/j.nuclphysa.2023.122792

E.Ya. Paryev

引用次数: 0

Evaporation residue cross-section measurements for 30Si+142Ce system 30Si+142Ce系统蒸发残留物截面测量

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2023-11-10 DOI: 10.1016/j.nuclphysa.2023.122791

Amninderjeet Kaur , A. Kumar , Chetan Sharma , Neha Dhanda , Raghav , N. Madhavan , S. Nath , J. Gehlot , Gonika , Chandra Kumar , P. Sherpa , A. Parihari , Jyoti Pandey , A.K. Gupta , H.P. Sharma , B.R. Behera

{"title":"Evaporation residue cross-section measurements for 30Si+142Ce system","authors":"Amninderjeet Kaur , A. Kumar , Chetan Sharma , Neha Dhanda , Raghav , N. Madhavan , S. Nath , J. Gehlot , Gonika , Chandra Kumar , P. Sherpa , A. Parihari , Jyoti Pandey , A.K. Gupta , H.P. Sharma , B.R. Behera","doi":"10.1016/j.nuclphysa.2023.122791","DOIUrl":"10.1016/j.nuclphysa.2023.122791","url":null,"abstract":"<div>Evaporation residue (ER) cross-sections were measured for 30Si+142Ce reaction at laboratory energies in the range of 105 - 132 MeV using the HYbrid Recoil mass Analyzer (HYRA) at IUAC, New Delhi. The transmission efficiency of the HYRA was estimated using the calibration reaction 28Si+142Ce. Sub-barrier fusion enhancement was observed when compared with the one-dimensional barrier penetration model predictions for the present system. To explore the phenomena responsible for sub-barrier fusion enhancement, coupled-channels calculations were performed using the CCFULL code. The effect of couplings and the role of positive Q-value neutron transfer (PQNT) channels on sub-barrier fusion cross-sections were investigated. Coupled-channels calculations were able to reproduce the data by including the coupling in both projectile and target nucleus along with two neutron-transfer channels having positive Q-value. The measured ER cross-sections were compared with the nearby systems to explore the role of deformation of the colliding nuclei.</div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1042 ","pages":"Article 122791"},"PeriodicalIF":1.4,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135614488","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

Impact of nuclear rotation corrections on alpha decay half-lives of superheavy nuclei within 98 ≤ Z ≤ 120 98内核旋转修正对超重核α衰变半衰期的影响 ≤ Z ≤ 120

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2023-11-08 DOI: 10.1016/j.nuclphysa.2023.122784

Theeb Y.T. Alsultan , Joshua T. Majekodunmi , Raj Kumar , Boon Tong Goh , M. Bhuyan

{"title":"Impact of nuclear rotation corrections on alpha decay half-lives of superheavy nuclei within 98 ≤ Z ≤ 120","authors":"Theeb Y.T. Alsultan , Joshua T. Majekodunmi , Raj Kumar , Boon Tong Goh , M. Bhuyan","doi":"10.1016/j.nuclphysa.2023.122784","DOIUrl":"https://doi.org/10.1016/j.nuclphysa.2023.122784","url":null,"abstract":"<div>The influence of nuclear rotation on the decay half-lives of superheavy nuclei within the range <math><mn>98</mn><mo>≤</mo><mi>Z</mi><mo>≤</mo><mn>120</mn></math> is investigated using the axially deformed relativistic Hartree-Bogoliubov theory in the continuum (DRHBc) with the PC-PK1 parameter set. The deduced DRHBc decay energies (with and without the rotation effect) are compared with those calculated from the macroscopic-microscopic WS4 and the available experimental binding energies. Six semi-empirical formulae, such as the Viola-Seaborg formula (VSS), the modified Brown formula (mB1), the semi-empirical relationship based on fission theory (SemFIS2), the Royer formula (R), the Wang formula (Wang) and the modified YQZR formula (MYQZR) are employed to estimate the half-lives of α decay. Among these formulae, the half-live predictions of SemFIS2 are found to gradually deviate from the systematic trend beyond <math><msub><mrow><mi>N</mi></mrow><mrow><mi>d</mi></mrow></msub><mo>=</mo><mn>184</mn></math>, showing that the probability of undergoing spontaneous fission is less feasible beyond this point. A minimum is observed at <math><msub><mrow><mi>N</mi></mrow><mrow><mi>d</mi></mrow></msub><mo>=</mo><mn>184</mn></math>, reflecting its neutron shell closure for the mass region considered on the nuclear chart. The results further indicate that, for <math><mn>98</mn><mo>≤</mo><mi>Z</mi><mo>≤</mo><mn>104</mn></math>, the predictions of all semi-empirical formulae are more closely matched to the available experimental data when the rotation effect is taken into account. However, we have demonstrated that the effect of nuclear rotation gradually reduces as the atomic nucleus becomes heavier.</div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1041 ","pages":"Article 122784"},"PeriodicalIF":1.4,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0375947423001872/pdfft?md5=cc80d1c6be7caab7202209420d24876f&pid=1-s2.0-S0375947423001872-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134655743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of fast neutron reactions in natural lutetium 天然镥中快中子反应的研究

IF 1.4 4区物理与天体物理

Nuclear Physics A Pub Date : 2023-11-07 DOI: 10.1016/j.nuclphysa.2023.122788

A.M. Savrasov , O.M. Gorbachenko , V.M. Morozyuk , I.M. Kadenko , V.A. Zheltonozhsky

{"title":"Investigation of fast neutron reactions in natural lutetium","authors":"A.M. Savrasov , O.M. Gorbachenko , V.M. Morozyuk , I.M. Kadenko , V.A. Zheltonozhsky","doi":"10.1016/j.nuclphysa.2023.122788","DOIUrl":"https://doi.org/10.1016/j.nuclphysa.2023.122788","url":null,"abstract":"<div>The cross-sections and isomeric ratios of the cross-sections for the reaction 176Lu(n,γ)<math><msup><mrow></mrow><mrow><mn>177</mn><mi>m</mi><mo>,</mo><mi>g</mi></mrow></msup></math>Lu were obtained for the first time on a base of experimental and evaluated data with the MCNP simulation of scattered neutron spectra. The cross-sections of the reactions 175Lu(n,p)175Yb, 175Lu(n,α)172Tm, and 176Lu(n,α)173Tm were precised at a neutron energy of 14.6±0.3 MeV and used for checking up our cross section determination procedure. The account of scattered neutrons to the nuclear reaction was estimated with the MCNP 4c code and TALYS-1.96, EMPIRE 3.2.3 codes calculations. Even with a proper consideration of scattered neutrom spectra, the 176Lu(n,γ)<math><msup><mrow></mrow><mrow><mn>177</mn><mi>m</mi><mo>,</mo><mi>g</mi></mrow></msup></math>Lu reaction cross section appeared rather greater than the calculations with the TALYS, EMPIRE codes and evaluations within the ENDF/B-VIII.0, TENLD-2021, JEFF-3 data bases and libraries.</div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1041 ","pages":"Article 122788"},"PeriodicalIF":1.4,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0375947423001914/pdfft?md5=8e47e4e4af9a2eee578a1901a305b382&pid=1-s2.0-S0375947423001914-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134655744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0