Nuclear Physics A最新文献_第4页

Sub-barrier fusion dynamics in the reaction 16O+138Ba: Cross sections and barrier distribution studies 16O+138Ba反应的亚势垒融合动力学：截面和势垒分布研究

IF 2.5 4区物理与天体物理

Nuclear Physics A Pub Date : 2026-03-01 Epub Date: 2025-12-28 DOI: 10.1016/j.nuclphysa.2025.123322

K. Prameela , S. Ramakrishna Reddy , Anjali Merin , K.V. Varsha , K.V. Jinu , Gonika , Alankar Singh , Rishabh Kumar , J. Gehlot , S. Nath , E. Prasad , A.M. Vinodkumar , P.V. Madhusudhana Rao , S. Appannababu

{"title":"Sub-barrier fusion dynamics in the reaction 16O+138Ba: Cross sections and barrier distribution studies","authors":"K. Prameela , S. Ramakrishna Reddy , Anjali Merin , K.V. Varsha , K.V. Jinu , Gonika , Alankar Singh , Rishabh Kumar , J. Gehlot , S. Nath , E. Prasad , A.M. Vinodkumar , P.V. Madhusudhana Rao , S. Appannababu","doi":"10.1016/j.nuclphysa.2025.123322","DOIUrl":"10.1016/j.nuclphysa.2025.123322","url":null,"abstract":"<div><div>Fusion excitation function has been measured for the reaction <sup>16</sup>O+<sup>138</sup>Ba around the Coulomb barrier energies using the recoil mass separator Heavy Ion Reaction Analyzer (HIRA). The fusion cross sections are strongly enhanced when compared to the predictions of the one dimensional barrier penetration model (1D-BPM) in the below barrier region. Fusion barrier distribution has been extracted from the experimental data to unveil the various channel couplings involved in the reaction. The measured fusion cross sections data and extracted barrier distribution have been analyzed with the coupled-channels (CC) calculations. These calculations indicate that the fusion excitation function has been reproduced quite well with the inclusion of one- and two-phonon vibrational states of the target nucleus. Whereas, one-phonon state alone was sufficient to reproduce the barrier distribution indicating that, coupling to the two-phonon state had no significant effect on the shape of the barrier distribution.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1067 ","pages":"Article 123322"},"PeriodicalIF":2.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145924724","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}

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Elastic scattering of α-particles from nα-cluster nuclei using the high-energy approximation and São Paulo potential 基于高能近似和<s:1>圣保罗势的nα团簇核α-粒子弹性散射

IF 2.5 4区物理与天体物理

Nuclear Physics A Pub Date : 2026-03-01 Epub Date: 2025-12-04 DOI: 10.1016/j.nuclphysa.2025.123306

Awad A Ibraheem , M.N. El-Hammamy , F. Algahatani , Rehab Yajzey , Sh. Hamada , A. Attia

引用次数: 0

Study of heavy-ion induced fission in actinide nuclei through fragment-neutron correlation measurements 通过碎片-中子相关测量研究锕系原子核中的重离子诱导裂变

IF 2.5 4区物理与天体物理

Nuclear Physics A Pub Date : 2026-03-01 Epub Date: 2025-11-29 DOI: 10.1016/j.nuclphysa.2025.123302

N. Saneesh , A. Jhingan , K.S. Golda , Mohit Kumar , A.M. Vinodkumar , P. Sugathan

{"title":"Study of heavy-ion induced fission in actinide nuclei through fragment-neutron correlation measurements","authors":"N. Saneesh , A. Jhingan , K.S. Golda , Mohit Kumar , A.M. Vinodkumar , P. Sugathan","doi":"10.1016/j.nuclphysa.2025.123302","DOIUrl":"10.1016/j.nuclphysa.2025.123302","url":null,"abstract":"<div><div>The fission fragment mass distribution and neutron multiplicity from the fission of <sup>227</sup>Pa, produced through the complete fusion reaction <sup>19</sup>F + <sup>208</sup>Pb, were measured to study the influence of neutron emission on fission dynamics. The measurements were carried out in the excitation energy range of  ≈  30 - 60 MeV. The experimental data were analyzed within the framework of the semi-empirical GEF model to understand the evolution of mass distributions at different excitation energies and their dependence on particle emission. The calculations, which incorporate multi-chance fission, suggest that the observed enhancement in mass width at lower excitation energies (<em>E</em>* ≈ 32 MeV) arises from fragments shell effects, restored due to the sequential nature of fission. In contrast, no significant influence of microscopic effects is observed at higher excitation energies (<em>E</em>* ≈ 60 MeV). To further elucidate and compare the role of shell effects, GEF model calculations were also performed for a heavier actinide <sup>250</sup>Cf in a similar energy range. These results indicate that the interplay between symmetric and asymmetric fission modes leads to the characteristic flat-top mass distribution seen in heavier actinides, unlike the shoulder-like structures observed in lighter actinides.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1067 ","pages":"Article 123302"},"PeriodicalIF":2.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682167","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

Nuclear structure of medium and heavy mass nuclei: From collectivity trends to machine learning approaches 中质量和重质量核的核结构：从集体趋势到机器学习方法

IF 2.5 4区物理与天体物理

Nuclear Physics A Pub Date : 2026-03-01 Epub Date: 2025-11-20 DOI: 10.1016/j.nuclphysa.2025.123288

Mudasir Ahmad, Amit Bindra

{"title":"Nuclear structure of medium and heavy mass nuclei: From collectivity trends to machine learning approaches","authors":"Mudasir Ahmad, Amit Bindra","doi":"10.1016/j.nuclphysa.2025.123288","DOIUrl":"10.1016/j.nuclphysa.2025.123288","url":null,"abstract":"<div><div>Quantum shape-phase transitions in medium and heavy mass nuclei remain key benchmarks for testing nuclear models. Building on recent machine learning (ML) studies [1–3], we introduce a hybrid framework that integrates empirical systematics, Interacting Boson Approximation (IBA-1), and Light Gradient Boosting Machine (LightGBM) predictions. A composite sensitivity parameter, <em>S</em> = ▾R<sub>4/2</sub> × <em>B</em>(E2; 0⁺ → 2⁺) is proposed, coupling deformation dynamics with quadrupole collectivity. Applied to rare-earth nuclei (<em>Z</em> = 58–68, <em>N</em> = 84–102) <em>Ȿ</em> exhibits a sharp peak near N ∼ 90, providing a distinct indicator of the U(5)–SU(3) phase transition. LightGBM reproduces excitation energies and B(E2) values with high accuracy across 47 isotopes, while extrapolations identify <sup>154</sup>Gd and <sup>156</sup>Dy as critical-point candidates and highlight <sup>156</sup>Nd, <sup>150</sup>Gd and <sup>152,168</sup>Dy as priority cases for measurement. The reliability of our approach is underscored by SHAP (Shapley additive explanation) analysis, which highlights the dominant role of the Casten factor and neutron number, thereby reinforcing the physical interpretability of the model. These findings establish <em>Ȿ</em> as a sensitive probe of shape evolution and demonstrate the promise of physics-guided ML–theory frameworks for informing future spectroscopic studies. Our methodology is inherently scalable and can be systematically extended across the nuclear chart to explore shape coexistence and shell evolution, offering a robust pathway for future ML–IBA studies in diverse structural regimes.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1067 ","pages":"Article 123288"},"PeriodicalIF":2.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145617195","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

Dynamics of 6,7 Li breakups on heavy target mass 重目标质量上6,7 Li分裂的动力学

IF 2.5 4区物理与天体物理

Nuclear Physics A Pub Date : 2026-03-01 Epub Date: 2025-12-24 DOI: 10.1016/j.nuclphysa.2025.123317

L.V. Ndala , M.L. Lekala

引用次数: 0

Cross sections for 184,186Re radioisotopes for medical applications: A proton-induced approach 医用184,186Re放射性同位素的截面：质子诱导方法

IF 2.5 4区物理与天体物理

Nuclear Physics A Pub Date : 2026-03-01 Epub Date: 2025-11-18 DOI: 10.1016/j.nuclphysa.2025.123284

S. Hinge, P. Singh, K. Churi, M. Hemalatha

{"title":"Cross sections for 184,186Re radioisotopes for medical applications: A proton-induced approach","authors":"S. Hinge, P. Singh, K. Churi, M. Hemalatha","doi":"10.1016/j.nuclphysa.2025.123284","DOIUrl":"10.1016/j.nuclphysa.2025.123284","url":null,"abstract":"<div><div>The study presents calculated cross sections for proton-induced reactions on <sup>180,182,183,184,186</sup>W isotopes for the production of <sup>180,182,183,184,186</sup>Re using the TALYS-2.0 nuclear reaction code. The optical model potentials were calculated using Koning-Delaroche (KD) model for protons scattering from <sup>180,182,183,184,186</sup>W isotopes. Using the potentials, the calculated differential elastic scattering and total reaction cross sections were compared with corresponding data where available and were found to be in good agreement. Further, the calculated (p,n) reaction cross sections were calculated using nuclear level densities from both the back-shifted Fermi gas model (BFM) and the microscopic Hartree-Fock-Bogoliubov (HFB) approaches. The calculated (p,n) reaction cross sections compare well with data and TENDL-2023 for <sup>186</sup>Re for which data are available, while for the isotopes, <sup>180,182,183</sup>Re, predictions have been made. In addition, production yields have been calculated for the medically relevant radionuclides, <sup>184,186</sup>Re.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1067 ","pages":"Article 123284"},"PeriodicalIF":2.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145594482","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

Insights into triaxial collectivity of odd-mass 111−119Sb isotopes 对奇质量111−119Sb同位素三轴集体的认识

IF 2.5 4区物理与天体物理

Nuclear Physics A Pub Date : 2026-03-01 Epub Date: 2025-12-01 DOI: 10.1016/j.nuclphysa.2025.123299

Aneeqa Basheer , Ritvik Gupta , Manvi Rajput , Suram Singh , G.H. Bhat , Pankaj Kumar , Arun Bharti , J.A. Sheikh

{"title":"Insights into triaxial collectivity of odd-mass 111−119Sb isotopes","authors":"Aneeqa Basheer , Ritvik Gupta , Manvi Rajput , Suram Singh , G.H. Bhat , Pankaj Kumar , Arun Bharti , J.A. Sheikh","doi":"10.1016/j.nuclphysa.2025.123299","DOIUrl":"10.1016/j.nuclphysa.2025.123299","url":null,"abstract":"<div><div>High-spin structures of odd-mass <span><math><msup><mrow></mrow><mrow><mn>111</mn><mo>−</mo><mn>119</mn></mrow></msup></math></span>Sb isotopes are investigated using the Triaxial Projected Shell Model (TPSM), with deformation parameters extracted from constrained Covariant Density Functional Theory (CDFT) calculations. The band diagrams exhibit characteristic crossings between one- and three-quasiparticle (1-qp and 3-qp) configurations in the mid-spin region, which are explained through the evolution of 3-qp wavefunction amplitudes. These structural changes are reflected in alignment diagrams, signature splitting and transition probabilities. The study demonstrates the necessity of including multi-quasiparticle configurations in the model basis to accurately reproduce experimentally observed electromagnetic transition rates particularly in <sup>113</sup>Sb. Angular momentum projections, evaluated across three intrinsic sectors, provide direct evidence for triaxiality in this isotope. Overall, this work offers new insights into the influence of triaxial deformation and quasiparticle dynamics on the rotational behavior of Sb nuclei near the Z = 50 shell closure.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1067 ","pages":"Article 123299"},"PeriodicalIF":2.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145733859","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

Cross-section measurement of 181Ta(n,γ)182Ta with covariance analysis 181Ta(n,γ)182Ta的横截面测量与协方差分析

IF 2.5 4区物理与天体物理

Nuclear Physics A Pub Date : 2026-03-01 Epub Date: 2025-12-16 DOI: 10.1016/j.nuclphysa.2025.123312

Mahima Upadhyay , Punit Dubey , Mahesh Choudhary , Namrata Singh , Shweta Singh , Sriya Paul , G. Mishra , G. Mohanto , Sukanya De , L.S. Danu , B. Lalremruata , Yu N. Kopatch , I.N. Ruskov , Ajay Kumar , R.G. Thomas , A. Kumar

{"title":"Cross-section measurement of 181Ta(n,γ)182Ta with covariance analysis","authors":"Mahima Upadhyay , Punit Dubey , Mahesh Choudhary , Namrata Singh , Shweta Singh , Sriya Paul , G. Mishra , G. Mohanto , Sukanya De , L.S. Danu , B. Lalremruata , Yu N. Kopatch , I.N. Ruskov , Ajay Kumar , R.G. Thomas , A. Kumar","doi":"10.1016/j.nuclphysa.2025.123312","DOIUrl":"10.1016/j.nuclphysa.2025.123312","url":null,"abstract":"<div><div>The current study presents the cross-section measurement of <sup>181</sup>Ta(n,<em>γ</em>)<sup>182</sup>Ta reaction at 1.37  ±  0.13, 2.06  ±  0.14, 2.56  ±  0.15, and 3.05  ±  0.17 MeV neutron energies utilizing offline <em>γ</em>-ray spectroscopy. The neutrons were generated through the <sup>7</sup>Li(p,n)<sup>7</sup>Be reaction. The <sup>115</sup>In(n,n’<em>γ</em>)<sup>115<em>m</em></sup>In reaction served as a monitor reaction. The present study provides detailed information on the propagation of uncertainty in the overall result. The required corrections for low energy background neutron and <em>γ</em>-ray coincidence summing effect have been made in the present measurement. The output is compared with the pre-existing cross-section data from the EXFOR database, evaluated data libraries and theoretical model predictions like level density models and <em>γ</em>-ray strength functions.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1067 ","pages":"Article 123312"},"PeriodicalIF":2.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145840062","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

Configurations of high-K band structures in Hf isotopes Hf同位素中高k波段结构的构型

IF 2.5 4区物理与天体物理

Nuclear Physics A Pub Date : 2026-03-01 Epub Date: 2025-11-30 DOI: 10.1016/j.nuclphysa.2025.123301

Sachin Kumar Singh , S.K. Tandel , Saket Suman , Harsh Kumar , M. Hemalatha , S. Hinge , P. Singh , S. Mestri , Madhu , Dhananjaya Sahoo , A.Y. Deo , P.K. Nayak , S. Mukhopadhyay , G. Mukherjee , S. Bhattacharyya , T. Bhattacharjee , S. Chakraborty , Soumik Bhattacharya , S.S. Nayak , S. Panwar , S.S. Ghugre

{"title":"Configurations of high-K band structures in Hf isotopes","authors":"Sachin Kumar Singh , S.K. Tandel , Saket Suman , Harsh Kumar , M. Hemalatha , S. Hinge , P. Singh , S. Mestri , Madhu , Dhananjaya Sahoo , A.Y. Deo , P.K. Nayak , S. Mukhopadhyay , G. Mukherjee , S. Bhattacharyya , T. Bhattacharjee , S. Chakraborty , Soumik Bhattacharya , S.S. Nayak , S. Panwar , S.S. Ghugre","doi":"10.1016/j.nuclphysa.2025.123301","DOIUrl":"10.1016/j.nuclphysa.2025.123301","url":null,"abstract":"<div><div>The structure of several Hf isotopes has been studied through their population in <em>α</em>-induced reactions using the INGA detector array. The <em>K</em><sup><em>π</em></sup> = 6<span><math><msup><mrow></mrow><mo>+</mo></msup></math></span> band and the 0<span><math><msubsup><mrow></mrow><mrow><mn>2</mn></mrow><mo>+</mo></msubsup></math></span>, 2<span><math><msubsup><mrow></mrow><mrow><mn>2</mn></mrow><mo>+</mo></msubsup></math></span> quadrupole and the 2<span><math><msup><mrow></mrow><mo>−</mo></msup></math></span> octupole vibrational structures in <sup>176</sup>Hf have been extended with the inclusion of 13 new transitions. Half-lives of high-<em>K</em> states in various Hf isotopes have been measured. The branching ratios of <em>γ</em> rays in the rotational bands built on the <em>K</em> isomers have been determined and these have been used to infer their underlying nucleonic configurations. Calculations using the Ultimate Cranker code attest to the rigid, well-deformed prolate shapes of Hf isotopes and the resultant <em>K</em> symmetry.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1067 ","pages":"Article 123301"},"PeriodicalIF":2.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145682169","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

Effect of collective enhancement of level density in the neutron emission from compound nuclei 复合核中子发射中能级密度的集体增强效应

IF 2.5 4区物理与天体物理

Nuclear Physics A Pub Date : 2026-03-01 Epub Date: 2025-11-27 DOI: 10.1016/j.nuclphysa.2025.123289

B. Sidharth, M. Shareef

引用次数: 0