Nuclear Physics A最新文献

{"title":"Hydrodynamical model for high-energy dipole vibrations in nuclei far from the beta-stability line","authors":"V.Yu. Denisov","doi":"10.1016/j.nuclphysa.2025.123213","DOIUrl":"10.1016/j.nuclphysa.2025.123213","url":null,"abstract":"<div><div>The model for describing the isoscalar and isovector dipole giant resonance energies in nuclei with a neutron (or proton) halo or skin is presented. The realistic density distribution of the halo/skin, exponentially decaying with increasing radius, is taken into account. The proton and neutron density oscillations in the core part of the nucleus are described by the hydrodynamic equations of continuity and Euler. The proton and neutron density oscillations in the core part of the nucleus are coupled to both the proton and neutron core radii vibrations as well as the density fluctuation inside the neutron (or proton) halo/skin using the boundary conditions on the free surface. The pressure of the neutron (proton) matter related to the density oscillation in the halo/skin is evaluated using the Skyrme energy-density functional. Simple formulas are obtained for calculating the energies of dipole vibrations in nuclei with the halo/skin. It is found that the excitation energies of the isoscalar dipole resonances in the nuclei with halo/skin are smaller than those in the nuclei without halo/skin. The excitation energies of the isovector dipole resonances are weakly dependent on the halo/skin characteristics. The influence on the excitation energies of the dipole resonances of the halo/skin properties is discussed. The transition densities of the resonances are considered.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123213"},"PeriodicalIF":2.5,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771997","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}

{"title":"Hyperfine mass splittings in ground and radially excited states of heavy-flavored QQQ¯Q¯ tetraquarks: PGM defect and fractional order effects","authors":"D. Nga Ongodo ,&nbsp;A.A. Atangana Likéné ,&nbsp;J.M. Ema'a Ema'a ,&nbsp;P. Ele Abiama ,&nbsp;G.H. Ben-Bolie","doi":"10.1016/j.nuclphysa.2025.123215","DOIUrl":"10.1016/j.nuclphysa.2025.123215","url":null,"abstract":"&lt;div&gt;&lt;div&gt;In this study, we investigate the masses and fall-apart decays of the radial excitations in &lt;span&gt;&lt;math&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mrow&gt;&lt;/mover&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mi&gt;c&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mrow&gt;&lt;/mover&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;mi&gt;b&lt;/mi&gt;&lt;mi&gt;b&lt;/mi&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mi&gt;b&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mrow&gt;&lt;/mover&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mi&gt;b&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mrow&gt;&lt;/mover&gt;&lt;/math&gt;&lt;/span&gt; tetraquarks using a framework that incorporates topological defects and fractional-order derivatives via the generalized conformable fractional formalism. The interaction potential combines the Cornell potential with harmonic oscillator and inversely quadratic terms, adapted for diquark configurations. The Hamiltonian includes spin-independent and spin-dependent components, with the latter breaking degeneracies between spin singlets and triplets. The Schrödinger equation is solved analytically using the generalized fractional Nikiforov-Uvarov method. Our analysis focuses on axial-vector diquarks in the ground (&lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;) and first radially excited states (&lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;), ensuring compliance with symmetry principles. The computed diquark and tetraquark masses, for states with &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;J&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;P&lt;/mi&gt;&lt;mi&gt;C&lt;/mi&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;, &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;mo&gt;+&lt;/mo&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;, align well with existing results, with deviations within reasonable ranges. Incremental differences observed in our models with varying &lt;em&gt;δ&lt;/em&gt; values highlight the influence and adaptability of the fractional parameter, providing insights into the modeling approach. Heavy tetraquark states should be broad and difficult to detect experimentally. However, for some first radially excited states, we have calculated masses below their corresponding two-meson thresholds, indicating stability against fall-apart decays, while others with masses above these thresholds are likely to decay rapidly. The enhanced stability of lower-mass states increases their chances of experimental observation, as ongoing accelerator experiments search for exotic hadrons. Additionally, it is found that the &lt;span&gt;&lt;math&gt;&lt;mi&gt;X&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;6400&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;mi&gt;X&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;6600&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; structures observed by ATLAS in the di-&lt;span&gt;&lt;math&gt;&lt;mi&gt;J&lt;/mi&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;mi&gt;ψ&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; invariant mass spectrum can be attributed to the &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;m","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123215"},"PeriodicalIF":2.5,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144749846","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}

{"title":"The IBM description of the b(E2) anomaly: Dynamical triaxiality and configuration mixing","authors":"Wei Teng,&nbsp;Sheng Nan Wang,&nbsp;Xian Zhi Zhao,&nbsp;Yu Zhang","doi":"10.1016/j.nuclphysa.2025.123214","DOIUrl":"10.1016/j.nuclphysa.2025.123214","url":null,"abstract":"<div><div>A theoretical investigation has been carried out to examine the effects of dynamical triaxility and configuration mixing on the <span><math><mi>B</mi><mo>(</mo><mi>E</mi><mn>2</mn><mo>)</mo></math></span> anomaly, characterized by <span><math><msub><mrow><mi>B</mi></mrow><mrow><mn>4</mn><mo>/</mo><mn>2</mn></mrow></msub><mo>=</mo><mi>B</mi><mo>(</mo><mi>E</mi><mn>2</mn><mo>;</mo><msubsup><mrow><mn>4</mn></mrow><mrow><mn>1</mn></mrow><mrow><mo>+</mo></mrow></msubsup><mo>→</mo><msubsup><mrow><mn>2</mn></mrow><mrow><mn>1</mn></mrow><mrow><mo>+</mo></mrow></msubsup><mo>)</mo><mo>/</mo><mi>B</mi><mo>(</mo><mi>E</mi><mn>2</mn><mo>;</mo><msubsup><mrow><mn>2</mn></mrow><mrow><mn>1</mn></mrow><mrow><mo>+</mo></mrow></msubsup><mo>→</mo><msubsup><mrow><mn>0</mn></mrow><mrow><mn>1</mn></mrow><mrow><mo>+</mo></mrow></msubsup><mo>)</mo><mo>&lt;</mo><mn>1.0</mn></math></span> and <span><math><msub><mrow><mi>R</mi></mrow><mrow><mn>4</mn><mo>/</mo><mn>2</mn></mrow></msub><mo>=</mo><mi>E</mi><mo>(</mo><msubsup><mrow><mn>4</mn></mrow><mrow><mn>1</mn></mrow><mrow><mo>+</mo></mrow></msubsup><mo>)</mo><mo>/</mo><mi>E</mi><mo>(</mo><msubsup><mrow><mn>2</mn></mrow><mrow><mn>1</mn></mrow><mrow><mo>+</mo></mrow></msubsup><mo>)</mo><mo>≥</mo><mn>2.0</mn></math></span>, within the framework of the interacting boson model (IBM). The results indicate that the effective <em>γ</em> deformation may undergo substantial changes with increasing angular momentum in the <span><math><mi>B</mi><mo>(</mo><mi>E</mi><mn>2</mn><mo>)</mo></math></span> anomaly system governed by an IBM Hamiltonian involving rotor-like terms. Further calculations reveal that mixing between normal and intruder states may facilitate the emergence of <span><math><mi>B</mi><mo>(</mo><mi>E</mi><mn>2</mn><mo>)</mo></math></span> anomaly, thereby providing additional theoretical insights into this unusual phenomenon.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123214"},"PeriodicalIF":2.5,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144750343","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}

{"title":"Understanding X-ray bursts via direct measurements of (α,p) reactions","authors":"M.L. Avila ,&nbsp;K. Auranen ,&nbsp;A.D. Ayangeakaa ,&nbsp;K. Bhatt ,&nbsp;J. Chen ,&nbsp;C. Fougères ,&nbsp;C.R. Hoffman ,&nbsp;H. Jayatissa ,&nbsp;C.L. Jiang ,&nbsp;B.P. Kay ,&nbsp;E. Lopez-Saavedra ,&nbsp;D. Neto ,&nbsp;W.J. Ong ,&nbsp;K.E. Rehm ,&nbsp;D. Santiago-Gonzalez ,&nbsp;C. Ugalde ,&nbsp;J. Wu","doi":"10.1016/j.nuclphysa.2025.123212","DOIUrl":"10.1016/j.nuclphysa.2025.123212","url":null,"abstract":"<div><div>X-ray bursts, which are thermonuclear explosions on neutron stars accreting mass from companion stars, are the most frequent stellar explosions. To understand the mechanisms behind these bursts, astrophysical models need to incorporate the reaction rates of key nuclear reactions occurring in these stellar environments. This, however, presents significant challenges due to the typically small cross sections of these reactions and the experimental complexities associated with the use of low-intensity radioactive beams. Consequently, most of these reaction rates remain unknown. However, recent advancements in radioactive ion beam facilities and experimental techniques have opened new opportunities to measure these crucial astrophysical reactions. This work explores these advances and highlights recent measurements relevant to X-ray bursts.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123212"},"PeriodicalIF":2.5,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144749848","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}

{"title":"Nuclear level scheme of 182Ta nucleus via thermal neutron capture reaction and γ − γ coincidence measurement","authors":"Nguyen Hoang Phuc ,&nbsp;Phan Bao Quoc Hieu ,&nbsp;Nguyen Xuan Hai ,&nbsp;Ho Huu Thang ,&nbsp;Truong Van Minh ,&nbsp;Le Tan Phuc ,&nbsp;Nguyen Quang Hung ,&nbsp;Nguyen Ngoc Anh","doi":"10.1016/j.nuclphysa.2025.123210","DOIUrl":"10.1016/j.nuclphysa.2025.123210","url":null,"abstract":"<div><div>Two-step gamma cascades from the ¹⁸²Ta compound state, produced via thermal neutron capture of ¹⁸¹Ta target, were measured using a <em>γ</em>-<em>γ</em> coincidence spectrometer. A partial nuclear level scheme (NLS), comprising of 67 primary transitions and associated intermediate levels together with 157 secondary transitions, has been constructed from the measured data. Comparison between the currently adopted NLS and that extracted from the Evaluated Nuclear Structure Datafile (ENSDF) library indicates that 32 primary, 52 intermediate levels, and 11 secondary transitions are mostly the same. The remaining 35 primary, 15 intermediate levels, and 146 secondary transitions are thus new data observed in the present work. Additionally, the spin value of the detected levels are found in excellent agreement with those in the ENSDF library. In particular, a unique spin value has been assigned to 25 detected levels whereas the spin value of 15 existing levels has been refined. All the discrepancies between data from this work and those from the ENSDF library have been well explained. Data newly observed in this work should be, therefore, recommended to update the currently adopted NLS of ¹⁸²Ta in the ENSDF library.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123210"},"PeriodicalIF":2.5,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144749847","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}

{"title":"Microscopic description of the shape evolution in Ru isotopes","authors":"Y. El Bassem ,&nbsp;M. El Adri ,&nbsp;A. El Batoul ,&nbsp;M. Oulne","doi":"10.1016/j.nuclphysa.2025.123209","DOIUrl":"10.1016/j.nuclphysa.2025.123209","url":null,"abstract":"<div><div>The shape evolution in even-even ⁹²⁻¹³⁰Ru isotopes is investigated within the framework of covariant density functional theory (CDFT), using the DD-ME2 and DD-PC1 parametrizations. Axial and triaxial potential energy surface (PES) calculations are employed to examine the evolution of ground-state shapes and the occurrence of shape transitions and coexistence phenomena across the isotopic chain. Additionally, various ground-state properties, including binding energies, two-neutron separation energies, charge radii, and two-neutron shell gaps, are systematically studied. The results reveal a gradual development of nuclear deformation with increasing neutron number, and demonstrate robust agreement with available experimental data.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123209"},"PeriodicalIF":2.5,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722045","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}

{"title":"Study of mass spectra and Regge trajectories of Bc mesons with instanton induced potential in NRQM","authors":"Vipin Naik N.S. ,&nbsp;Antony Prakash Monteiro ,&nbsp;Praveen P. D'Souza ,&nbsp;K.B. Vijaya Kumar","doi":"10.1016/j.nuclphysa.2025.123208","DOIUrl":"10.1016/j.nuclphysa.2025.123208","url":null,"abstract":"<div><div>The mass spectrum of <span><math><msub><mrow><mi>B</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> meson states is obtained using a phenomenological non-relativistic quark model (NRQM). The framework of the non relativistic quark model consists of a Coulomb like potential from the perturbative one gluon exchange and the linear confining potential along with the potential derived from instanton vacuum. An overall agreement is obtained with the experimental masses and results are justified by the evaluation of the regge trajectories plotted in the (<em>J</em>,<span><math><msup><mrow><mi>M</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span>) and (<span><math><msub><mrow><mi>n</mi></mrow><mrow><mi>r</mi></mrow></msub></math></span>,<span><math><msup><mrow><mi>M</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span>) planes.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123208"},"PeriodicalIF":2.5,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722046","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}

{"title":"Photonuclear reactions on mercury isotopes","authors":"O.V. Poriadina ,&nbsp;S.S. Belyshev ,&nbsp;N.Yu. Fursova ,&nbsp;V.V. Khankin ,&nbsp;A.A. Kuznetsov","doi":"10.1016/j.nuclphysa.2025.123206","DOIUrl":"10.1016/j.nuclphysa.2025.123206","url":null,"abstract":"<div><div>Using the activation method with a bremsstrahlung beam with a maximum energy of 55 MeV, cross sections per equivalent photon and yields of photonuclear reactions on a natural mixture of mercury isotopes were measured. A comparison is presented between the experimentally obtained absolute yields and cross sections per equivalent photon and the results calculated using the combined photonucleon reaction model and the TALYS model. Good agreement for photoproton reactions is achieved when isospin splitting, along with the contributions of the GDR2 overtone, the quadrupole resonance (QR) and the quasi-deuteron mechanism (QD) to the photoabsorption cross section, are taken into account. Additionally, the isomeric ratios IR for <span><math><msup><mrow></mrow><mrow><mn>195</mn><mi>m</mi><mo>,</mo><mi>g</mi></mrow></msup></math></span>Hg and <span><math><msup><mrow></mrow><mrow><mn>197</mn><mi>m</mi><mo>,</mo><mi>g</mi></mrow></msup></math></span>Hg were investigated in the present work.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123206"},"PeriodicalIF":2.5,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722044","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}

{"title":"Alpha-particles induced nuclear reactions on zinc: Experimental and theoretical evaluation","authors":"A. Elbinawi ,&nbsp;B.M. Ali ,&nbsp;F. Ditrói ,&nbsp;M. Al-Abyad","doi":"10.1016/j.nuclphysa.2025.123211","DOIUrl":"10.1016/j.nuclphysa.2025.123211","url":null,"abstract":"<div><div>Cross-sections of the nuclear reactions ^natZn(α,x)^67,68&amp;69Ge and ^{66,67,68&amp;70}Ga were measured from their respective threshold energy up to 20 MeV. The stacked-foil activation technique was used to generate the excitation functions of these reactions utilizing natural titanium for monitoring the irradiation beam, and HpGe detectors for the residual activity measurements. The present results along with the literature experimental data were analyzed to produce recommended excitation functions for the reactions ^NatZn(α,x)^67,68Ge, ^NatZn(α,x)⁶⁶Ga, ⁶⁴Zn(α,pn)⁶⁶Ga, ⁶⁴Zn(α,p)⁶⁷Ga, ^NatZn(α,x)⁶⁸Ga, and ⁶⁶Zn(α,pn)⁶⁸Ga for energies of up to 50 MeV. The generated recommended excitation functions were used to calculate the integral yield of these reactions. It was observed that the highest integral yield was for the reactions ^NatZn(α,x)⁶⁷Ge and ⁶⁸Ga: 850 and 450 MBq/µAh respectively. The alpha-particle activation of zinc could be a promising route for the production of ⁶⁷Ge and ⁶⁸Ga, especially at medium-energy machines.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123211"},"PeriodicalIF":2.5,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724684","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}

{"title":"Nuclear reaction experiments at TRIUMF-ISAC","authors":"Chris Ruiz","doi":"10.1016/j.nuclphysa.2025.123207","DOIUrl":"10.1016/j.nuclphysa.2025.123207","url":null,"abstract":"<div><div>The ISAC (Isotope Separator and Accelerator) Facility at TRIUMF contains two room temperature &amp; one superconducting linear accelerators able to provide rare isotope beams from 0.107 to 16.5 MeV/u, enabling reaction studies from well below the Coulomb barrier to far above it, accessing fusion-evaporation or highly-peripheral transfer reactions. Coupled with a suite of experimental facilities including a recoil separator (DRAGON), recoil spectrometer (EMMA), Compton-suppressed <em>γ</em>-ray array (TIGRESS), charged particle scattering devices (TUDA, SONIK, SHARC) and a solid hydrogen target facility (IRIS), a diverse program of nuclear reaction studies has been pursued. These range from direct and indirect cross section (or lifetime or branching ratio) measurements for nuclear astrophysics, to the study of nuclear shell evolution near the drip lines and islands of inversion, nuclear pairing, nuclear halo, cluster, or sub barrier fusion enhancement studies. These include the usage of devices brought by external users such as active target TPCs or custom reaction arrays. Recently effort has also been spent on reaction &amp; scattering studies related to in-house <em>ab initio</em> nuclear theory calculations. For this broad program I will give a brief overview of the facility and experimental stations and a selection of recent scientific results using radioactive and stable beams to illustrate the facility's capabilities.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1063 ","pages":"Article 123207"},"PeriodicalIF":1.7,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696593","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}