Nuclear Physics A最新文献_第3页

Observation of 12C(d,p)13C and 12C(d,d)12C reactions cross sections enhancement at MeV energy MeV能量下12C(d,p)13C和12C(d,d)12C反应截面增强的观察

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-10 DOI: 10.1016/j.nuclphysa.2025.123160

H. Salah , B. Touchrift , M. Makhloufi

引用次数: 0

Investigating the structure of 11B using particle-γ coincidences 利用粒子-γ巧合研究11B的结构

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-09 DOI: 10.1016/j.nuclphysa.2025.123138

S. Bottoni , G. Corbari , S. Leoni , B. Fornal , A. Goasduff , S. Capra , D. Mengoni , E. Albanese , S. Ziliani , G. Benzoni , A.M. Sánchez-Benítez , A. Bracco , D. Brugnara , F. Camera , M. Ciemała , N. Cieplicka-Oryńczak , F.C.L. Crespi , J.A. Dueñas , A. Gadea , F. Galtarossa , G. Zhang

{"title":"Investigating the structure of 11B using particle-γ coincidences","authors":"S. Bottoni , G. Corbari , S. Leoni , B. Fornal , A. Goasduff , S. Capra , D. Mengoni , E. Albanese , S. Ziliani , G. Benzoni , A.M. Sánchez-Benítez , A. Bracco , D. Brugnara , F. Camera , M. Ciemała , N. Cieplicka-Oryńczak , F.C.L. Crespi , J.A. Dueñas , A. Gadea , F. Galtarossa , G. Zhang","doi":"10.1016/j.nuclphysa.2025.123138","DOIUrl":"10.1016/j.nuclphysa.2025.123138","url":null,"abstract":"<div><div>The structure of <sup>11</sup>B was investigated at Legnaro National Laboratories of INFN using the <sup>6</sup>Li(<sup>6</sup>Li,p<em>γ</em>) fusion-evaporation reaction. Emitted protons feeding excited states of <sup>11</sup>B were detected by the GALTRACE silicon telescopes in coincidence with <em>γ</em> rays measured by the GALILEO HPGe array. The level and <em>γ</em>-decay scheme of <sup>11</sup>B was reconstructed on an even-by-event basis by combining particle and <em>γ</em>-ray spectroscopy techniques. In particular, the <em>γ</em> decay from the possible near-threshold proton resonance was searched for, providing first results on its <em>γ</em>-ray branch with a 5<em>σ</em> and 3<em>σ</em> confidence level. Results are discussed along with predictions of the Shell Model Embedded in the Continuum (SMEC).</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1062 ","pages":"Article 123138"},"PeriodicalIF":1.7,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069359","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

Short-range correlations in dynamical intranuclear cascade models for describing single-nucleon knockout and quasi-free (p,2p) fission reactions

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-09 DOI: 10.1016/j.nuclphysa.2025.123155

J.L. Rodríguez-Sánchez , J. Cugnon , J.-C. David , G. García-Jiménez , A. Graña-González , J. Hirtz

{"title":"Short-range correlations in dynamical intranuclear cascade models for describing single-nucleon knockout and quasi-free (p,2p) fission reactions","authors":"J.L. Rodríguez-Sánchez , J. Cugnon , J.-C. David , G. García-Jiménez , A. Graña-González , J. Hirtz","doi":"10.1016/j.nuclphysa.2025.123155","DOIUrl":"10.1016/j.nuclphysa.2025.123155","url":null,"abstract":"<div><div>The dynamical intranuclear cascade model INCL has been improved by including short-range nucleon-nucleon correlations (SRCs), which are mainly dominated by the formation of np pairs. This new development allows us to obtain a better description of peripheral collisions involving the knockout of a few nucleons in spallation and fragmentation reactions when INCL is coupled to de-excitation model ABLA. The new version of our dynamical model successfully describes inclusive single-neutron and single-proton knockout cross sections for various stable and exotic nuclei. The results show that the systematic strong dependence of the single-knockout cross section reduction factor on the neutron-proton separation energy asymmetry parameter obtained by Tostevin and Gade disappears when SRCs are taken into account. INCL+ABLA are also used to study the evolution of the quasi-free (p,2p)-fission cross section with the neutron excess or mass number (A) for exotic heavy nuclei.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1061 ","pages":"Article 123155"},"PeriodicalIF":1.7,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943515","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

Neutron dripline search for fluorine, neon and sodium and the discovery of 39Na at RIKEN RIBF 中子滴线搜寻氟、氖和钠以及在RIKEN RIBF发现39Na

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-08 DOI: 10.1016/j.nuclphysa.2025.123154

Toshiyuki Kubo, RIKEN RIBF new isotope collaboration

引用次数: 0

Investigation of excited-state quantum phase transitions in the U(5)↔SO(6) transitional region by the recurrence formula and Jacobi matrix 用递推公式和Jacobi矩阵研究U(5)↔SO(6)过渡区中激发态量子相变

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-08 DOI: 10.1016/j.nuclphysa.2025.123143

Z. Mollaei, M.A. Jafarizadeh, N. Amiri, N. Fouladi

{"title":"Investigation of excited-state quantum phase transitions in the U(5)↔SO(6) transitional region by the recurrence formula and Jacobi matrix","authors":"Z. Mollaei, M.A. Jafarizadeh, N. Amiri, N. Fouladi","doi":"10.1016/j.nuclphysa.2025.123143","DOIUrl":"10.1016/j.nuclphysa.2025.123143","url":null,"abstract":"<div><div>In this paper, we have theoretically studied the Excited State Quantum Phase Transition <span><math><mo>(</mo><mi>E</mi><mi>S</mi><mi>Q</mi><mi>P</mi><mi>T</mi><mo>)</mo></math></span>. For this purpose, based on the formulas of the inverse relation and the Jacobian matrix from the theory of orthogonal polynomials, we have presented a numerical solution for the model transition between the two phases <span><math><mi>U</mi><mo>(</mo><mn>5</mn><mo>)</mo></math></span> and <span><math><mi>O</mi><mo>(</mo><mn>6</mn><mo>)</mo></math></span>. We have obtained the energy spectrum of the excited states for the given <em>N</em> and we have observed the transition region well in it. One of the prominent features of the energy spectrum is that for a given <em>N</em>, all the excited states are acquired. The absence of level crossing between levels is another characteristic of the spectrum, the reason for which can be proven using orthogonal polynomials. In addition, the expected value of the number of bosons and the ratio of the energy gaps have been studied, yielding good results in relation to them.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1062 ","pages":"Article 123143"},"PeriodicalIF":1.7,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084711","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

Excited s-wave 1−− vector mesons, their leptonic decays and (in-)complete absence of abnormal states as seen from the constituent quark BSE 激发s波1−−矢量介子，它们的轻子衰变和（在）完全没有异常状态，从组成夸克BSE来看

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-08 DOI: 10.1016/j.nuclphysa.2025.123144

V. Šauli

{"title":"Excited s-wave 1−− vector mesons, their leptonic decays and (in-)complete absence of abnormal states as seen from the constituent quark BSE","authors":"V. Šauli","doi":"10.1016/j.nuclphysa.2025.123144","DOIUrl":"10.1016/j.nuclphysa.2025.123144","url":null,"abstract":"<div><div>Within a lattice inspired interaction between quark and antiquark, we obtain a hierarchy of solutions to the Bethe-Salpeter equation (BSE) for vector quarkonia excited states in the constituent quark mass approximation. As a toy model, we apply the similar to calculate ground and excited states of <em>ϕ</em> and <span><math><mi>ω</mi><mo>/</mo><mi>ρ</mi></math></span> meson. Through detailed numerical searches, our study provides evidence that the single-valued constant mass quark propagator does not yield known meson spectra without the simultaneous presence of abnormal (unphysical) solutions. We classify normal and abnormal solutions and discuss necessary changes in the calculation scheme to avoid the spectrum of inconsistent solutions. While all experimental narrow vector mesons are identified with a normal state of the BSE, the occurrence of mutually cancelled normal-abnormal states are reported. The results are slightly different for the heavy and light mesons, but in both cases they seem to result from the inconsistent use of the homogeneous BSE to describe broad resonances.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1062 ","pages":"Article 123144"},"PeriodicalIF":1.7,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948784","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

Opportunities for isomer studies for astrophysics at FRIB FRIB天体物理学同分异构体研究的机会

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-07 DOI: 10.1016/j.nuclphysa.2025.123118

S.D. Pain, ORRUBA collaboration

引用次数: 0

In-beam γ-ray spectroscopy with fast-neutron probes at NFS 快中子探针在NFS的束内γ射线能谱分析

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-07 DOI: 10.1016/j.nuclphysa.2025.123135

H. Sengar , E. Clément , D. Ackermann , O. Aktas , L. de Arruda , G. de France , P. Dessagne , G. Henning , I. Jangid , D. Kalaydjieva , M. Kerveno , N. Kumar , X. Ledoux , A. Lemasson , I. Matea , P. Miriot-jaubert , A. Navin , J. Piot , D. Ramos , T. Roger , T. Tanaka

引用次数: 0

Shell model study of isobaric analog states for |Tz| = 3/2 nuclei using isospin-breaking interactions |Tz| = 3/2核等压模拟态的壳层模型研究

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-05 DOI: 10.1016/j.nuclphysa.2025.123139

Sakshi Shukla, Praveen C. Srivastava, Chandan Sarma

{"title":"Shell model study of isobaric analog states for |Tz| = 3/2 nuclei using isospin-breaking interactions","authors":"Sakshi Shukla, Praveen C. Srivastava, Chandan Sarma","doi":"10.1016/j.nuclphysa.2025.123139","DOIUrl":"10.1016/j.nuclphysa.2025.123139","url":null,"abstract":"<div><div>In mirror nuclei, the mirror energy difference in the excited states is caused by isospin-symmetry breaking. In the present work, the mechanism underlying mirror energy differences in mirror-pair is explored within the shell model formalism. For that, we performed shell-model calculations by focusing on the <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>z</mi></mrow></msub><mo>=</mo><mo>±</mo><mn>3</mn><mo>/</mo><mn>2</mn></math></span> mirror pairs across <em>sd</em>-shell nuclei in the mass range <em>A</em>= 19-37. We used two recently developed USD-family isospin symmetry-breaking interactions, USDC and USDCm, for this purpose to explore low-lying energy spectra and mirror energy differences. The influence of single-particle states, particularly those of the <em>s</em>-wave, on weakly bound and unbound nuclear states was examined. Additionally, we also explored electromagnetic properties such as <em>E2</em> transition probability, magnetic (<em>μ</em>), and quadrupole moments (<em>Q</em>) of those mirror pairs and compared them with the experimental data. Furthermore, we evaluated the isoscalar (<span><math><msub><mrow><mi>M</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span>) and isovector (<span><math><msub><mrow><mi>M</mi></mrow><mrow><mn>1</mn></mrow></msub></math></span>) matrix elements of the <em>E2</em> transition probabilities along with calculating the single proton/neutron separation energies. While the calculated results using both these interactions are in good agreement with the experimental data, the USDCm performs better for mirror energy differences.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1061 ","pages":"Article 123139"},"PeriodicalIF":1.7,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923847","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

Spectroscopy of neutron-rich nuclei produced in multinucleon transfer reactions at KISS KISS多核子转移反应中产生的富中子核光谱学

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-05-05 DOI: 10.1016/j.nuclphysa.2025.123140

Y.X. Watanabe , Y. Hirayama , M. Mukai , P. Schury , T. Niwase , S. Kimura , M. Rosenbusch , T. Hashimoto , J.Y. Moon , H. Ishiyama , S. Iimura , H. Miyatake , M. Wada , KISS collaboration

{"title":"Spectroscopy of neutron-rich nuclei produced in multinucleon transfer reactions at KISS","authors":"Y.X. Watanabe , Y. Hirayama , M. Mukai , P. Schury , T. Niwase , S. Kimura , M. Rosenbusch , T. Hashimoto , J.Y. Moon , H. Ishiyama , S. Iimura , H. Miyatake , M. Wada , KISS collaboration","doi":"10.1016/j.nuclphysa.2025.123140","DOIUrl":"10.1016/j.nuclphysa.2025.123140","url":null,"abstract":"<div><div>Multinucleon transfer (MNT) reactions have recently gained renewed interest as they provide access to heavy neutron-rich nuclei, particularly around <span><math><mi>N</mi><mo>=</mo><mn>126</mn></math></span> and actinides, which are relevant to r-process nucleosynthesis. They produce a wide variety of nuclides around both the projectile and the target, with a wide distribution of angles and energies, requiring the development of experimental techniques to collect, separate, and identify the reaction products of interest. In particular, exotic nuclei far from the projectile or target are produced so infrequently that they can get buried among more abundant reaction products. We are developing the KEK Isotope Separation System (KISS) at the RIBF facility of RIKEN, which focuses on the extraction of MNT reaction products. We perform decay, mass, and laser spectroscopy of neutron-rich nuclei of refractory elements around the <span><math><mi>N</mi><mo>=</mo><mn>126</mn></math></span> region. A multi-reflection time-of-flight mass spectrograph is used for high-precision mass measurements and unique identification of isobars. Recently, research has been extended to mass spectroscopy of neutron-rich actinides by using a <sup>238</sup>U beam. The experimental methods and results of KISS as well as its next plan for further neutron-rich regions will be presented.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1061 ","pages":"Article 123140"},"PeriodicalIF":1.7,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923883","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