Nuclear Physics A最新文献_第2页

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

The impact of deuteron breakup and neutron transfer in the d + 10B collision d + 10B碰撞中氘核破裂和中子转移的影响

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.2025.123141

N. Amangeldi , Awad A. Ibraheem , E. Al-Jahwashi , Rehab Yajzey , A.H. Al-Ghamdi , L.S. El-sherif , Sh. Hamada

{"title":"The impact of deuteron breakup and neutron transfer in the d + 10B collision","authors":"N. Amangeldi , Awad A. Ibraheem , E. Al-Jahwashi , Rehab Yajzey , A.H. Al-Ghamdi , L.S. El-sherif , Sh. Hamada","doi":"10.1016/j.nuclphysa.2025.123141","DOIUrl":"10.1016/j.nuclphysa.2025.123141","url":null,"abstract":"<div><div>The recently measured angular distribution data for elastic <sup>10</sup>B(<em>d,d</em>)<sup>10</sup>B and inelastic <sup>10</sup>B(<em>d,d</em>)<sup>10</sup>B* scattering at a deuteron energy (<em>E</em><sub>d</sub>) of 14.500 MeV—with transitions to the (1<sup>+</sup>, 0.718 MeV) and (1<sup>+</sup>, 2.154 MeV) excited states of <sup>10</sup>B—were analyzed. Additionally, data for the <sup>10</sup>B(<em>d,t</em>)<sup>9</sup>B neutron pickup reaction involving transitions to the (3/2<sup>-</sup>, 0.000 MeV), (5/2<sup>-</sup>, 2.361 MeV), and (5/2<sup>+</sup>, 2.788 MeV) states of <sup>9</sup>B [N. Saduyev et al., <em>Physics</em> 6 (2024) 1098], as well as the earlier data for the <sup>10</sup>B(<em>d,n</em>)<sup>11</sup>C proton stripping reaction at <em>E<sub>d</sub></em> = 11.8 MeV transitioning to the (3/2<sup>-</sup>, 0.000 MeV) ground state of <sup>11</sup>C, were theoretically studied within the Continuum-Discretized Coupled-Channel (CDCC) and Coupled-Reaction-Channel (CRC) methods. The analysis shows that at forward scattering angles, the elastic scattering data are well reproduced by parameter-free CDCC calculations, which account for deuteron breakup effects. However, at larger backward angles, virtual effects from neutron transfer reactions become significant, while those from proton transfer are insignificant.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1061 ","pages":"Article 123141"},"PeriodicalIF":1.7,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935326","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

Decay of 131La 131La的衰变

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.2025.123142

S. Banerjee , S. Bhattacharyya , S. Chakraborty , Soumik Bhattacharya , G. Mukherjee , S.S. Nayak , Snigdha Pal , Suchorita Paul , A. Pal , D. Kumar , R. Banik , S. Panwar , S. Basu , S. Das Gupta , R. Raut , S.S. Ghugre , Pankaj K. Giri , A. Sharma , S. Kundu , C. Majumder , H. Rahaman

{"title":"Decay of 131La","authors":"S. Banerjee , S. Bhattacharyya , S. Chakraborty , Soumik Bhattacharya , G. Mukherjee , S.S. Nayak , Snigdha Pal , Suchorita Paul , A. Pal , D. Kumar , R. Banik , S. Panwar , S. Basu , S. Das Gupta , R. Raut , S.S. Ghugre , Pankaj K. Giri , A. Sharma , S. Kundu , C. Majumder , H. Rahaman","doi":"10.1016/j.nuclphysa.2025.123142","DOIUrl":"10.1016/j.nuclphysa.2025.123142","url":null,"abstract":"<div><div>The half-life of the ground state of <sup>131</sup>La has been measured using high resolution <em>γ</em>-spectroscopy techniques. The activity was obtained using <sup>124</sup>Sn foil irradiated by <sup>14</sup>N beam of energy 115 MeV, delivered by the K-130 Cyclotron at the Variable Energy Cyclotron Centre (VECC), Kolkata. The active foil was counted for 5 h using 11 Compton-suppressed Clover HPGe detectors of the Indian National Gamma Array (INGA) facility. A half-life of 60.17(1) min has been obtained from the present measurements. Several <em>γ</em>-transitions, tentatively placed in the level scheme of <sup>131</sup>La from previous works, have been confirmed from the present study. The decay half-lives of the <span><math><msup><mrow><mn>6</mn></mrow><mrow><mo>−</mo></mrow></msup></math></span> isomeric state in <sup>132</sup>La at 188.2 keV and ground state of <sup>130</sup>La have also been measured as 24.0(4) min and 8.6(2) min, respectively, from the present data.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1061 ","pages":"Article 123142"},"PeriodicalIF":1.7,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923841","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

Simultaneous calculation of elastic scattering, transfer, breakup, and other direct cross sections for d+197Au reaction 同时计算d+197Au反应的弹性散射、转移、破裂等直接截面

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-04-30 DOI: 10.1016/j.nuclphysa.2025.123137

H.M. Maridi , D.K. Sharp , J. Lubian

引用次数: 0

Moments of inertia in IBM IBM的转动惯量

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-04-30 DOI: 10.1016/j.nuclphysa.2025.123134

A.D. Efimov , I.V. Koval , I.N. Izosimov , P.N. Usmanov

引用次数: 0

Measurement of radiative decay width of the Hoyle state of 12C via 12C(p, p′)12C reaction 12C（p, p′）12C反应测量12C霍伊尔态辐射衰减宽度

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-04-30 DOI: 10.1016/j.nuclphysa.2025.123133

T.K. Rana , Deepak Pandit , S. Manna , Samir Kundu , K. Banerjee , A. Sen , R. Pandey , G. Mukherjee , T.K. Ghosh , S.S. Nayak , R. Shil , P. Karmakar , K. Atreya , K. Rani , D. Paul , R. Santra , A. Sultana , S. Basu , S. Pal , S. Sadhukhan , C. Bhattacharya

{"title":"Measurement of radiative decay width of the Hoyle state of 12C via 12C(p, p′)12C reaction","authors":"T.K. Rana , Deepak Pandit , S. Manna , Samir Kundu , K. Banerjee , A. Sen , R. Pandey , G. Mukherjee , T.K. Ghosh , S.S. Nayak , R. Shil , P. Karmakar , K. Atreya , K. Rani , D. Paul , R. Santra , A. Sultana , S. Basu , S. Pal , S. Sadhukhan , C. Bhattacharya","doi":"10.1016/j.nuclphysa.2025.123133","DOIUrl":"10.1016/j.nuclphysa.2025.123133","url":null,"abstract":"<div><div>The Hoyle state, the second excited state of <sup>12</sup>C at an excitation energy of 7.65 MeV, plays a vital role in nucleosynthesis. Its radiative decay width serves as a crucial channel for the formation of <sup>12</sup>C and all heavier elements in the Universe. To investigate this, exclusive experiments were conducted to measure the radiative decay width of the Hoyle state via the <sup>12</sup>C(p, p′)<sup>12</sup>C reaction. The radiative decay branching ratio <span><math><msub><mrow><mi>Γ</mi></mrow><mrow><mi>r</mi><mi>a</mi><mi>d</mi></mrow></msub></math></span>/Γ was determined to be 4.03(21) × 10<sup>−4</sup>. Based on the currently accepted values of <span><math><msub><mrow><mi>Γ</mi></mrow><mrow><mi>π</mi></mrow></msub><mo>(</mo><mi>E</mi><mn>0</mn><mo>)</mo><mo>/</mo><mi>Γ</mi></math></span> and <span><math><msub><mrow><mi>Γ</mi></mrow><mrow><mi>π</mi></mrow></msub><mo>(</mo><mi>E</mi><mn>0</mn><mo>)</mo></math></span>, the radiative width of the Hoyle state was calculated as 3.75(40) × 10<sup>−3</sup> eV.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1060 ","pages":"Article 123133"},"PeriodicalIF":1.7,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903464","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