Nuclear Physics A最新文献_第5页

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

Measurements of the nuclear charge distribution in heavy-ion collisions with Breit-Wheeler process 用Breit-Wheeler过程测量重离子碰撞中的核电荷分布

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.2025.123136

Xiaofeng Wang, Chi Yang

引用次数: 0

Electromagnetic probes of the quantum chromodynamical plasma 量子色动力学等离子体的电磁探针

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-04-28 DOI: 10.1016/j.nuclphysa.2025.123119

Gojko Vujanovic

引用次数: 0

Neutron capture measurements at UMass lowell research reactor 马萨诸塞大学洛井研究堆中子捕获测量

IF 1.7 4区物理与天体物理

Nuclear Physics A Pub Date : 2025-04-28 DOI: 10.1016/j.nuclphysa.2025.123116

M. Jandel , L.M. Bobek , D.E. Fernandez , A.G. Fishbein , H.A. Green , A. Howe , K. Konomi , C.J. Lister , T.M. Regan , S. Valenta , E.A. McCutchan , S. Ota

{"title":"Neutron capture measurements at UMass lowell research reactor","authors":"M. Jandel , L.M. Bobek , D.E. Fernandez , A.G. Fishbein , H.A. Green , A. Howe , K. Konomi , C.J. Lister , T.M. Regan , S. Valenta , E.A. McCutchan , S. Ota","doi":"10.1016/j.nuclphysa.2025.123116","DOIUrl":"10.1016/j.nuclphysa.2025.123116","url":null,"abstract":"<div><div>A new facility was designed around the thermal column beam port of the 1 MW Research Reactor at the University of Massachusetts Lowell. Thermal neutrons are collimated to a 1-inch diameter beam and incident on samples to induce the radiative neutron capture. New measurements of capture gamma rays are planned for Mn, Cu, Ni, Cr, and Gd samples in the next few years. The experiments will be carried out in close collaboration with the ENSDF (Evaluated Nuclear Structure Data File) evaluation group at Brookhaven National Laboratory. The gamma rays are measured using an array of high-resolution HPGe detectors. Some of the HPGe detectors use active Compton shields that were designed from scintillation detectors and improve significantly the signal-to-background in the measured gamma-ray spectra with HPGe. The experimental spectra will be validated by the GEANT4 simulations of the array and theoretical models of the emission of gamma rays from the compound nucleus. The new experimental results on the capture gamma ray intensities will be incorporated in future ENSDF evaluations.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1060 ","pages":"Article 123116"},"PeriodicalIF":1.7,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903463","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