Nuclear Physics A最新文献

{"title":"Threshold anomalies in 9Be + 12C","authors":"F. Torabi ,&nbsp;E.F. Aguilera ,&nbsp;B.V. Carlson","doi":"10.1016/j.nuclphysa.2023.122793","DOIUrl":"https://doi.org/10.1016/j.nuclphysa.2023.122793","url":null,"abstract":"<div><p>The extended optical model is used to simultaneously analyze the elastic scattering and fusion data for the weakly-bound system of ⁹Be + ¹²C in the low-energy region. Dynamic polarization potentials <span><math><msub><mrow><mi>U</mi></mrow><mrow><mi>F</mi></mrow></msub></math></span>, <span><math><msub><mrow><mi>U</mi></mrow><mrow><mi>D</mi></mrow></msub></math></span>, associated with fusion and direct couplings, respectively, are introduced. Corresponding fitting parameters leading to dispersive potentials are found, which provide good simultaneous descriptions of elastic and fusion data. The energy-dependent behavior of the polarization potentials establishes a striking difference with respect to that observed for weakly bound projectiles, including ⁹Be, on medium- and heavy-mass targets. Contrary to similar analyses made on weakly-bound systems, the real part of <span><math><msub><mrow><mi>U</mi></mrow><mrow><mi>D</mi></mrow></msub></math></span> is found to be attractive in the present case. The observed behavior is discussed.</p></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0375947423001963/pdfft?md5=06dde4fc0800f53aede95170fa006c88&pid=1-s2.0-S0375947423001963-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134832580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electromagnetic properties of Λ hypernuclei with a beyond relativistic mean-field approach","authors":"Y.G. Yao ,&nbsp;X.Y. Wu ,&nbsp;H. Mei","doi":"10.1016/j.nuclphysa.2023.122794","DOIUrl":"10.1016/j.nuclphysa.2023.122794","url":null,"abstract":"<div><p><span><span>We present a microscopic study of electromagnetic properties of the low-lying states of single-Λ </span>hypernucleus </span><span><math><msubsup><mrow></mrow><mrow><mi>Λ</mi></mrow><mrow><mn>9</mn></mrow></msubsup></math></span><span>Be using a quantum-number projected generator coordinate method (HyperGCM) based on covariant density functional theory<span>. All the configurations are restricted to have axial symmetry, with the Λ hyperon in the lowest-energy state. The results are compared to the predictions of a simple particle-rotor model (PRM), for which analytic expressions are available. We show that the electromagnetic properties of </span></span><span><math><msubsup><mrow></mrow><mrow><mi>Λ</mi></mrow><mrow><mn>9</mn></mrow></msubsup></math></span>Be from the HyperGCM calculation are close to those by the PRM. In particular, it is found that the magnetic moments and <em>M</em>1 transition strengths are less sensitive to the coupling strengths of the Λ<em>N</em><span> interaction than the electric quadrupole transition strengths. The latter may provide additional constraints on the Λ</span><em>N</em> interaction.</p></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135614895","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":"Quantum entanglement in top quark pair production","authors":"Mira Varma,&nbsp;Oliver K. Baker","doi":"10.1016/j.nuclphysa.2023.122795","DOIUrl":"10.1016/j.nuclphysa.2023.122795","url":null,"abstract":"<div><p>Top quarks, the most massive particles in the standard model<span>, attract considerable attention since they decay before hadronizing. This presents physicists with a unique opportunity to directly investigate their properties. In this letter, we expand upon the work of G. Iskander, J. Pan, M. Tyler, C. Weber and O. K. Baker to demonstrate that even with the most massive fundamental particle, we see the same manifestation of entanglement observed in both electroweak and electromagnetic interactions<span>. We propose that the thermal component resulting from protons colliding into two top quarks emerges from entanglement within the two-proton wave function. The presence of entanglement implies the coexistence of both thermal and hard scattering components in the transverse momentum distribution. We use published ATLAS and CMS results to show that the data exhibits the expected behavior.</span></span></p></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135615635","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":"Probing the hidden-bottom pentaquark resonances in photonuclear bottomonium production near threshold: Differential observables","authors":"E.Ya. Paryev","doi":"10.1016/j.nuclphysa.2023.122792","DOIUrl":"10.1016/j.nuclphysa.2023.122792","url":null,"abstract":"<div><p>We study the near-threshold <span><math><mi>ϒ</mi><mo>(</mo><mn>1</mn><mi>S</mi><mo>)</mo></math></span><span> meson photoproduction from protons and nuclei by considering incoherent direct non-resonant (</span><span><math><mi>γ</mi><mi>p</mi><mo>→</mo><mi>ϒ</mi><mo>(</mo><mn>1</mn><mi>S</mi><mo>)</mo><mi>p</mi></math></span>, <span><math><mi>γ</mi><mi>n</mi><mo>→</mo><mi>ϒ</mi><mo>(</mo><mn>1</mn><mi>S</mi><mo>)</mo><mi>n</mi></math></span>) and two-step resonant (<span><math><mi>γ</mi><mi>p</mi><mo>→</mo><msubsup><mrow><mi>P</mi></mrow><mrow><mi>b</mi><mi>i</mi></mrow><mrow><mo>+</mo></mrow></msubsup><mo>→</mo><mi>ϒ</mi><mo>(</mo><mn>1</mn><mi>S</mi><mo>)</mo><mi>p</mi></math></span>, <span><math><mi>γ</mi><mi>n</mi><mo>→</mo><msubsup><mrow><mi>P</mi></mrow><mrow><mi>b</mi><mi>i</mi></mrow><mrow><mn>0</mn></mrow></msubsup><mo>→</mo><mi>ϒ</mi><mo>(</mo><mn>1</mn><mi>S</mi><mo>)</mo><mi>n</mi></math></span>, <span><math><mi>i</mi><mo>=</mo><mn>1</mn></math></span>, 2, 3; <span><math><msubsup><mrow><mi>P</mi></mrow><mrow><mi>b</mi><mn>1</mn></mrow><mrow><mo>+</mo><mo>,</mo><mn>0</mn></mrow></msubsup><mo>=</mo><msubsup><mrow><mi>P</mi></mrow><mrow><mi>b</mi></mrow><mrow><mo>+</mo><mo>,</mo><mn>0</mn></mrow></msubsup><mo>(</mo><mn>11080</mn><mo>)</mo></math></span>, <span><math><msubsup><mrow><mi>P</mi></mrow><mrow><mi>b</mi><mn>2</mn></mrow><mrow><mo>+</mo><mo>,</mo><mn>0</mn></mrow></msubsup><mo>=</mo><msubsup><mrow><mi>P</mi></mrow><mrow><mi>b</mi></mrow><mrow><mo>+</mo><mo>,</mo><mn>0</mn></mrow></msubsup><mo>(</mo><mn>11125</mn><mo>)</mo></math></span>, <span><math><msubsup><mrow><mi>P</mi></mrow><mrow><mi>b</mi><mn>3</mn></mrow><mrow><mo>+</mo><mo>,</mo><mn>0</mn></mrow></msubsup><mo>=</mo><msubsup><mrow><mi>P</mi></mrow><mrow><mi>b</mi></mrow><mrow><mo>+</mo><mo>,</mo><mn>0</mn></mrow></msubsup><mo>(</mo><mn>11130</mn><mo>)</mo></math></span>) bottomonium production processes with the main goal of clarifying the possibility to observe the non-strange hidden-bottom pentaquark states <span><math><msubsup><mrow><mi>P</mi></mrow><mrow><mi>b</mi><mi>i</mi></mrow><mrow><mo>+</mo><mo>,</mo><mn>0</mn></mrow></msubsup></math></span> in this production via differential observables. We calculate the absolute excitation functions, energy and momentum distributions for the non-resonant, resonant and for the combined (non-resonant plus resonant) production of <span><math><mi>ϒ</mi><mo>(</mo><mn>1</mn><mi>S</mi><mo>)</mo></math></span><span> mesons on protons, on carbon and tungsten target nuclei at near-threshold incident photon beam energies by assuming the spin-parity assignments of the hypothetical hidden-bottom resonances </span><span><math><msubsup><mrow><mi>P</mi></mrow><mrow><mi>b</mi></mrow><mrow><mo>+</mo><mo>,</mo><mn>0</mn></mrow></msubsup><mo>(</mo><mn>11080</mn><mo>)</mo></math></span>, <span><math><msubsup><mrow><mi>P</mi></mrow><mrow><mi>b</mi></mrow><mrow><mo>+</mo><mo>,</mo><mn>0</mn></mrow></msubsup><mo>(</mo><mn>11125</mn><mo>)</","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135609201","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":"Evaporation residue cross-section measurements for 30Si+142Ce system","authors":"Amninderjeet Kaur ,&nbsp;A. Kumar ,&nbsp;Chetan Sharma ,&nbsp;Neha Dhanda ,&nbsp;Raghav ,&nbsp;N. Madhavan ,&nbsp;S. Nath ,&nbsp;J. Gehlot ,&nbsp;Gonika ,&nbsp;Chandra Kumar ,&nbsp;P. Sherpa ,&nbsp;A. Parihari ,&nbsp;Jyoti Pandey ,&nbsp;A.K. Gupta ,&nbsp;H.P. Sharma ,&nbsp;B.R. Behera","doi":"10.1016/j.nuclphysa.2023.122791","DOIUrl":"10.1016/j.nuclphysa.2023.122791","url":null,"abstract":"<div><p>Evaporation residue (ER) cross-sections were measured for ³⁰Si+¹⁴²Ce reaction at laboratory energies in the range of 105 - 132 MeV using the HYbrid Recoil mass Analyzer (HYRA) at IUAC, New Delhi. The transmission efficiency of the HYRA was estimated using the calibration reaction ²⁸Si+¹⁴²Ce. Sub-barrier fusion enhancement was observed when compared with the one-dimensional barrier penetration model predictions for the present system. To explore the phenomena responsible for sub-barrier fusion enhancement, coupled-channels calculations were performed using the CCFULL code. The effect of couplings and the role of positive <em>Q</em>-value neutron transfer (PQNT) channels on sub-barrier fusion cross-sections were investigated. Coupled-channels calculations were able to reproduce the data by including the coupling in both projectile and target nucleus along with two neutron-transfer channels having positive <em>Q</em>-value. The measured ER cross-sections were compared with the nearby systems to explore the role of deformation of the colliding nuclei.</p></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135614488","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":"Impact of nuclear rotation corrections on alpha decay half-lives of superheavy nuclei within 98 ≤ Z ≤ 120","authors":"Theeb Y.T. Alsultan ,&nbsp;Joshua T. Majekodunmi ,&nbsp;Raj Kumar ,&nbsp;Boon Tong Goh ,&nbsp;M. Bhuyan","doi":"10.1016/j.nuclphysa.2023.122784","DOIUrl":"https://doi.org/10.1016/j.nuclphysa.2023.122784","url":null,"abstract":"<div><p>The influence of nuclear rotation on the decay half-lives of superheavy nuclei within the range <span><math><mn>98</mn><mo>≤</mo><mi>Z</mi><mo>≤</mo><mn>120</mn></math></span> is investigated using the axially deformed relativistic Hartree-Bogoliubov theory in the continuum (DRHBc) with the PC-PK1 parameter set. The deduced DRHBc decay energies (with and without the rotation effect) are compared with those calculated from the macroscopic-microscopic WS4 and the available experimental binding energies. Six semi-empirical formulae, such as the Viola-Seaborg formula (VSS), the modified Brown formula (mB1), the semi-empirical relationship based on fission theory (SemFIS2), the Royer formula (R), the Wang formula (Wang) and the modified YQZR formula (MYQZR) are employed to estimate the half-lives of <em>α</em> decay. Among these formulae, the half-live predictions of SemFIS2 are found to gradually deviate from the systematic trend beyond <span><math><msub><mrow><mi>N</mi></mrow><mrow><mi>d</mi></mrow></msub><mo>=</mo><mn>184</mn></math></span>, showing that the probability of undergoing spontaneous fission is less feasible beyond this point. A minimum is observed at <span><math><msub><mrow><mi>N</mi></mrow><mrow><mi>d</mi></mrow></msub><mo>=</mo><mn>184</mn></math></span>, reflecting its neutron shell closure for the mass region considered on the nuclear chart. The results further indicate that, for <span><math><mn>98</mn><mo>≤</mo><mi>Z</mi><mo>≤</mo><mn>104</mn></math></span>, the predictions of all semi-empirical formulae are more closely matched to the available experimental data when the rotation effect is taken into account. However, we have demonstrated that the effect of nuclear rotation gradually reduces as the atomic nucleus becomes heavier.</p></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0375947423001872/pdfft?md5=cc80d1c6be7caab7202209420d24876f&pid=1-s2.0-S0375947423001872-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134655743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of fast neutron reactions in natural lutetium","authors":"A.M. Savrasov ,&nbsp;O.M. Gorbachenko ,&nbsp;V.M. Morozyuk ,&nbsp;I.M. Kadenko ,&nbsp;V.A. Zheltonozhsky","doi":"10.1016/j.nuclphysa.2023.122788","DOIUrl":"https://doi.org/10.1016/j.nuclphysa.2023.122788","url":null,"abstract":"<div><p>The cross-sections and isomeric ratios of the cross-sections for the reaction ¹⁷⁶Lu(n,<em>γ</em>)<span><math><msup><mrow></mrow><mrow><mn>177</mn><mi>m</mi><mo>,</mo><mi>g</mi></mrow></msup></math></span>Lu were obtained for the first time on a base of experimental and evaluated data with the MCNP simulation of scattered neutron spectra. The cross-sections of the reactions ¹⁷⁵Lu(n,p)¹⁷⁵Yb, ¹⁷⁵Lu(n,<em>α</em>)¹⁷²Tm, and ¹⁷⁶Lu(n,<em>α</em>)¹⁷³Tm were precised at a neutron energy of 14.6±0.3 MeV and used for checking up our cross section determination procedure. The account of scattered neutrons to the nuclear reaction was estimated with the MCNP 4c code and TALYS-1.96, EMPIRE 3.2.3 codes calculations. Even with a proper consideration of scattered neutrom spectra, the ¹⁷⁶Lu(n,<em>γ</em>)<span><math><msup><mrow></mrow><mrow><mn>177</mn><mi>m</mi><mo>,</mo><mi>g</mi></mrow></msup></math></span>Lu reaction cross section appeared rather greater than the calculations with the TALYS, EMPIRE codes and evaluations within the ENDF/B-VIII.0, TENLD-2021, JEFF-3 data bases and libraries.</p></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0375947423001914/pdfft?md5=8e47e4e4af9a2eee578a1901a305b382&pid=1-s2.0-S0375947423001914-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134655744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3-dimensional flow analysis: A novel tool to study the collision geometry and the equation-of-state","authors":"Tom Reichert ,&nbsp;Jan Steinheimer ,&nbsp;Marcus Bleicher","doi":"10.1016/j.nuclphysa.2023.122790","DOIUrl":"https://doi.org/10.1016/j.nuclphysa.2023.122790","url":null,"abstract":"<div><p>We propose to extend the commonly known flow analysis in the transverse <span><math><msub><mrow><mi>p</mi></mrow><mrow><mi>x</mi></mrow></msub></math></span>-<span><math><msub><mrow><mi>p</mi></mrow><mrow><mi>y</mi></mrow></msub></math></span> plane to novel flow coefficients based on the angular distribution in the <span><math><msub><mrow><mi>p</mi></mrow><mrow><mi>x</mi></mrow></msub></math></span>-<span><math><msub><mrow><mi>p</mi></mrow><mrow><mi>z</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>p</mi></mrow><mrow><mi>y</mi></mrow></msub></math></span>-<span><math><msub><mrow><mi>p</mi></mrow><mrow><mi>z</mi></mrow></msub></math></span> planes. The new flow coefficients, called <span><math><msub><mrow><mi>u</mi></mrow><mrow><mi>n</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>w</mi></mrow><mrow><mi>n</mi></mrow></msub></math></span> (in addition to <span><math><msub><mrow><mi>v</mi></mrow><mrow><mi>n</mi></mrow></msub></math></span>), turn out to be also highly sensitive to the nuclear Equation-of-State and can be used to explore the EoS in more detail than is possible using only <span><math><msub><mrow><mi>v</mi></mrow><mrow><mi>n</mi></mrow></msub></math></span>. As an example to quantify the effect of the EoS, the Ultra-relativistic Quantum Molecular Dynamics (UrQMD) model is used to investigate 20-30% central Au+Au collisions at E<span><math><mmultiscripts><mrow><mo>=</mo></mrow><mprescripts></mprescripts><mrow><mi>lab</mi></mrow><none></none></mmultiscripts><mn>1.23</mn><mspace></mspace><mi>A</mi></math></span> <!-->GeV.</p></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0375947423001938/pdfft?md5=6746be4385d3302178f40a66b8cd0ea6&pid=1-s2.0-S0375947423001938-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134832581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the influence of input angular momentum on independence hypothesis in heavy-ion induced fusion reactions","authors":"M. Shariq Asnain ,&nbsp;Manoj Kumar Sharma ,&nbsp;Mohd. Shuaib ,&nbsp;Aquib Siddique ,&nbsp;Ishfaq Majeed Bhat ,&nbsp;B.P. Singh ,&nbsp;R. Prasad","doi":"10.1016/j.nuclphysa.2023.122786","DOIUrl":"https://doi.org/10.1016/j.nuclphysa.2023.122786","url":null,"abstract":"<div><p>The experimental verification of compound nucleus theory has successfully been performed for light ion induced reactions using proton and <em>α</em>-particle beams on different targets. However, such studies using the heavy ion beams are scarce due to the complex nature of heavy ion interaction process. The present work is an attempt to validate the Bohr's independent hypothesis using heavy ion beam of ¹⁸O beam on ¹⁵⁹Tb targets and ¹²C on ¹⁶⁵Ho targets, forming the same compound nucleus ¹⁷⁷Ta. A channel wise analysis of cross section data for evaporation residues produced in ¹⁸O+¹⁵⁹Tb and ¹²C+¹⁶⁵Ho systems has been performed within the framework of statistical model code PACE4 and found to reasonably agree with the experimental data. Further, a comparison of reaction cross section data for the same evaporation residues produced in the two different systems has been found to follow Bohr's compound nucleus hypothesis at relatively higher excitation energies. However, at relatively lower excitation energies, a significant deviation in the measured cross section data of the same residues in the above mentioned systems have been observed and is attributed to the discrepancies in angular momentum values. Such discrepancies are well explained on the basis of input angular momentum involved in the reactions.</p></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0375947423001896/pdfft?md5=89c0a0eb5a836d97f8319ba0ec8464ac&pid=1-s2.0-S0375947423001896-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92025089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Peripheral reactions and elastic scattering induced by strongly bound, weakly bound and exotic nuclei","authors":"J.E. Testoni,&nbsp;D. Abriola,&nbsp;G.V. Martí","doi":"10.1016/j.nuclphysa.2023.122785","DOIUrl":"https://doi.org/10.1016/j.nuclphysa.2023.122785","url":null,"abstract":"<div><p>A phenomenological study of peripheral reactions induced by strongly bound, weakly bound and exotic projectiles on different targets is presented. A large number of experimental elastic scattering differential cross sections at energies close to the Coulomb barrier is studied on the basis of a simple nuclear optical model potential that depends on a small number of parameters. The derived wave functions, together with the imaginary component of the optical potential, allow the analysis of the radial peripheral absorption density distributions for the different kind of projectiles. These distributions, when appropriately normalized, show a clear correlation with the type of projectile regardless of the involved target and indicate that projectiles more prone to break up show a more peripheral absorption density distribution. This manifests in their magnitude, location and width. The relationship of these variables in the strongly bound group and the weakly bound group are described with a simple exponential function, while the exotic projectiles show two distinct groups, namely the neutron-halo and the proton-halo. For the neutron-halo projectiles such as <span><math><mmultiscripts><mrow><mtext>He</mtext></mrow><mprescripts></mprescripts><none></none><mrow><mn>6</mn></mrow></mmultiscripts></math></span>, <span><math><mmultiscripts><mrow><mtext>Li</mtext></mrow><mprescripts></mprescripts><none></none><mrow><mn>11</mn></mrow></mmultiscripts></math></span> and <span><math><mmultiscripts><mrow><mtext>Be</mtext></mrow><mprescripts></mprescripts><none></none><mrow><mn>11</mn></mrow></mmultiscripts></math></span> there is a notable increment of the radial peripheral absorption density peak and the total reaction cross section as the breakup separation energy decreases. The same relationship is established for the proton-halo projectiles <span><math><mmultiscripts><mrow><mtext>B</mtext></mrow><mprescripts></mprescripts><none></none><mrow><mn>8</mn></mrow></mmultiscripts></math></span> and <span><math><mmultiscripts><mrow><mtext>F</mtext></mrow><mprescripts></mprescripts><none></none><mrow><mn>17</mn></mrow></mmultiscripts></math></span> but their reduced effective dipole charge leads to a lower probability of dipole Coulomb breakup that results in a substantial reduction in the extent of their peripheral absorption.</p></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0375947423001884/pdfft?md5=c7fca3a3d2e00ff535c4a898626451d2&pid=1-s2.0-S0375947423001884-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92025087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}