The European Physical Journal A最新文献

{"title":"Potential for tensor polarized deuterons in Hall D at Jefferson lab","authors":"Mark M. Dalton,&nbsp;Alexandre Deur,&nbsp;Christopher D. Keith","doi":"10.1140/epja/s10050-025-01580-y","DOIUrl":"10.1140/epja/s10050-025-01580-y","url":null,"abstract":"<div><p>Hall D at Jefferson lab is an ideal place to install a polarized deuteron target which can be “tensor polarized”, allowing the separation of the spin states <span>(m=0,pm 1)</span> or the measurement of tensor asymmetries. The bremsstrahlung photon beam with 12 GeV endpoint provides very little heating or radiation damage compared to an electron beam, allowing the target to be run in frozen spin mode. Adiabatic fast passage spin manipulations can then be used to greatly enhance the population of the <span>(m=0)</span> spin state of the deuteron. Coherent photoproduction of <span>(rho )</span> mesons from deuterium is sensitive to double-scattering at high momentum transfer and in the <span>(m=0)</span> spin state an additional sensitivity at intermediate momentum transfer opens up. We propose a frozen spin target for Hall D and the measurement of <span>(rho )</span> photoproduced coherently from the deuteron as a flagship measurement.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Shape evolution of even-even strontium isotopes near N = 50 shell closure","authors":"Meena Sharma,&nbsp;Manvi Rajput,&nbsp;Suram Singh,&nbsp;Arun Bharti,&nbsp;G. H. Bhat,&nbsp;J. A. Sheikh","doi":"10.1140/epja/s10050-025-01585-7","DOIUrl":"10.1140/epja/s10050-025-01585-7","url":null,"abstract":"<div><p>The structural properties of even-even Sr isotopes near neutron shell closure (N = 50) have been systematically studied by using Triaxial Projected Shell Model (TPSM), revealing significant variations in deformation, collectivity, and quasiparticle dynamics. Band diagram plots reveal the quaiparticle structure of these isotopes. The variation in reduced transition probabilities [B(E2)] reflects the evolution of collectivity with changes in neutron number and angular momentum, demonstrating a gradual decline near the shell closure (N = 50) and a sharp increase at N = 60, indicative of a transition to a more deformed regime. Furthermore, staggering plots and Potential Energy Surface (PES) analysis reveal a systematic shift from <span>(gamma )</span>-soft to <span>(gamma )</span>-rigid nuclear behavior as the isotopes approach the shell closure, underscoring the interplay between deformation parameters and nuclear configurations.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Linear relation between short range correlation and EMC effect of gluons in nuclei","authors":"Wei Wang,&nbsp;Ji Xu,&nbsp;Xing-Hua Yang,&nbsp;Shuai Zhao","doi":"10.1140/epja/s10050-025-01588-4","DOIUrl":"10.1140/epja/s10050-025-01588-4","url":null,"abstract":"<div><p>We explore the EMC effect of gluons through heavy quark production in deep inelastic scattering and the nucleon-nucleon short range correlation (SRC) from sub-threshold photoproduction of the <span>(J/psi )</span>. Applying an effective field theory analysis, we scrutinize the gluon parton distribution functions in nuclear environment and propose a linear relation between the slope of reduced cross section ratio, which reflects the magnitude of gluon EMC effect, and the <span>(J/psi )</span> production cross section at the photon energy <span>(E_gamma = 7.0,text {GeV})</span> in the nucleus rest frame, a characteristic representative of SRC. This finding is supported by a numerical calculation using the available phenomenological results for gluon nuclear parton distribution functions. Examining this linear relation by the forthcoming experimental data on electron–ion collider allows to decipher nuclear effects of gluon distributions and enhance our comprehension of the substructure in bound nuclei.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144108468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Topical issue on short-range correlations and the EMC effect","authors":"O. Hen,&nbsp;D. W. Higinbotham,&nbsp;E. Piazetsky,&nbsp;A. Schmidt","doi":"10.1140/epja/s10050-025-01578-6","DOIUrl":"10.1140/epja/s10050-025-01578-6","url":null,"abstract":"","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Moments of inertia and shape evolution in A (simeq ) 120–130 Xe, Ba and Ce nuclei","authors":"D. Yakhlef,&nbsp;A. Bouldjedri,&nbsp;S. Berbache","doi":"10.1140/epja/s10050-025-01579-5","DOIUrl":"10.1140/epja/s10050-025-01579-5","url":null,"abstract":"<div><p>We introduce a variant of wood’s method to calculate the empirical moments of inertia <span>({mathfrak {I}_1})</span>, <span>({mathfrak {I}_2})</span> and <span>({mathfrak {I}_3})</span> in the framework of the general triaxial rotor model. The present approach is based (only) on the experimental data about the energy of the low-lying levels and no electromagnetic transition data are necessary. We applied this method to the transitional atomic nuclei <span>(^{128{-}134}Ce)</span>, <span>(^{124{-}132}Ba)</span> and <span>(^{122{-}130}Xe)</span>, the results suggested a variety of shapes in these nuclei. In order to make an accurate analysis of these shapes we investigate the structure of the previous nuclei using the staggering, the gamma - ground state band energy differences and microscopic calculations within the HF+BCS theory.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Photodisintegration of 109Ag: problems and new data","authors":"V. V. Varlamov,&nbsp;A. I. Davydov","doi":"10.1140/epja/s10050-025-01586-6","DOIUrl":"10.1140/epja/s10050-025-01586-6","url":null,"abstract":"<div><p>The results of joint analysis of the photonuclear reaction cross sections for ^nat,107,109Ag obtained in experiments carried out with different beams of <i>γ</i>-quanta are presented. The data for total photoneutron reaction cross-section σ (<i>γ</i>, tot) =  σ (<i>γ</i>, 1<i>n</i>) + σ (<i>γ</i>, 2<i>n</i>), as well as for σ (<i>γ</i>, 1<i>n</i>) cross- section were analyzed. It was found that various experimental data obtained for ^natAg and ¹⁰⁷Ag agree with each other in general, but data obtained for total photoneutron reaction ¹⁰⁹Ag(<i>γ</i>, tot) obtained using the beam of Bremsstrahlung contradict with all other data significantly. It was shown that this only unique cross-section of ¹⁰⁹Ag(<i>γ</i>, tot) reaction is not reliable because of large error in absolute normalization. The new cross-section of the reaction ¹⁰⁹Ag(<i>γ</i>, tot) was estimated as the result of its putting into consistency with the data of various experiments under discussion.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Neutron capture measurements for s-process nucleosynthesis","authors":"C. Domingo-Pardo,&nbsp;O. Aberle,&nbsp;V. Alcayne,&nbsp;G. Alpar,&nbsp;M. Al Halabi,&nbsp;S. Amaducci,&nbsp;V. Babiano,&nbsp;M. Bacak,&nbsp;J. Balibrea-Correa,&nbsp;J. Bartolomé,&nbsp;A. P. Bernardes,&nbsp;B. Bernardino Gameiro,&nbsp;E. Berthoumieux,&nbsp;R. Beyer,&nbsp;M. Birch,&nbsp;M. Boromiza,&nbsp;D. Bosnar,&nbsp;B. Brusasco,&nbsp;M. Caamaño,&nbsp;A. Cahuzac,&nbsp;F. Calviño,&nbsp;M. Calviani,&nbsp;D. Cano-Ott,&nbsp;A. Casanovas,&nbsp;D. M. Castelluccio,&nbsp;D. Catlett,&nbsp;F. Cerutti,&nbsp;G. Cescutti,&nbsp;E. Chiaveri,&nbsp;G. Claps,&nbsp;P. Colombetti,&nbsp;N. Colonna,&nbsp;P. Console Camprini,&nbsp;G. Cortés,&nbsp;M. A. Cortés-Giraldo,&nbsp;L. Cosentino,&nbsp;S. Cristallo,&nbsp;A. D’Ottavi,&nbsp;G. de la Fuente Rosales,&nbsp;S. F. Dellmann,&nbsp;M. Diakaki,&nbsp;M. Di Castro,&nbsp;A. Di Chicco,&nbsp;M. Dietz,&nbsp;E. Dupont,&nbsp;I. Durán,&nbsp;Z. Eleme,&nbsp;M. Eslami,&nbsp;S. Fargier,&nbsp;B. Fernández-Domínguez,&nbsp;P. Finocchiaro,&nbsp;W. Flanagan,&nbsp;V. Furman,&nbsp;A. Gandhi,&nbsp;F. García-Infantes,&nbsp;A. Gawlik-Ramiega,&nbsp;G. Gervino,&nbsp;S. Gilardoni,&nbsp;E. González-Romero,&nbsp;S. Goula,&nbsp;E. Griesmayer,&nbsp;C. Guerrero,&nbsp;F. Gunsing,&nbsp;C. Gustavino,&nbsp;J. Heyse,&nbsp;W. Hillman,&nbsp;D. G. Jenkins,&nbsp;E. Jericha,&nbsp;A. Junghans,&nbsp;Y. Kadi,&nbsp;K. Kaperoni,&nbsp;I. Kelly,&nbsp;M. Kokkoris,&nbsp;Y. Kopatch,&nbsp;M. Krtička,&nbsp;N. Kyritsis,&nbsp;C. Lederer-Woods,&nbsp;J. Lerendegui-Marco,&nbsp;A. Manna,&nbsp;T. Martínez,&nbsp;M. Martínez-Cañada,&nbsp;A. Masi,&nbsp;C. Massimi,&nbsp;P. Mastinu,&nbsp;M. Mastromarco,&nbsp;E. A. Maugeri,&nbsp;A. Mazzone,&nbsp;E. Mendoza,&nbsp;A. Mengoni,&nbsp;V. Michalopoulou,&nbsp;P. M. Milazzo,&nbsp;J. Moldenhauer,&nbsp;R. Mucciola,&nbsp;E. Musacchio González,&nbsp;A. Musumarra,&nbsp;A. Negret,&nbsp;E. Odusina,&nbsp;D. Papanikolaou,&nbsp;N. Patronis,&nbsp;J. A. Pavón-Rodríguez,&nbsp;M. G. Pellegriti,&nbsp;P. Pérez-Maroto,&nbsp;A. Pérez de Rada Fiol,&nbsp;G. Perfetto,&nbsp;J. Perkowski,&nbsp;C. Petrone,&nbsp;N. Pieretti,&nbsp;L. Piersanti,&nbsp;E. Pirovano,&nbsp;I. Porras,&nbsp;J. Praena,&nbsp;J. M. Quesada,&nbsp;R. Reifarth,&nbsp;D. Rochman,&nbsp;Y. Romanets,&nbsp;A. Rooney,&nbsp;G. Rovira,&nbsp;C. Rubbia,&nbsp;A. Sánchez-Caballero,&nbsp;R. N. Sahoo,&nbsp;D. Scarpa,&nbsp;P. Schillebeeckx,&nbsp;A. G. Smith,&nbsp;N. V. Sosnin,&nbsp;M. Spelta,&nbsp;M. E. Stamati,&nbsp;K. Stasiak,&nbsp;G. Tagliente,&nbsp;A. Tarifeño-Saldivia,&nbsp;D. Tarrío,&nbsp;P. Torres-Sánchez,&nbsp;S. Tosi,&nbsp;G. Tsiledakis,&nbsp;S. Valenta,&nbsp;P. Vaz,&nbsp;G. Vecchio,&nbsp;D. Vescovi,&nbsp;V. Vlachoudis,&nbsp;R. Vlastou,&nbsp;A. Wallner,&nbsp;C. Weiss,&nbsp;P. J. Woods,&nbsp;T. Wright,&nbsp;R. Wu,&nbsp;P. Žugec,&nbsp;The n_TOF Collaboration","doi":"10.1140/epja/s10050-025-01563-z","DOIUrl":"10.1140/epja/s10050-025-01563-z","url":null,"abstract":"<div><p>This article presents a review about the main CERN n_TOF contributions to the field of neutron-capture experiments of interest for <i>s</i>-process nucleosynthesis studies over the last 25 years, with a special focus on the measurement of radioactive isotopes. A few recent capture experiments on stable isotopes of astrophysical interest are also discussed. Results on <i>s</i>-process branching nuclei are appropriate to illustrate how advances in detection systems and upgrades in the facility have enabled increasingly challenging experiments and, as a consequence, have led to a better understanding and modeling of the <i>s</i>-process mechanism of nucleosynthesis. New endeavors combining radioactive-ion beams from ISOLDE for the production of radioisotopically pure samples for activation experiments at the new NEAR facility at n_TOF are briefly discussed. On the basis of these new exciting results, also current limitations of state-of-the-art TOF and activation techniques will be depicted, thereby showing the pressing need for further upgrades and enhancements on both facilities and detection systems. A brief account of the potential technique based on inverse kinematics for direct neutron-capture measurements is also presented.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-025-01563-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Lifetimes and electromagnetic transition strengths in (^{124})Ba","authors":"K. A. Gladnishki,&nbsp;M. Beckers,&nbsp;A. Dewald,&nbsp;C. Fransen,&nbsp;J. Jolie,&nbsp;A. Blazhev,&nbsp;D. Kocheva,&nbsp;C. Müller-Gatermann,&nbsp;G. Rainovski,&nbsp;K.-O. Zell","doi":"10.1140/epja/s10050-025-01582-w","DOIUrl":"10.1140/epja/s10050-025-01582-w","url":null,"abstract":"<div><p>The lifetimes of the yrast band states from <span>(4^+_1)</span> to <span>(10^+_1)</span> and <span>(11^-_1)</span> in <span>(^{124})</span>Ba were determined from a Recoil Distance Doppler-Shift method measurement conducted at the Institute of Nuclear Physics at the University of Cologne. The evolution of the deduced E2 transition strengths in the yrast band indicates that <span>(^{124})</span>Ba does not conform to expectations for a nucleus near the X(5) critical point symmetry. Instead, this evolution aligns more closely with the IBM-1 description of a transitional nucleus with no particular symmetry.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Charmed hadron production from secondary (overline{p} + p) annihilations in p+A reactions at FAIR","authors":"Tom Reichert,&nbsp;Jan Steinheimer,&nbsp;Marcus Bleicher","doi":"10.1140/epja/s10050-025-01583-9","DOIUrl":"10.1140/epja/s10050-025-01583-9","url":null,"abstract":"<div><p>We present estimates for the production cross sections of charmed states (<span>(Lambda _c, Sigma _c, Xi _c, D, textrm{and}, D_s)</span>) from secondary <span>(overline{B} + B)</span> annihilations in p+A reactions from <span>(E_textrm{lab}=10-30A)</span> GeV. We focus specifically on the newly planned hadron physics program of CBM at FAIR. These estimates for the production of charmed states are based on the achievable number of <span>(overline{B} + B)</span> annihilations and their invariant mass distributions calculated in the UrQMD transport model.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-025-01583-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Clustering in nuclei and hadrons","authors":"Atsushi Hosaka,&nbsp;Yoshiko Kanada-En’yo,&nbsp;Yasuhiro Yamaguchi","doi":"10.1140/epja/s10050-025-01530-8","DOIUrl":"10.1140/epja/s10050-025-01530-8","url":null,"abstract":"<div><p>Clustering phenomena in hadron and nuclear systems are overviewed. Because the energy scales for hadron and nuclear systems are not very much different, we can apply similar ideas and methods for the study of the seemingly different two systems, with the key ingredient, cluster. Once clusters are formed, they develop low lying excitations near the threshold if suitable interaction is available. This is a universal phenomenon which has been known as the threshold-rule. For nuclear systems the most established is the alpha (<span>(alpha )</span>-)cluster which is the nucleus of <span>(^4textrm{He})</span>. How the <span>(alpha )</span>-clusters develop in nuclei of light-medium mass region, typically <span>(^{12}textrm{C})</span> is discussed in a microscopic manner based on the antisymmetrized molecular dynamics. The evidences of such clustering in some static properties of nuclei and scattering phenomena are discussed. Similar clustering phenomena occur for hadrons, where quark clusters are developed in either colored or colorless channels which are considered to play an important role for exotic hadrons of multi-quarks. In particular colorless hadronic clusters can be good constituents to form molecular-like structure near threshold regions.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 5","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-025-01530-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}