The European Physical Journal A最新文献

{"title":"Random files for fission fragment evaporation in TALYS: a total Monte Carlo approach","authors":"P. Karlsson,&nbsp;A. Al-Adili,&nbsp;A. Göök,&nbsp;Z. Gao,&nbsp;S. Pomp,&nbsp;H. Sjöstrand,&nbsp;A. Solders,&nbsp;A. Koning","doi":"10.1140/epja/s10050-024-01451-y","DOIUrl":"10.1140/epja/s10050-024-01451-y","url":null,"abstract":"<div><p>In this study, we have applied the Total Monte Carlo (TMC) methodology in the simulation of the de-excitation process of primary fission fragments (FF) within the TALYS code. Our objective was to develop a method for assessing fission model deficiencies and parameter sensitivities. The input fission fragment data used by TALYS were systematically varied. This was done using the GEF code to generate 10,000 random files by randomizing the 94 model parameters of GEF that influence both fission yields and their energy distributions. The GEF parameters were varied randomly within 3% of the default value, assuming a normal probability distribution. As a result of this parameter variation, significant changes could be identified for several observables, including the multiplicities of <span>(gamma )</span> rays and prompt neutrons, as well as their spectra. Additionally, we investigate the impact of angular momentum distribution on the de-excitation data of both GEF and TALYS. Finally, we present an attempt to construct a best parameter file benchmarked against evaluated nuclear data files.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-024-01451-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844741","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":"Shape phase transition in the Xe and Ba isotope chains with the sextic oscillator potential","authors":"S. Baid,&nbsp;G. Lévai,&nbsp;J. M. Arias","doi":"10.1140/epja/s10050-024-01463-8","DOIUrl":"10.1140/epja/s10050-024-01463-8","url":null,"abstract":"<div><p>Exact analytical solutions for the low-lying eigenfunctions and eigenvalues of the Bohr Hamiltonian using a sextic potential were presented recently in J. Phys. G: Nucl. Part. Phys. 48, 085102 (2021). Here, they are applied to describe even-even Xe and Ba isotopes with mass numbers from A = 124 to 134 and A = 126 to 136, respectively. The aim of this study is to investigate the possible transition in these isotopic chains from deformed <span>(gamma )</span>-independent to spherical shape phases. For this purpose, a detailed analysis of each isotope, including excitation energies and B(E2) transition rates, is presented. Special attention is paid to transitions from the first two excited <span>(0^+)</span> levels to the <span>(2^+_1)</span> and <span>(2^+_2)</span> levels, as these transitions assume different values for vibrating spherical and deformed nuclei, offering insights into possible shape phase transitions. The three parameters of the Hamiltonian have been determined using a weighted least squares fit procedure. This produces the corresponding energy surface for each isotope. This analysis shows that all studied isotopes are deformed, with moderate deformations, except for the heaviest studied isotope in each isotopic chain, which is calculated to be spherical. In addition to energy excitations and B(E2) transitions, other observables such as nuclear radii are also calculated.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826356","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":"Measurement and analysis of the (^{246})Cm and (^{248})Cm neutron capture cross-sections at the EAR2 of the n_TOF facility at CERN","authors":"V. Alcayne,&nbsp;A. Kimura,&nbsp;E. Mendoza,&nbsp;D. Cano-Ott,&nbsp;T. Martínez,&nbsp;O. Aberle,&nbsp;F. Álvarez-Velarde,&nbsp;J. Andrzejewski,&nbsp;L. Audouin,&nbsp;V. Bécares,&nbsp;M. Bacak,&nbsp;M. Barbagallo,&nbsp;F. Bečvář,&nbsp;G. Bellia,&nbsp;E. Berthoumieux,&nbsp;J. Billowes,&nbsp;D. Bosnar,&nbsp;A. Brown,&nbsp;M. Busso,&nbsp;M. Caamaño,&nbsp;L. Caballero-Ontanaya,&nbsp;F. Calviño,&nbsp;M. Calviani,&nbsp;A. Casanovas,&nbsp;F. Cerutti,&nbsp;Y. H. Chen,&nbsp;E. Chiaveri,&nbsp;N. Colonna,&nbsp;G. Cortés,&nbsp;M. A. Cortés-Giraldo,&nbsp;L. Cosentino,&nbsp;S. Cristallo,&nbsp;L. A. Damone,&nbsp;M. Diakaki,&nbsp;M. Dietz,&nbsp;C. Domingo-Pardo,&nbsp;R. Dressler,&nbsp;E. Dupont,&nbsp;I. Durán,&nbsp;Z. Eleme,&nbsp;B. Fernández-Domínguez,&nbsp;A. Ferrari,&nbsp;P. Finocchiaro,&nbsp;V. Furman,&nbsp;K. Göbel,&nbsp;A. Gawlik,&nbsp;S. Gilardoni,&nbsp;T. Glodariu,&nbsp;I. F. Gonçalves,&nbsp;E. González-Romero,&nbsp;C. Guerrero,&nbsp;F. Gunsing,&nbsp;H. Harada,&nbsp;S. Heinitz,&nbsp;J. Heyse,&nbsp;D. G. Jenkins,&nbsp;F. Käppeler,&nbsp;Y. Kadi,&nbsp;T. Katabuchi,&nbsp;N. Kivel,&nbsp;I. Knapova,&nbsp;M. Kokkoris,&nbsp;Y. Kopatch,&nbsp;M. Krtička,&nbsp;D. Kurtulgil,&nbsp;I. Ladarescu,&nbsp;C. Lederer-Woods,&nbsp;J. Lerendegui-Marco,&nbsp;S. Lo Meo,&nbsp;S. J. Lonsdale,&nbsp;D. Macina,&nbsp;A. Manna,&nbsp;A. Masi,&nbsp;C. Massimi,&nbsp;P. Mastinu,&nbsp;M. Mastromarco,&nbsp;F. Matteucci,&nbsp;E. A. Maugeri,&nbsp;A. Mazzone,&nbsp;A. Mengoni,&nbsp;V. Michalopoulou,&nbsp;P. M. Milazzo,&nbsp;F. Mingrone,&nbsp;A. Musumarra,&nbsp;A. Negret,&nbsp;R. Nolte,&nbsp;F. Ogállar,&nbsp;A. Oprea,&nbsp;N. Patronis,&nbsp;A. Pavlik,&nbsp;A. Pérez de Rada,&nbsp;J. Perkowski,&nbsp;L. Persanti,&nbsp;I. Porras,&nbsp;J. Praena,&nbsp;J. M. Quesada,&nbsp;D. Radeck,&nbsp;D. Ramos-Doval,&nbsp;T. Rauscher,&nbsp;R. Reifarth,&nbsp;D. Rochman,&nbsp;M. Sabaté-Gilarte,&nbsp;A. Saxena,&nbsp;P. Schillebeeckx,&nbsp;D. Schumann,&nbsp;S. Simone,&nbsp;A. G. Smith,&nbsp;N. V. Sosnin,&nbsp;A. Stamatopoulos,&nbsp;G. Tagliente,&nbsp;J. L. Tain,&nbsp;T. Talip,&nbsp;A. Tarifeño-Saldivia,&nbsp;L. Tassan-Got,&nbsp;A. Tsinganis,&nbsp;J. Ulrich,&nbsp;S. Urlass,&nbsp;S. Valenta,&nbsp;G. Vannini,&nbsp;V. Variale,&nbsp;P. Vaz,&nbsp;A. Ventura,&nbsp;D. Vescovi,&nbsp;V. Vlachoudis,&nbsp;R. Vlastou,&nbsp;A. Wallner,&nbsp;P. J. Woods,&nbsp;T. Wright,&nbsp;P. Žugec","doi":"10.1140/epja/s10050-024-01453-w","DOIUrl":"10.1140/epja/s10050-024-01453-w","url":null,"abstract":"<div><p>The <span>(^{246})</span>Cm(n,<span>(gamma )</span>) and <span>(^{248})</span>Cm(n,<span>(gamma )</span>) cross-sections have been measured at the Experimental Area 2 (EAR2) of the n_TOF facility at CERN with three C<span>(_6)</span>D<span>(_6)</span> detectors. This measurement is part of a collective effort to improve the capture cross-section data for Minor Actinides (MAs), which are required to estimate the production and transmutation rates of these isotopes in light water reactors and innovative reactor systems. In particular, the neutron capture in <span>(^{246})</span>Cm and <span>(^{248})</span>Cm open the path for the formation of other Cm isotopes and heavier elements such as Bk and Cf and the knowledge of (n,<span>(gamma )</span>) cross-sections of these Cm isotopes plays an important role in the transport, transmutation and storage of the spent nuclear fuel. The reactions <span>(^{246})</span>Cm(n,<span>(gamma )</span>) and <span>(^{248})</span>Cm(n,<span>(gamma )</span>) have been the two first capture measurements analyzed at n_TOF EAR2. Until this experiment and two recent measurements performed at J-PARC, there was only one set of data of the capture cross-sections of <span>(^{246})</span>Cm and <span>(^{248})</span>Cm, that was obtained in 1969 in an underground nuclear explosion experiment. In the measurement at n_TOF a total of 13 resonances of <span>(^{246})</span>Cm between 4 and 400 eV and 5 of <span>(^{248})</span>Cm between 7 and 100 eV have been identified and fitted. The radiative kernels obtained for <span>(^{246})</span>Cm are compatible with JENDL-5, but some of them are not with JENDL-4, which has been adopted by JEFF-3.3 and ENDF/B-VIII.0. The radiative kernels obtained for the first three <span>(^{248})</span>Cm resonances are compatible with JENDL-5, however, the other two are not compatible with any other evaluation and are 20 and 60% larger than JENDL-5.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-024-01453-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798369","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":"Influence of octupole deformed shell structure on the asymmetric fission of mercury isotopes","authors":"Dong-ying Huo,&nbsp;Zheng Wei,&nbsp;Kang Wu,&nbsp;Qiao-yue Jiang,&nbsp;Chao Han,&nbsp;Ze-en Yao,&nbsp;Yu Zhang,&nbsp;Jun-run Wang","doi":"10.1140/epja/s10050-024-01456-7","DOIUrl":"10.1140/epja/s10050-024-01456-7","url":null,"abstract":"<div><p>The fission yields of mercury isotopes were calculated and evaluated by using the improved scission point model. The asymmetric fission of ¹⁸⁰Hg was analyzed within the framework of the scission point model with octupole deformed fragments. The fission mass asymmetry of ¹⁸⁰Hg is attributed to the influence of <i>N</i> = 44, 56 and <i>Z</i> = 34, 46 shell gaps for octupole deformations and the liquid drop model. The evolution of proton and neutron numbers in asymmetric fragments of mercury isotopes is also explained by octupole deformed shell gaps.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798314","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":"Simple approximate model for pion masses","authors":"Ulf J. Lindqwister","doi":"10.1140/epja/s10050-024-01461-w","DOIUrl":"10.1140/epja/s10050-024-01461-w","url":null,"abstract":"<div><p>Closed expressions for the masses of the charged and neutral pions are derived based on a simple approximate model for electrostatic screening when a proton is located adjacent to a neutron. The estimated mass values agree to a few percent of experimentally measured values. The electric dipole moment of the deuteron is also estimated based on the phenomenological toy model used here.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-024-01461-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798327","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":"Examining the fusion excitation functions of reactions induced by 8B on 28Si, 58Ni, 144Sm and 208Pb targets within the CDCC framework","authors":"Simran Rani Bharat,&nbsp;Pardeep Singh","doi":"10.1140/epja/s10050-024-01459-4","DOIUrl":"10.1140/epja/s10050-024-01459-4","url":null,"abstract":"<div><p>Here we aim to examine the fusion dynamics and explore the influence of the proton halo structure on above and below barrier fusion cross sections for reactions induced by ⁸B on ²⁸Si, ⁵⁸Ni, ¹⁴⁴Sm and ²⁰⁸Pb targets. The calculations have been carried out by Continuum discretised coupled channel (CDCC) approach-based computer code FRESCO. It is found that on inclusion of continuum couplings, the total (TF) and complete fusion (CF) calculations are affected insignificantly for light and heavier mass targets with respect to the predictions of Universal fusion function (UFF) curve and without coupling calculations. While a significant variation in both TF and CF has been observed for medium mass target. Further, in present work it has also been noticed that the calculated suppression factor for proton-halo does not follow a systematic trend of other neutron-halo or stable (weakly or tightly bound) projectile.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142790341","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":"The resonance states of (^{8}textrm{Be}) in the microscopic cluster model with the absorbing boundary conditions method","authors":"Yining Gao,&nbsp;Jinhui Chen,&nbsp;Bo Zhou","doi":"10.1140/epja/s10050-024-01460-x","DOIUrl":"10.1140/epja/s10050-024-01460-x","url":null,"abstract":"<div><p>The absorbing boundary conditions method is applied in the microscopic Bloch–Brink cluster model using the generator coordinate method to study the resonance states of <span>(^8textrm{Be})</span>. A complex absorbing potential is introduced into the Hamiltonian, equivalent to the absorbing kernels added to the Hill-Wheeler equation. The <span>(0^{+})</span>, <span>(2^{+})</span>, and <span>(4^{+})</span> states of <span>(^{8}textrm{Be})</span> are analyzed for their corresponding energies and widths. The obtained results are consistent with those of the algebraic version of the resonating group method. This work is helpful in demonstrating the efficiency of the absorbing boundary conditions method for addressing nuclear cluster resonance problems within the framework of the generator coordinate method.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142789358","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":"(gamma )-Ray spectroscopy above the 9(^+) isomeric state in the N = Z nucleus (^{66})As","authors":"Henna Joukainen,&nbsp;Panu Ruotsalainen,&nbsp;Jan Sarén,&nbsp;Praveen C. Srivastava,&nbsp;Deepak Patel,&nbsp;Rauno Julin,&nbsp;Kalle Auranen,&nbsp;Zhuang Ge,&nbsp;Tuomas Grahn,&nbsp;Paul Greenlees,&nbsp;Andres Illana,&nbsp;Henri Jutila,&nbsp;Matti Leino,&nbsp;Jussi Louko,&nbsp;Minna Luoma,&nbsp;Joonas Ojala,&nbsp;Janne Pakarinen,&nbsp;Panu Rahkila,&nbsp;Mikael Sandzelius,&nbsp;Holly Tann,&nbsp;Juha Uusitalo,&nbsp;George L. Zimba","doi":"10.1140/epja/s10050-024-01458-5","DOIUrl":"10.1140/epja/s10050-024-01458-5","url":null,"abstract":"<div><p>Excited states above the <span>(9^+)</span> isomer in the odd-odd N = Z nucleus <span>(^{66})</span>As were studied by employing the <span>(^{40})</span>Ca(<span>(^{28})</span>Si, pn) fusion-evaporation reaction at the Accelerator Laboratory of the University of Jyväskylä, Finland. A key method in this study was the use of conversion electrons emitted in the de-excitation of the isomeric state in <span>(^{66})</span>As as a tag for prompt <span>(gamma )</span> rays. Several new states have been added to the <span>(^{66})</span>As level scheme, which was extended up to a tentative spin of 23<span>(hbar )</span>. The previously reported even-spin yrast band has been reassigned to have odd spin values. The odd-spin states above the <span>(9^+)</span> isomer are compared with shell-model calculations using the jj44b and JUN45 interactions. Additionally, the recoil-<span>(beta )</span> tagging efficiency of the recently developed scintillator detector named Tuike has been determined experimentally for the first time.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-024-01458-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778106","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":"Search for candidate wobbling nuclei in rubidium isotopes","authors":"H. Jia,&nbsp;M. Q. Zhou,&nbsp;L. Mu,&nbsp;H. Zhang,&nbsp;L. Liu,&nbsp;B. Qi","doi":"10.1140/epja/s10050-024-01455-8","DOIUrl":"10.1140/epja/s10050-024-01455-8","url":null,"abstract":"<div><p>The possibility of wobbling mode in the <i>A</i> <span>(approx )</span> 80 mass region is investigated by using the constrained triaxial covariant density functional theory and quantum particle rotor model for rubidium isotopes. Several states with the obvious triaxial deformation and high-<i>j</i> particle configuration are obtained in <span>(^{79,81,83,85})</span>Rb, which are suitable for establishing the wobbling mode. Taking the nucleus <span>(^{81})</span>Rb as an example, the available experimental energy spectrum with the <span>(pi )</span>g<span>(_{9/2})</span> configuration is described well. The decreased energy difference between the partner bands, the enhanced <span>(B(E2)_{out})</span>/<span>(B(E2)_{in})</span> values, the angular momentum components and the azimuthal plots indicate that <span>(^{81})</span>Rb can be transverse wobbling candidate. The present work provides a promising basis for future experimental research on the wobbling mode in the <i>A</i> <span>(approx )</span> 80 mass region.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762003","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":"Erratum to: Studies of the Giant Dipole Resonance in (^{27})Al, (^{40})Ca, (^{56})Fe, (^{58})Ni and (^{208})Pb with high energy-resolution inelastic proton scattering under (0^{circ })","authors":"M. Jingo,&nbsp;E. Z. Buthelezi,&nbsp;J. Carter,&nbsp;G. R. J. Cooper,&nbsp;R. W. Fearick,&nbsp;S. V. Förtsch,&nbsp;C. O. Kureba,&nbsp;A. M. Krumbholz,&nbsp;P. von Neumann-Cosel,&nbsp;R. Neveling,&nbsp;P. Papka,&nbsp;I. Poltoratska,&nbsp;V. Yu. Ponomarev,&nbsp;A. Richter,&nbsp;E. Sideras-Haddad,&nbsp;F. D. Smit,&nbsp;J. A. Swartz,&nbsp;A. Tamii,&nbsp;I. T. Usman","doi":"10.1140/epja/s10050-024-01435-y","DOIUrl":"10.1140/epja/s10050-024-01435-y","url":null,"abstract":"","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757906","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}