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Effect of Surface Barrier on the Sputtering Yield of Tungsten by Hydrogen Isotopes 表面势垒对氢同位素溅射钨产率的影响
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-10-26 DOI: 10.1134/S106377612309011X
V. S. Mikhailov, P. Yu. Babenko, A. P. Shergin, A. N. Zinov’ev
{"title":"Effect of Surface Barrier on the Sputtering Yield of Tungsten by Hydrogen Isotopes","authors":"V. S. Mikhailov,&nbsp;P. Yu. Babenko,&nbsp;A. P. Shergin,&nbsp;A. N. Zinov’ev","doi":"10.1134/S106377612309011X","DOIUrl":"10.1134/S106377612309011X","url":null,"abstract":"<p>The sputtering yields of a tungsten target by hydrogen isotopes in the energy range of bombarding particles from 50 eV to 100 eV, as well as the dependence of the sputtering yields on the angle of incidence of the beam on the target and the energy and angular distributions of sputtered particles are obtained by the code developed by us. The strong influence of the type of surface barrier on the results of calculation of the sputtering yield, as well as on the characteristics of sputtered particles is demonstrated. The results obtained make it possible to more accurately assess the tungsten impurity inflow into the hot plasma zone of tokamak.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 3","pages":"413 - 419"},"PeriodicalIF":1.1,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910857","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
Magnetic Response of Conduction Electrons in Nonmagnetic YB6, LaB6, and YbB6 Hexaborides with Electronic and Structural Instabilities 具有电子和结构不稳定性的非磁性YB6、LaB6和YbB6六硼化物中导电电子的磁响应
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-10-26 DOI: 10.1134/S1063776123090133
N. E. Sluchanko, A. V. Kuznetsov, A. N. Azarevich, A. V. Bogach, N. Yu. Shitsevalova, S. E. Polovets, B. V. Filipov, A. Yu. Tsvetkov, S. Yu. Gavrilkin
{"title":"Magnetic Response of Conduction Electrons in Nonmagnetic YB6, LaB6, and YbB6 Hexaborides with Electronic and Structural Instabilities","authors":"N. E. Sluchanko,&nbsp;A. V. Kuznetsov,&nbsp;A. N. Azarevich,&nbsp;A. V. Bogach,&nbsp;N. Yu. Shitsevalova,&nbsp;S. E. Polovets,&nbsp;B. V. Filipov,&nbsp;A. Yu. Tsvetkov,&nbsp;S. Yu. Gavrilkin","doi":"10.1134/S1063776123090133","DOIUrl":"10.1134/S1063776123090133","url":null,"abstract":"<p>A detailed investigation of contributions to the magnetization of nonmagnetic YB<sub>6</sub>, LaB<sub>6</sub>, and YbB<sub>6</sub> hexaboride single crystals has been performed, and a procedure for their separation has been proposed. It has been shown that a low value of electronic susceptibility χ<sub><i>e</i></sub>(<i>T</i>) in YB<sub>6</sub> and LaB<sub>6</sub> hexaborides seems to be associated with a small effective mass of band carriers, <i>m</i>* ~ 0.5<i>m</i><sub>0</sub>. As a result of this, the Pauli component and Landau diamagnetism cancel each other. It has been found that χ<sub><i>e</i></sub>(<i>T</i>) varies in the intervals <i>T</i> &lt; <i>T</i>* (<i>T</i>* ~ 50  K) and <i>T</i> &gt; 150 K, which are attributed to an order–disorder transition below <i>T</i>* and a carriers-related contribution due to the Jahn–Teller structural instability of the boron frame work.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 3","pages":"350 - 355"},"PeriodicalIF":1.1,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910746","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
Pinning of a Magnetic Flux in Polycrystalline YBa2Cu3O6.92 HTSC during Cooling in a Weak Magnetic Field YBa2Cu3O6.92高温超导多晶在弱磁场中冷却时的磁通钉扎
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-10-26 DOI: 10.1134/S1063776123090157
N. G. Trusevich, S. Yu. Gavrilkin, L. I. Trakhtenberg
{"title":"Pinning of a Magnetic Flux in Polycrystalline YBa2Cu3O6.92 HTSC during Cooling in a Weak Magnetic Field","authors":"N. G. Trusevich,&nbsp;S. Yu. Gavrilkin,&nbsp;L. I. Trakhtenberg","doi":"10.1134/S1063776123090157","DOIUrl":"10.1134/S1063776123090157","url":null,"abstract":"<p>The behavior of fine-grained YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6.92</sub> HTSCs during cooling in a weak magnetic field is investigated. The magnetization of samples, the crystallite sizes is which are comparable with the magnetic field penetration depth, is comprehensively analyzed in the range below the superconducting transition temperature. When the crystallite size is smaller than 0.5 μm, vortices are shown not to be fixed to pinning centers, and the temperature dependence of magnetization is completely determined by the screening of crystallites and the temperature of appearance of intercrystallite superconducting currents.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 3","pages":"356 - 361"},"PeriodicalIF":1.1,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910805","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
Higher-Order Harmonics in Hexagonal Graphene Quantum Dots 六边形石墨烯量子点中的高阶谐波
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-10-26 DOI: 10.1134/S1063776123090121
Kh. V. Sedrakian, A. G. Ghazaryan, B. R. Avchyan, Q. S. Poghosyan, T. M. Markosyan
{"title":"Higher-Order Harmonics in Hexagonal Graphene Quantum Dots","authors":"Kh. V. Sedrakian,&nbsp;A. G. Ghazaryan,&nbsp;B. R. Avchyan,&nbsp;Q. S. Poghosyan,&nbsp;T. M. Markosyan","doi":"10.1134/S1063776123090121","DOIUrl":"10.1134/S1063776123090121","url":null,"abstract":"<p>We have considered the high-order harmonic generation in plane graphene quantum dots of hexagonal shape by the independent quasiparticle approximation-tight binding model. We have investigated how such a nonlinear effect is affected by a strong optical wave field, quantum dot typical band gap and lateral size, and dephasing processes. The equation of motion for the density matrix is solved by performing the time integration with the eight-order Runge–Kutta algorithm. If the optical wave frequency is much less than the quantum dot intrinsic band gap, the main aspects of multiphoton high harmonic emission in quantum dots are revealed. In such case dependence of the cutoff photon energy on the strength of the optical pump wave is almost linear. But when the wave frequency is comparable to the bandgap of the quantum dot, the cutoff photon energy shows saturation behavior with an increase in the wave field strength.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 3","pages":"395 - 403"},"PeriodicalIF":1.1,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910855","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
Planar Defects as a Way to Account for Explicit Anharmonicity in High Temperature Thermodynamic Properties of Silicon 平面缺陷作为硅高温热力学性质显式非调和性的一种解释方法
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-10-26 DOI: 10.1134/S1063776123090091
M. V. Kondrin, Y. B. Lebed, V. V. Brazhkin
{"title":"Planar Defects as a Way to Account for Explicit Anharmonicity in High Temperature Thermodynamic Properties of Silicon","authors":"M. V. Kondrin,&nbsp;Y. B. Lebed,&nbsp;V. V. Brazhkin","doi":"10.1134/S1063776123090091","DOIUrl":"10.1134/S1063776123090091","url":null,"abstract":"<p>Silicon is indispensable in semiconductor industry. Understanding its high-temperature thermodynamic properties is essential both for theory and applications. However, first-principle description of high-temperature thermodynamic properties of silicon (thermal expansion coefficient and specific heat) is still incomplete. Strong deviation of its specific heat at high temperatures from the Dulong–Petit law suggests substantial contribution of anharmonicity effects. We demonstrate, that anharmonicity is mostly due to two transverse phonon modes, propagating in (111) and (100) directions, and can be quantitatively described with formation of the certain type of nanostructured planar defects of the crystal structure. Calculation of these defects' formation energy enabled us to determine their input into the specific heat and thermal expansion coefficient. This contribution turns out to be significantly greater than the one calculated in quasi-harmonic approximation.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 3","pages":"342 - 349"},"PeriodicalIF":1.1,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910745","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
Vortex Dynamics in Superconducting MoN Strip with a Side Cut 带侧切的超导MoN带中的涡旋动力学
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-10-26 DOI: 10.1134/S1063776123090169
S. S. Ustavshchikov, M. Yu. Levichev, I. Yu. Pashen’kin, N. S. Gusev, S. A. Gusev, D. Yu. Vodolazov
{"title":"Vortex Dynamics in Superconducting MoN Strip with a Side Cut","authors":"S. S. Ustavshchikov,&nbsp;M. Yu. Levichev,&nbsp;I. Yu. Pashen’kin,&nbsp;N. S. Gusev,&nbsp;S. A. Gusev,&nbsp;D. Yu. Vodolazov","doi":"10.1134/S1063776123090169","DOIUrl":"10.1134/S1063776123090169","url":null,"abstract":"<p>Transport characteristics of superconducting MoN strips with a single side cut near one of the superconductor edges in zero and weak magnetic fields are studied experimentally and theoretically. The presence of the cut makes it possible to observe regimes with one and several simultaneously moving Abrikosov vortices, the number of which is controlled by the value of the applied current. A change in the number of vortices is accompanied with the emergence of a “kink” on the current–voltage characteristic, which can be clearly distinguished in the dependence of the differential resistance on the current. This makes it possible to find average velocity <span>({bar {v}})</span> of vortices (including a single vortex) and the current/voltage ranges with the known number of moving vortices. The vortex velocity determined in this way for our superconducting strips turns out to be weakly depending on the current and is close to maximal value <span>({{{bar {v}}}_{{max }}})</span> ≈ 3 km/s, for which a superconductor transition to the normal state occurs. The maximal velocity value is comparable with the known values for superconductors of types Nb, NbN as well as, and YBCO, but is several times smaller than for superconductors of types MoSi, NbC, and Pb. The fact that difference in the maximal velocities of vortices is associated with different times of variation of the superconducting order parameter magnitude in different superconducting materials is considered.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 3","pages":"372 - 383"},"PeriodicalIF":1.1,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910748","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: 2
On the Exact Solution for a Luttinger Liquid with Repulsion and a Single Point Impurity 具有排斥和单点杂质的Luttinger液体的精确解
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-10-26 DOI: 10.1134/S1063776123090017
V. V. Afonin, V. Yu. Petrov
{"title":"On the Exact Solution for a Luttinger Liquid with Repulsion and a Single Point Impurity","authors":"V. V. Afonin,&nbsp;V. Yu. Petrov","doi":"10.1134/S1063776123090017","DOIUrl":"10.1134/S1063776123090017","url":null,"abstract":"<p>The expression for the conductance of a 1D channel, which has been obtained using the well-known exact solution, is analyzed. It is shown that in the case of strong electron—electron interaction, the slowest (linear in frequency) asymptotics of the conductance is determined by the behavior of electron—electron interaction in the region of transition from 1D to 3D motion realized near the impurity.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 3","pages":"384 - 394"},"PeriodicalIF":1.1,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910843","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
On the Possibility of Controlling the Second Harmonic Radiation of the Free Electron Laser Using the Second Harmonic of the Undulator Field 利用波动场的二次谐波控制自由电子激光器二次谐波辐射的可能性
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-10-26 DOI: 10.1134/S1063776123090078
K. V. Zhukovsky
{"title":"On the Possibility of Controlling the Second Harmonic Radiation of the Free Electron Laser Using the Second Harmonic of the Undulator Field","authors":"K. V. Zhukovsky","doi":"10.1134/S1063776123090078","DOIUrl":"10.1134/S1063776123090078","url":null,"abstract":"<p>The second harmonic radiation of a single-pass free electron laser (FEL) and its dependence on the second harmonic of the undulator field are investigated. In analysis of properties of materials, the nonlinear generation of the second harmonic as a response to radiation is an important effect. In this context, the second harmonic generation of the radiation source (FEL) is undesirable since it masks the signal being analyzed. Conversely, in other cases, the second harmonic radiation of the FEL can be useful as radiation with a higher frequency. We investigate the possibility of suppression (or, conversely, enhancement) of the FEL second harmonic power depending on the phase and strength of the second harmonic of the FEL undulator field. The proposed approach is independent in principle of the radiation frequency. We consider examples of LCLS and PAL-XFEL in the X-ray range and SPARC and LEUTL in the visible range. The more effective influence of the undulator field harmonic in operation with narrow electron beams is demonstrated.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 3","pages":"271 - 282"},"PeriodicalIF":1.1,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910791","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
Satellites of the Dipole-Forbidden Transitions to the Low-Lying 2S1/2 and 2D3/2,5/2 Excited States of K, Rb, and Cs Atoms in the Spectra of Gas-Phase Mixtures with CF4 含CF4气相混合物光谱中K、Rb和Cs原子向低位2S1/2和2D3/2,5/2激发态的偶极禁止跃迁的卫星
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-10-26 DOI: 10.1134/S1063776123090029
V. A. Alekseev, T. A. Vartanyan, A. S. Pazgalev, P. Yu. Serdobintsev
{"title":"Satellites of the Dipole-Forbidden Transitions to the Low-Lying 2S1/2 and 2D3/2,5/2 Excited States of K, Rb, and Cs Atoms in the Spectra of Gas-Phase Mixtures with CF4","authors":"V. A. Alekseev,&nbsp;T. A. Vartanyan,&nbsp;A. S. Pazgalev,&nbsp;P. Yu. Serdobintsev","doi":"10.1134/S1063776123090029","DOIUrl":"10.1134/S1063776123090029","url":null,"abstract":"<p>The luminescence excitation spectra of the <i>D</i><sub>1</sub> resonance line of atoms K, Rb, and Cs in gas mixtures with CF<sub>4</sub> are found to contain satellite transitions, which correspond to the transition of an atom to the states (<i>n</i> – 1)<i>d</i> <sup>2</sup><i>D</i><sub>3/2,5/2</sub> and (<i>n</i> + 1)<i>s</i> <sup>2</sup><i>S</i><sub>1/2</sub>, where <i>n</i> = 4, 5, and 6 for K, Rb, and Cs, respectively, with the simultaneous excitation of CF<sub>4</sub> molecule vibrations at the IR active mode frequency ν<sub>3</sub> with a quantum energy of 1283 cm<sup>–1</sup>. These satellite transitions are A(<i>ns</i> <sup>2</sup><i>S</i><sub>1/2</sub>) + CF<sub>4</sub>(ν<sub>3</sub> = 0) + <i>h</i>ν → A((<i>n</i> – 1)<i>d</i> <sup>2</sup><i>D</i><sub>3/2,5/2</sub>) + CF<sub>4</sub>(ν<sub>3</sub> = 1) and A(<i>ns</i> <sup>2</sup><i>S</i><sub>1/2</sub>) + CF<sub>4</sub>(ν<sub>3</sub> = 0) + <i>h</i>ν → A((<i>n</i> + 1)<i>s</i> <sup>2</sup><i>S</i><sub>1/2</sub>) + CF<sub>4</sub>(ν<sub>3</sub> = 1), where A = K, Rb, and Cs. The appearance of an optical coupling between the upper and lower states of these asymptotically (at <span>({{R}_{{{text{A}} - {text{C}}{{{text{F}}}_{4}}}}})</span> → ∞) forbidden transitions is shown to be caused by the interaction of the dipole moment of the ν<sub>3</sub> = 1 ↔ ν<sub>3</sub> = 0 vibrational transition in the CF<sub>4</sub> molecule with the dipole moments of the electronic transitions <i>np</i> <sup>2</sup><i>P</i><sub>1/2,3/2</sub> ↔ (<i>n</i> – 1)<i>d</i> <sup>2</sup><i>D</i><sub>3/2,5/2</sub> and <i>np</i> <sup>2</sup><i>P</i><sub>1/2,3/2</sub> ↔ (<i>n</i> + 1)<i>s</i> <sup>2</sup><i>S</i><sub>1/2</sub> in an alkali metal atom; as a result of this interaction, the upper state of the satellite transition acquires admixtures of the A(<i>np</i> <sup>2</sup><i>P</i><sub>1/2,3/2</sub>)CF<sub>4</sub>(ν<sub>3</sub> = 0) resonance states.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 3","pages":"283 - 293"},"PeriodicalIF":1.1,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71910792","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
Magnetostatic Mechanism of Chiral Symmetry Breaking in Multilayer Magnetic Structures 多层磁结构中手性对称破缺的磁静力机制
IF 1.1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2023-10-01 DOI: 10.1134/S1063776123100187
M. A. Kuznetsov, A. A. Fraerman
{"title":"Magnetostatic Mechanism of Chiral Symmetry Breaking in Multilayer Magnetic Structures","authors":"M. A. Kuznetsov, A. A. Fraerman","doi":"10.1134/S1063776123100187","DOIUrl":"https://doi.org/10.1134/S1063776123100187","url":null,"abstract":"","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"3 1","pages":"442 - 452"},"PeriodicalIF":1.1,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139329164","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
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