bluuebunny/crossref_metadata_2025 huggingface dataset:
A NEW DEVELOPMENT IN THE REAL SPACE HIGH RESOLU-TION ELECTRON MICROSCOPE SIMULATION METHOD
Authors: WANG YUAN-MING  , CHEN JIANG-HUA  , HU TIAN-BAO  ,   中国科学院金属研究所固体原子象实验室
Published: November 2020

In a detailed study of the problem of induced numerical artifacts in the Real Space (RS) High Resolution Electron Microscopy (HREM) image simulation, a δ-ε criterion in the RS method for simulating HREM images has been derived. This condition imposes a practical limitation in choosing the sampling interval δ and the slice thickness ε for the RS method. It has been found that when the δ-ε condition is satisfied and a much more accurate formula is used for calculating the propagating factor p(r), the RS method gives results in satisfactory agreement with the conventional FFT multi-slice (FFTMS) method, but saving coputational time and avoiding the computing divergence that may arise in the RS method.
EFFECT OF NONLINEAR GAIN AND WAVEGUIDE STRUCTURE ON THE LINEWIDTH OF SEMICONDUCTOR LASERS
Authors: GUO CHANG-ZHI  , HUANG YONG-ZHEN  ,   北京大学物理系
Published: November 2020

The effect of nonlinear gain and waveguide structure on the modal linewidth broadening produced by with quantum phase noise in semiconductor lasers is inverstigated with semiclassical theory. It is shown that the modal linewidth depends not only on the linear gain but also on the third order nonlinear gain and the waveguide structure. Thus a new linewidth broadening enhancement factor and a new mechanism of the power-independent linewidth component are proposed.
BISTABILITY IN THE INTERACTION OF INTENSE TWO-FREQUENCY LASER WITH PLASMA
Authors: MA JING-XIU  , XU ZHI-ZHAN  ,   (1)中国高等科学技术中心(世界实验室)凝聚态和辐射物理分中心; (2)中国科学院上海光学精密机械研究所
Published: November 2020

This paper presents detailed studies on the bistability exhibited by the Langmuir-wave driven by a two-frequency laser. The equations governing the evolution of the amplitude and phase of the Langmuir-wave are derived fully relativistically. The bistable responses of both the saturated amplitude and steady amplitude of the Langmuirwave with respect to plasma frequency and pump intensity are studied, and the applications of hysteresis to laser-plasma Beat-Wave Accelerator are discussed. Finally the properties of the time evolution of the Langmuir-wave amplitude near the critical poim of the bistability are also investigated.
EVIDENCES FOR CO DISSOCIATION PROMOTED BY ALAKLI ON AG(110)
Authors: WU MING-CHENG  ,   复旦大学表面物理实验室
Published: November 2020

Interactions ot CO with the sodium-precovered Ag(110) have been studied with X-ray photoelcctron spectroscopy (XPS) and ultravilet photoelectron spectroscopy(UPS). It is shown that there are two weakly chemisorbed molecular states on the Na/Ag(110) at low temperature. As the annealing temperature increasing, only one state regains which is associated with the existence of Na. The further experimental evidences show that this state is a necessary precursor to the dissociated state.
THE QUANTUM STATISTICAL PROPERTIES OF THE JAYNES-CUMMINGS MODEL
Authors: GU QIAO  ,   西北大学物理系
Published: November 2020

We derive a set of equations characterizing the quantum statistical properties of Jaynes-Cummings model, which may be used to describe overall the dynamical and statistical aspects in the interaction between a two-level atom and a single mode of the radiation field. Both interactions of a two-level atom with a vacuum field and a excited atom with a coherent field, as examples, are discussed in detail. Finally, the practicality of the above-mentionedi theoretical studies is demonstrated.
A SET OF EXACT GRAVITATIONAL 2-SOLITON SOLUTIONS OF EINSTEIN'S EQUATIONS
Authors: TAO FU-ZHEN  , LI BO  ,   中山大学物理系
Published: November 2020

According to a diagonal metric tensor, a set of exact gravitational soliton solutions of Einstein's equations in vacuum is obtained, which discribe two solitons propagating with constant velocity in opposite directions. After collision, they will continue to propagate without changing their original shape. Firally, the singularity and energy density of these solutions are also discussed.
FAR-INFRARED REFLECTION SPECTRA OF THE HIGH-Tc OXIDE SUPERCONDUCTORS MBa2Cu3O7-δ (M = Y, Sm, Gd, Eu)
Authors: YE HONG-JUAN  , YU ZHI-YI  , LU WEI  , CHEN JIAN-XIANG  , SHEN XUE-CHU  , CAO NING  , ZHENG JIA-QI  , CHEN XI-SHEN  , MIAO BAI-CAI  ,   (1)复旦大学物理系; (2)中国科学院上海技术物理研究所; (3)中国科学院物理研究所
Published: November 2020

The farinfrared reflection spectra of the oxide superconductors MBa2Cu3O7-δ (M = Y, Sm, Gd, Eu) are reported in this paper. The spectra cover the frequency region of 40-360 cm-1, and the temperature varies from 4.2 K to 300 K. All the spectra of this series of oxide superconductors exhibit the same kind of structure: there are five reflection peaks and three inversion structures. The first two peaks at lower frequencies are identified to be associated with the collective vibrations of Ba, Cu, O ions and M, O ions, with B1a symmetry; other three peaks result from the bending vibrations of the Cu-O bonds. The three inversion structures in the spectra may be correlated to the superconducting energy gaps.
STUDY OF THE ELECTRONIC STRUCTURE OF AMORPHOUS Fe80B20-xMx BY MOSSBAUER SPECTROSCOPY
Authors: XU YU-SHENG  , JIANG HUA-LI  , U. GONSER  ,   (1)Fachbereich 12.1,Angewandte Physik,Universitat des Saarlandes,D-6600 Saarbrucken,B. R. D.; (2)苏州大学物理系
Published: November 2020

In order to examine the electronic structure of amorphous Fe80B20-xMx (M = P, C, Si, Ge), the hyperfine field and the isomer shift of these alloys are obtained and analyzed. The number of the electrons transferred from metalloid to the 3d band of Fe is estimated on the basis of the "rigid band-donor" model. It is shown that the 4s electrons of iron take part in the charge transfer process. A possible resolution of the contradiction between the variation of magnetic moment and the counter charge transfer to the "rigid band-donor" model is given.
TWO-WAVELENGTH NEIGHBORHOOD PRINCIPLE OF TWO-PHASE STRUCTURE INVARIANTS
Authors: SUN HONG-LIN  , ZHANG GANG  , GUO DONG-YAO  ,   吉林大学理论化学研究所
Published: November 2020

An approximate result of first neighborhood is given in ref [5] . In consideration of the importance of strict treatment about this problem, a new formula is derived. According to the computational comparision between the two formulas, it can be concluded that the approximate method in ref [5] is very simple, convenitnt and reliable. It is also concluded by adding random errors to the magnitudes of normalized structure factors that Hauptman's conclusion, namely, the two-phase structure invariants are only dependent on chemical composition and independent of the structure factors, is still correct in the two-wavelength case. Considering this fact, we suggest a fast computational method of the two-wavelength struc-ture invariants which may be useful in practical macrostructure crystallography.
A STUDY ON MECHANISM OF DOPPING IN a-Si:H
Authors: DAI GUO-CAI  , ZHANG RUI-QIN  , GUAN DA-REN  , CAI ZHENG-TING  ,   (1)山东大学理论化学研究室; (2)山东大学物理系
Published: November 2020

We have calculated the electronic states and the total energies of a variety of tetrahedrally co-ordinated atomic clusters using the molecular orbital theory CNDO of quantum chemistry. All models in the calculations are based on the cluster Si46 with a single vacancy in the center. We find that for the cluster of Si46H60H4*, in which all dangling bonds are saturated with hydrogen, the donor or acceptor levels in the gap clearly appear when the phosphorus or the boron is introduced substitutionally into the cluster, whereas no clear impurity levels is found for that without hydrogenation. In addition, the increase in total energy resulting from introducing phosphorus (or boron) into the hydrogenated cluster Si46H60H4* is evidently more than that of the cluster without hydrogenation. Our results have been explain d theoretically by the "8-N" rule. The specific role of hydrogen in doping mechanism and some recent experiments are discussed for a-Si:H films.
M?SSBAUER STUDY OF AMORPHOUS Fe-Ni-MET FERROMAGNET
Authors: HUANG ZHI-GAO  , LIN ZHAO-HUA  ,   福建师范大学物理系
Published: November 2020

In this paper, the M?ssbauer spectra of amorphous Fe81-xNixSi3.5B13.5C2 (x = 5, 10, 15, 20, 25, 30, 35) alloys and crystalline Fe50Ni50 are studied at room temperature and under external magnetic field. The hyperfine interaction parameters and hyperfine field distribution curves were obtained with the fitting spectrum method. The results indicated that there are two magnetic states of iron atom and Inver-like characteristic in amorphous Fe-Ni-Met alloys. Anomalous phenomena at about 15 at % Ni in Fe-Ni-Met alloys was revealed. It was suggested chat the conditions of external magnetic field and low temperature have the similar effect on the ordering of magnet. In the sometime, the mechanism of hybridization of the Fe 3d hand with the metalloid valence orbitals and the electron tranfer between transition metals was used to explain the experimental results for the amorphous transition metals (TM)-metalloid (Met) alloys.
GROWTH OF TUNGSTEN BRONZE CRYSTALS
Authors: LI LI-MAN  , WANG GANG  ,   (1)北京钢铁学院; (2)中国科学院物理研究所
Published: November 2020

Some phenomena of tungsten bronze crystals growth were observed carefully. The effects of electrolytic temperature, current and time on the growth of crystals were studied and the optimum conditions for crystal growth were found. KxWO3,NayWO3 and KxNayWO3 crystals were produced successfully by fused salt electrolysis.
DEFECTS IN RUBIDIUM ACID PHTHALATE (RAP) CRYSTALS
Authors: HUANG YI-SEN  , ZHAO QING-LAN  ,   中国科学院福建物质结构研究所
Published: November 2020

Based on the distribution and the morphology of the dislocations and other defects as well as the structural feature, the relationship between the defects and the structure of the rubidium acid phthalate crystal is discussed. In addition, a brief account of the defect formation is also given.
SURFACE PHONON DISPERSIONS ON Cu(100) STUDIED BY THE EMBEDDED ATOM METHOD
Authors: LUO NING-SHENG  , XU WEN-LAN  ,   上海技术物理所红外物理实验室
Published: November 2020

The Embedded Atom Method is applied to study the properties of surface phonons of transition metal Cu. We derive the formula of surface lattice dynamical matrix from the se-miempirical functions. As an example, we calculate the surface phonon dispersions on Cu (100) surface; the calculated Raileigh phonon dispersion curve on Cu(100) along the direction ΓX is compared with that measured by electon-energy-loss-spectroscopy, and satifactory agreement is obtained.
THEORETICAL CALCULATIONS OF HYPERFINE INTERACTIONS OF TRIVACANCY IN SILICON
Authors: FAN XI-QING  , SHEN SAN-GUO  , ZHANG DE-XUAN  , REN SHANG-YUAN  ,   (1)郑州大学物理系; (2)中国科学技术大学物理系
Published: November 2020

The deep energy levels and the wavefunctions of V3- in silicon are calculated by using the Koster-Slater Green's function method. Numerical results show that there are five energy levels in the energy gap, i.e., E(A2)=0.417eV, E(B1)=0.492eV, E(B21)=0.512ev, E(A1)=0.532eV, E(B22)=0.608eV. The hyperfine interactions (h.f.) constant associated with these states are calculated. According to the comparison of the theoretical h.f. constant with the experiments, we determine that the B1-state is occupied by the unpaired electron of V3-. The distributed probability of V3- in B1-state on the nearest neighbour atoms is about 60.2%, the major part of which is centered on the two atoms in the plane determined by the trivacancy.
INVESTIGATION ON THE IONIC CHARACTERISTIC OF CHEMICAL BOND IN COMPOUND SEMICONDUCTOR AND THE EFFECT OF IT ON THE IONIC RANGE PARAMETERS
Authors: WANG DE-NING  , WANG WEI-YUAN  ,   中国科学院上海冶金研究所
Published: November 2020

Based on the molecular-orbital theory, the secular equation of molecule consisted of two different atoms can be deduced. Solving the above equation, the quantitative expression of the characteristic constant N and λ for the linearly combined wave function of the compound and the equation of the bond forming energy or the anti-bond forming energy are obtained. Using the difference between this two energies, the N and λ can be related to the average energy gap Eh arised from the symmetric potential Vcov, the energy gap C arised from the anti-symmetric potential Vion and the total energy gap Eg, hence, the dependence of λ on the fraction of the spectrum ionicity fi and the ratio C/Eh are deduced. From the dependence of λ on fi, the expression connecting fi and the deviation coefficient γ for the electronic stopping power of the compound may be obtained. According to the above equations and considering the structural characteristic of zincblen-de and wartzite structure, the reason which causes the difference of the deviation coefficient γ and the piezoelectric constant epol between the two structures can be well explained. The same turning point can be found in all the three curves expressing the dependence of C/Eh, γ and epol on fi respectively, hence, we could see that the bond and structural property of crystal will be the most essential cause which results in the change of chemical and physical property of semiconductor compound.
FLUORESCENCE ENHANCEMENT OR QUENCHING OF MOLECULE AT SERS ACTIVE SURFACES
Authors: PAN DUO-MAI  , MIAO REN-CAI  , LI XIU-YING  , ZHANG PENG-XIANG  ,   (1)陕西师范大学物理系; (2)中国科学院物理研究所
Published: November 2020

Molecular fluorescence spectra of dye adsorbed on silver colliod and silver mirror were studied. Acriding Orange was used as sample in the experiment. We have found that the enhancement or quenching are depend on the competition of two processes, i.e., local field enhancement and non-radiation energy transfer from the molecule to metal surface. The fluorescence is enhanced when enhanced absorption and enhanced emission conditions are achieved. However, molecular fluorescence is far less enhanced then Raman. Theoretical calculation shows that peak enhencement of fluorescence intensity will be 10-102. It agrees with the experimental value for Acriding Orenge adsorbed on silver mirror.
SEMI-PLANE-SYMMETRIC GENERAL SOLUTION GENERATED BY SEMI-PLANE-SYMMETRIC NON-NULL ELECTROMAGNETIC FIELDS
Authors: LI JIAN-ZENG  , LIANG CAN-BIN  ,   (1)北京广播学院工程基础部; (2)北京师范大学物理系
Published: November 2020

The semi-plane-symmetric static general solution generated by semi-plane-symmetric non-null electromagnetic fields is obtained. We prove that there are only three Killing vector fields ?/?x, ?/?y and ?/?t in this kind of space-times. The space-time singularity is also investigated. It is shown that all these space-times are geodesically incomplete, and all incomplete geodesies correspond to scalar polynomial curvature singularities.
INDEXING OF ELECTRON DIFFRACTION PATTERN OF ICOSAHEDRAL PHASE IN Al-Mn ALLOY
Authors: BIAN WEI-MIN  ,   东北工学院
Published: November 2020

According to the model of regular dodecahedron and combining geometric projection with crystal diffraction, electron diffraction patterns, of icosahedral phase in Al-Mn alloy with twofold, threefold and fivefold axes have been indexed using three dimension indexes. Some significant primary results have been obtained.
THE ALGEBRAS OF MEROMORPHIC VECTOR FIELDS AND THE BASES OF MEROMORPHIC λ-DIFFERENTIALS ON RIEMANN SURFACES (Ⅱ)
Authors: WANG SHI-KUN  , SHEN JIAN-MIN  , GUO HAN-YING  ,   (1)中国科学院理论物理研究所,北京,100080; (2)中国科学院应用数学研究所,北京,100080
Published: November 2020

The algebras of meromorphic vector fields and the bases of meromorphic λ-differentials with multipoles are constructed explicitly on general genus Riemann surfaces. For Riemann sphere the central extension of the algebra is also given.
"CORE RING-RATIO" METHOD FOR SURFACE ROUGHNESS MEASUREMENT WITH INCOHERENT LIGHT SOURCE
Authors: CHENG LU  , SIU GUEI-GU  ,   (1)南开大学物理系,天津,300071; (2)香港城市理工学院应用科学系
Published: November 2020

This work extends the "Core-Ring-Ratio" method for surface roughness mea-surement[1-5] from the case using coherent light source to the case using incoherent source (i. e., extended non-monochromatic light source). The formulas of the principle of measurement and the schematic diagram of the measuring device are presented.
THE APPLICATION OF ∑ RELATIONSHIP LINEAR THEORY (Ⅲ)——ON ESTIMATING ±π/2 TYPE OF PHASE
Authors: LIU YONG-SHENG  , HU NING-HAI  , JIN ZHONG-SHENG  ,   中国科学院长春应用化学研究所,长春,130022
Published: November 2020

We discuss the fundamental principle and application of estimating ±π/2 type of phase using ∑ relationship in noncentrosymmetrical crystal structures. We obtain an optimum coincident principle between specifying the origin of unit cell, enantiom-orph and estimating ±π/2 type of phase. A group of phases of this type is estimated by ∑7,∑3 relationships for two known crystal structures in terms of the above mentioned principle. The results are satisfactory.
A METHOD FOR OBTAINING THE DISPERSION RELATION OF THE REFRACTIVE INDEX NEAR THE BAND-GAP OF GaAs/GaAlAs MULTIPLE QUANTUM WELLS MATERIALS
Authors: XIE YUAN-LIN  , CHEN ZHENG-HAO  , ZHOU YUE-LIANG  , YANG GUO-ZHEN  , GU SHI-JIE  ,   (1)中国高等科学技术中心(世界实验室); (2)中国科学院物理研究所,北京,100080
Published: November 2020

This paper presents a method for obtaining the dispersion relation of the refractive index near the direct band-gap of GaAs/GaAlAs multiple quantum wells (MQW) materials. Its characteristic is introducing room temperature excitonic oscillating factors into the dielectric coefficients on the basis of dealing MQW with optical transmit matrixes on the system of multi-layer media films, then to fit the curve of experimental reflection spectrum of the sample. This dispersion relation is very important to the design of optoelectronic elements and their theoretical expectations. By this way, we can obtain not only the dispersion relation of the real and imaginary part of the refractive index, but also the resonant excitonic absorption spectrum.
OBSERVATION AND MEASUREMENT OF THE AUTOIO-NIZATION SPECTRA FOR 4f76s(7S)np SERIES OF Eu
Authors: HU SU-FEN  , ZHANG SEN  , CHEN XING  ,   浙江大学物理系,杭州310027
Published: November 2020

The autoionization spectra of Eu have been observed by using three-step laser excitation method. Seventy five energy levels of Eu which are located in the 45740.3-47341.0cm-1 energy interval with even parity have been measured. The 4f76s(7S)np (n=12-46) 6PJ autoionization Rydberg series converging to the 7S3 level of the configuration 4f76s in Eu II have been identified. The energy levels and quantum defects for this series in above energy interval are reported.
SYNTHESIS AND PHYSICAL PROPERTIES OF INTERCALA-TION COMPOUND LiVO2
Authors: WANG GANG  , LIU ZAI-HAI  , GAO JING-ZHI  , ZHANG WEN-BIN  ,   (1)北京师范学院,北京,100037; (2)首都钢铁公司职工大学,北京,100041; (3)中国科学院物理研究所,北京,100080
Published: November 2020

The intercalation compound LiVO2 is synthesized successfully by use of solid reaction method. The experiments for composition proponion, X-ray powder diffraction and quantitative element analysis are made. Finally, the experimental results are discussed.
MAGNETIC AND ELECTRICAL PROPERTIES OF AMORPHOUS Fe86M4Zr10 ALLOYS
Authors: LI ZHI-QIANG  , CHEN JIN-CHANG  , ZHAO JIAN-GAO  , SHEN BAO-GEN  , LI DE-XIU  ,   (1)北京师范学院物理系,北京,100037; (2)云南大学物理系,昆明,650091; (3)中国科学院物理研究所,北京,100080
Published: November 2020

The magnetic and electrical properties of amorphous Fe86M4Zr10 (M = V, Cr, Mn, Fe, Co, Ni, Cu, B, Si) alloys are studied. Effects of M on the average magnetic moment and Curie temperature of these alloys are discussed. Electrical resistivity minimum in the vicinity of Tc is attributed to the coherent exchange scattering.
CALCULATION FOR g-VALUES OF THE AMORPHOUS Si AND AMORPHOUS Si-BASED ALLOY SEMICONDUCTORS
Authors: YU GONG  , CHEN GUANG-HUA  , SU YU-CHENG  , ZHANG FANG-QING  ,   兰州大学物理系电子材料研究所,兰州730001
Published: November 2020

In this paper, the g-values of the ESR signals in amorphous Si and Si-based alloys have been calculated by using the improved CNDO/2 molecular orbital method. The effects of the structural relaxation on the g-valucs have been also discussed. The calculated results are in accord with the experiments.
STUDY OF A QUANTUM TRANSVERSE ISING MODEL WITH RANDOM FIELDS
Authors: MA YU-QIANG  , LI ZHEN-YA  ,   苏州大学物理系,苏州215006
Published: November 2020

In this paper, we propose a new method, which combines the pair approximation with the discretized path-integral representation, to study the quantum transverse Ising model with random-field. Full phase diagrams are obtained for various random-field distributions. When applied random fields are trimodal (and bimodal), the critical properties including the possibility of the existence of the tricritical points and rcentrance phenomena are numerically analyzed in detail. In the limit z→∞, the extended mean-field result is recovered.
STRIPE DOMAIN LATTICE FMR IN GARNET THIN FILMS
Authors: BI SI-YUN  ,   山东大学物理系,济南,250100
Published: November 2020

Dependence of the stripe domain lattice FMR on the orientation of the microwave exciting magnetic field is reported in detail. The present experimental results show that the Smit-Beljers' theory on domain lattice FMR is not perfect and needs to be improved further
THE REFLECTION OF H+, D+ AND T+ FROM SURFACE OF SOLIDS
Authors: LUO ZHENG-MING  ,   四川大学原子核科学技术研究所,成都610064
Published: November 2020

In the present paper, the reflection coefficients of H+, D+ and T+ of various energies from surface of solids have been calculated by means of the recently-developed bipartition theory of light ion transport. A comparison of the results with relevant experiments and the Monte-Carlo results shows a good agreement. These results also show that the bipartition theory of light ion transport is an effective theoretical method for investigation of ion reflection from surface of solids.
DENSITY OPERATOR FORMALISM FOR SPIN SYSTEMS WITH PERMUTATION SYMMETRY IN MULTIPLE PULSE AND 2D NMR EXPERIMENTS (Ⅱ)——MULTIPLE QUANTUM PRODUCT OPERATOR FORMALISM
Authors: LIU AI-ZHUO  , PEI FENG-KUI  ,   中国科学院长春应用化学研究所,长春,130022
Published: November 2020

Based on the Symmetry-Adapted Product Operator (SPO), the Moltiple Quantum Coherence Product Operator (MQCPO) formalism is introduced in this paper. The modified density operator theory is universal for the description of modern multiple pulse and two-dimensional NMR experiments performed on InS(I = 1/2, 5 = 1/2; n = an arbitray integer number) spin systems. In fact, MQCPO is a Hermitian combination of irredusible tensor operators for a compsite particle, and reveals symmetry properties of the spin system in a different aspect from SAPO. There exist simple linear relations between MQCPO and SAPO for In(I = 1/2, n = 2,3) spin systems, the SAPO forms of MQCPO are listed as a usual example. MQCPO shows a simple cyclic commutation relationship with the free procession Hamiltonian, but not with the Hamiltonian of a pulse effect. Therefore, MQCPO is convenient for description of evolution period. Using the linear relations between MQCPO and SAPO, as well as the permutation properties for the coordinate indices of Cartesian components in a SAPO, the description of a pulse action tarns out to be easy and direct under the "z"-representation. Analyses of the pulse sequences for heteronuclear spectra editing and spin topology filtration have shown the power of this formalism.
THE EFFECTIVE FLUX PINNING FORCE OF SUPERCONDUCTING CERAMIC YBaCuO
Authors: DING SHI-YING  , YAN JIA-LIE  , YU ZHENG  , TONG HONG-WU  , SHI KE-XING  , QIU LI  ,   南京大学物理系,南京,210008
Published: November 2020

Based on the concept of effective flux pinning force proposed by the present authors, a method desoribing hysteresis of superconducting ceramic samples with great number of interfaces has been established. The dependences of residual magnetization on magnetizing field and temperature were measured and the effective flux pinning force was extracted from the magnetizations according to the method mentioned above. The force consisted of two types, one of which results from interface magnetic currents which conduct the force to crystal lattice directly, and governed by weak links if there are. The other arises from the flux pinning of intragrain pinning centres. The former is important in small fields whereas the later is dominant in high fields.
VARYING TEMPERATURE RAMAN SCATTERING STUDIES OF 12 mol% Ce TETRAGONAL ZIRCONIA POLYCRYSTAL
Authors: CHENG GUANG-XU  , ZHANG XING-KUI  ,   南京大学现代分析中心及固体微结构实验室,南京,210008
Published: November 2020

Raman scattering studies have been carried out on 12 mol% Ce-Tetragonal Zirconia Poly-crystal over 50-800cm-1, and a range of temperature 17-505K, a phase transition was observed from the tetragonal-like to monoclinic-like phase at approximately 165±1K when the temperature was lowering. The reverse transition occurred at approximately 450±2K when the temperature was raising.In order to study the reason of this transition, the condensation of the phonons in Brillouin zone and possible phase transition have been carefully discussed.
A FAMILY OF SEMI-PLANE-SYMMETRIC ELECTROVACUUM SPACETIMES
Authors: LI JIAN-ZENG  , LIANG CAN-BIN  ,   (1)北京广播学院,北京,100024; (2)北京师范大学,北京,100875
Published: November 2020

It is shown in this paper that the electromagnetic field yielding a semi-plane-symnmetric metric can be either plane-symmetric or semi-plane-symmetric. If it is plane-symmetric, then it must be a non-null electromagnetic field, while if it is semi-plane-symmetric, then it can be either null or non-null. The general solution of semi-plane-symmetric spacetimes yielded by semi-plane-symmetric sourceless null electromagnetic field is also given in this paper.
AN EXAFS STUDY OF THE STRUCTURAL MORPHOLOGY OF Ni IN SYNTHETIC DIAMOND
Authors: LI CHEN-XI  , LU KUN-QUAN  , ZHAO YA-QIN  , SHEN ZHU-TONG  ,   (1)冶金部钢铁研究总院,北京,100081; (2)中国科学院物理研究所,北京,100080
Published: November 2020

The structral morphology of metal catalyst Ni in the synthetic diamond was measured by using the fluorecence EXAFS technique. The nickle impurities found exist as fee structure, which is similar to the pure metal Ni. The results obtained from the amount of C atoms coordinated surround Ni and the dilation of Ni-Ni distance show about 9 at-% carbon in the metal Ni matrix which is much more than the limit of earbon solubility 2.7 at-% in metal Ni at normal pressure. The coordination number of Ni in diamond found is less than that in pure metal. This shows that the nickle in the diamond distributes as small particles with dimension about 20?.
VECTOR SCATTERING THEORY AND EXPERIMENTS FOR MULTILAYER OPTICAL COATINGS
Authors: ZHAN YUAN-LING  , WANG LI  ,   (1)南开大学物理系,天津,300071; (2)南开大学物理系,天津,300071,北京工业大学应用物理系
Published: November 2020

A new method is presented for predicting the distribution of vector scattered fields of multilayer optical coatings. The scattering properties of film stacks with various interface cross-correlation models are discussed according to the statistical principles. The theory has been related to the familiar concepts of thin film optics, and simple results are obtained. It is shown theoretically that even though the optical parameters of the multilayer optical coatings are the same, the scattering losses can be quite different due to the different interface cross-correlations. Measurements of the scattered field distribution of optical films have also been made, and from them the interface cross-correlations of the multilayer optical films are determined according to the vector scattering theory.
WHISTLER INSTABILITY WITH WEAKLY RELATIVISTIC TRAPPED ELECTRONS
Authors: BIAN BO-DA  , LIN JING  , GUO SHI-CHONG  , CAI SHI-DONG  ,   (1)福州大学物理系,福州,350002; (2)中国科学院物理研究所,北京,100080,中国高等科学技术中心(世界实验室)
Published: November 2020

The effects of weakly felativistic trapped electrons on whistler instability in the magnetic-mirror configuration are studied. Using the simplified box model(1) the eigen equation is solved with perturbative approach including the weakly relativistic trapped effects. It is found that whistler instability can be driven by the anisotropic hot electrons, while relativisity increases the threshold value of instability and descreases the growth rate as well as makes the unstable modes shifting to low frequency.
ELECTRON DIFFRACTION STUDY OF THE ONE DIMENSIONAL INCOMMENSURATE MODULATED STRUCTURE IN ANKANGITE
Authors: WU XIAO-JING  , LI FANG-HUA  , MA ZHE-SHENG  , SHI NI-CHENG  ,   (1)中国地质大学,北京,100083; (2)中国高等科学技术中心(世界实验室); (3)中国科学院物理研究所,北京,100080,中国科学院北京电子显微镜实验室,北京,100080
Published: November 2020

The one-dimensional incommensurate modulated structure of ankangite (Ba0.827(Ti5.827V2.294Cr0.053)O16), a mineral recently discovered in China, has been studied by electron diffraction. Its average structure belongs to tetragonal system and unit cell parameters of the average structure are a= 10.2?, c=2.96?. The modulated wave spreading along direction c has the wave length of λ = 2.30c. The features of electron diffraction patterns are analysed in detail. The possible mechanism of the incommensurate modulated structure in ankangite is discussed and a modulated structure model of vacancy-displacive type is proposed. The disorder structure caused by the difference among initial phases for displacement functions from place to place is discussed.
SELF-CONSISTENT SEMI-CLASSICAL APPROACH FOR ANALYSING THE TEMPERATURE EFFECT ON NUCLEON MEAN FREE PATH
Authors: SHI JIAN-QING  , LI GUO-QIANG  , GAO QIN  ,   杭州大学物理系,杭州,310028
Published: November 2020

The effect of temperature on the nucleon mean free path is analysed by utilizing the nac-leon density ρq, determined by self-consistent semi-classical approach and the optical potential obtained in local density approximation
MOLECULAR DYNAMICS SIMULATIONS OF SUPERCOOLED LITHIUM CHLORIDE GLASS
Authors: SHAO JUN  , SHU GUANG-YU  , XU HUA  , CHENG ZHAO-NIAN  , CHEN NIAN-YI  ,   (1)上海科学技术大学,上海,201800; (2)苏州师范专科学校,苏州; (3)中国科学院上海冶金研究所,上海,200050
Published: November 2020

Using the Tosi-Fumi pair potential, we have performed simulations of the cooling of molten salt, lithium chloride, at the rate about 5×1012 Ks-1 to study the glass transition and the structural and dynamic properties of the simulated supercooled liquid. It can be seen from our calculation that over the range from 498K to 298K, the peak of the radial distribution function is split into two subpeaks, the self-diffusion cofficient decrease rapidly and the distribution of bond angle has a high peak. So the simulated glass transition temperature should occur ac this range. At 298K the first coordination number of Li+ or Cl- calculated from the cumulative coordination number curve N(r) is about 4. The simulation indicates the existence of microscopic holes in melt and glass. The relationship between the temperature and the number of holes is discussed.
NONLINEAR DYNAMICS OF ONE-DIMENSIONAL CRYSTALLINE BEAM (Ⅲ)
Authors: SHAO MING-ZHU  , I. HOFMANN  , LUO SHI-YU  ,   重庆交通学院,重庆,630073,西南师范大学,重庆,630715
Published: November 2020

In the linear approximation the effects of periodic cooling and electron screening have been discussed, the equation of motion for ions has been reduced to the well-know Mathieus equation. Stability of the system and dynamical behaviour of cross over resonances by ions have been discussed also. Taking ESR at GS1 in FRG as example, the characteristic time for cross over resonances and the cooling time for the beam have been derived.
FIRST PRINCIPLE STUDY OF OPTICAL-PHONON DEFORMA-TION POTENTIALS ON Λ-AXIS FOR GaAs AND AlAs
Authors: WANG REN-ZHI  , HUANG MEI-CHUN  ,   (1)厦门大学物理系,厦门,361005; (2)中国高等科学技术中心(世界实验室)理论物理分中心
Published: November 2020

Ab initio calculations of optical-phonon deformation potentials (ODP)d30, d10 (val) and d10 (cond) on Λ-axis in Brillioun zone for the compounds GaAs and AlAs are reported. The study is based on a frozenphonon model and using the LMTO-ASA method with a frozen-potential approximation, in which the displacement of the empty sphere was considered +o match its atomic sphere partners. The validity of our method and results have been verified with the aid of calculations for wave-vector dependence of the ODPs on Λ-asix, the numerical test to the expressions about d0 VS d30 and d10 VS d10 (val) near Γ point and an extensive comprison with various calculations as well as the experiment.
TIME DEPENDENT M?SSBAUER SPECTROSCOPY AND 119mTe IMPLANTED GaAs
Authors: MO DANG  , ZHANG GUI-LIN  , L. NIESEN  , H. DE WAARD  ,   (1)荷兰Groningen大学物理研究室; (2)中国科学院上海原子核研究所,上海,201849; (3)中山大学物理系,广州,510275
Published: November 2020

A new type of M?ssbauer spectroscopy-time-dependent M?ssbauer spectroscopy isproposed and realized on the basis of using two-step decay 119mTe→119Sb→119Sn.For the GaAs samples, implanted with dose of 110keV 119mTe + 1015 stable Te/cm2 and annealed at 600℃, the relative intensities of various lines of the M?ssbauer spectra have been measured as functions of ξ, a parameter being equal to ΦTe/ΦTo+a1 by definition ξ itself is determined from the annealing time ta, the initial time ti and the final time tf of the measurement of each spectrum. This kind of time-dependent M?ssbauer spectroscopy can be used to investigate the change of the environment of the probe atoms in solid. The lines of M?ssbauer spectra have been identified. The problem of the environment change of Te atom in GaAs after its decay into Sb and the mechanism of the non-substitutional Te have been discussed. Our experimental results are also compared with previous data taken from M?ssbauer spectra of 125Te and 129Te in GaAs.
LINEAR STARK EFFECT OF THE n′dnl AUTOIONIZATION STATES OF Ca AND Sr ATOMS IN THE LOW-FIELD REGION
Authors: ZHANG SEN  , QIU JI-ZHEN  , MEI SHI-MIN  , CHEN XING  ,   浙江大学物理系,杭州,310027
Published: November 2020

The electric field effect on the 3dnl and 4dnl doubly excited autoionization states of Ca and Sr atoms have been observed using a multisiep laser excitation technique. The Stark spectra show that splittings of the Stark levels are linearly dependent on the applied electric field in the lowfield region of F5. We have observed also that the autoionization resonance broadens with increasing electric field because of field-induced mixing of nearly degenerate 1 substates, which can play important role for increase of dielectronic recombination rate in plasmas.
EXACT INTERIOR SOLUTION FOR A STATIC CHAGED SPHERE IN THE HIGHER DIMENSIONAL SPACE TIME
Authors: SHEN YOU-GEN  ,   中国科学院上海天文台,上海,200030,中国科学院理论物理研究所,北京,100080
Published: November 2020

In the higher-dimensional space-time, the metric coefficients g00 and g11 of both the Schwarzschild and Reissner-Nordstr?m metrics satify the relation g00g11 =-1. Byconsidering that rhe relation between the metric coefficients is valid inside a chargedperfect-fluid distribution, and assuming the mass density σ=σ0rbe-λ(r)/2, weobtain an exact interior solution far a static charged sphere in the higher-dimensional space-time.
THE PARABOLA APPROXIMATION TO THE BIFURCATION THEORY
Authors: TAN WEI-HAN  , LIU REN-HONG  ,   中国科学院上海光学精密机械研究所,上海,201800
Published: November 2020

In this article, we propose a parabola approximation to the theory of bifurcation. From that the process of instability to bifurcation, the effect of stubilization after bifurcation, the limit to wards chaos can be made dear and the Feigenbaum number can be caluclated.
A THEORETICAL MODEL OF VIBRATIONAL PREDISSOCIA-TION VIA INTERMEDIATE STATE COUPLING
Authors: XIANG TIAN-XIANG  ,   南京大学化学系化学物理实验室,南京,210008
Published: November 2020

In this paper, a theoretical model for vibrational predissociation (VP) of molecular clusters via intermediate states is proposed. It is shown that molecular intermediate states play an important role in inducing VP processes of molecular clusters. Based on this theory, a statistical dynamics model is established to describe and interpret qualitatively and semiquantatively the experimental line-broadening effects in various molecular clusters. Finally, we discuss the effects of a variety of coupling mechanisms on the energetic structures and the state relaxation processes in molecular clusters.
WEAK COUPLING METHOD FOR TREATING THE SCATTE-RING OF ELECTRONS BY COULOMB POTENTIAL IN WEAK LASER FIELD
Authors: LI JIE-PING  ,   北京师范大学低能核物理研究所,北京,100875
Published: November 2020

In a cicularly polarized radiation field (dipole approximation), for electrons scattered by Coulomb potential, the Schr?dinger equation is handled by using a unitary transformation and a dressed potential. When the dressed potential is expanded into a proper form, the equations for the radial wave function are separated by Floquet partial expansion and they are integrable in weak coupling approximation. Therefore, the approximate wave function, S-matrix and the cross section can be expressed analytically. The comparison to the numerical iterated solution is discussed.
LONG RANGE CORRELATIONS FOR MICROSCOPIC STOCHA-STIC DYNAMICS IN A NONEQUILIBRIUM STEADY STATE (Ⅰ)——CONSTRUCTION OF THE THEORY OF FLUCTUATING HYDRODYNAMICS IN TERMS OF A STOCHASTIC LATTICE GAS MODEL
Authors: LI FU-BIN  ,   淮北煤炭师范学院物理系,安徽,淮北,235000
Published: November 2020

We consider a system with a single locally conservative field in a slab geometry with different densities maintained at the two surfaces of the slab. On the basis of flutuating hydro-dynamics, we show that the static-density correlations are long ranged and decay as - l/│x-y│d-2 for dimension d≥3 over distances small compared to the size of the slab.
THE THEOREM OF MINIMUM ENTROPY PRODUCTION AND PASSIVE OPTICAL CAVITIES
Authors: OU FA  ,   华南理工大学物理系,广州,510641
Published: November 2020

This paper, based on the formulation of the entropy production of mixed optical bistable systems (OBS)[5] is devoted to the demonstration of the theorem of minimum enropy production.
ELECTRONIC STRUCTURE OF CHALCOGEN COMPOUNDS CdSe, CdTe AND SnSe
Authors: DUAN WEN-HUI  , GU BING-LIN  , ZHU JIA-LIN  ,   清华大学物理系,北京,100084
Published: November 2020

The electronic structure of CdSe, CdTe and SnSe are studied using the first-principle scalar-relativistic LMTO-ASA method in the local-density approximation. In the calculation, extra "empty" spheres are introduced on high-symmetry interstitial sites in zinc-blende crystal structure and NaCl crystal structure, and a correction for the leading non-spherical component of the crystal potential is incorporated. The calculated results are compared with the experiment and other non-self consistent calculation.
M?SSBAUER STUDY OF MAGNETIC ORDERING IN YBa2Cu3O7-δ
Authors: DU YOU-WEI  , QIU ZI-QIANG  , TANG HUAN  , J. C. WALKER  ,   (1)The Johns Hopkins University,Baltimore,MD 21218 U. S. A.; (2)南京大学固体物理研究所,南京,210008
Published: November 2020

The relation between magnetic ordering and superconductivity of YBa2Cu3O7-δ was studied by M?ssbauer effect with 57Fe as probe in Cu lattice. The experimental results can be under-stood qualitatively by non-phonon superconductivity mechanism.
THE ALGEBRAS OF MEROMORPHIC VECTOR FIELDS AND ITS REALIZATION ON THE SPACES OF MEROMORPHIC λ-DIFFERENTIALS ON RIEMANN SURFACES (Ⅰ)
Authors: WANG SHI-KUN  , SHEN JIAN-MIN  , GUO HAN-YING  ,   (1)中国高等科学技术中心(世界实验室); (2)中国科学院理论物理研究所,北京,100080; (3)中国科学院应用数学研究所,北京,100080
Published: November 2020

The algebra of meromorphic vector fields with multi-poles on Riemann sphere and the central extension of the algebra are constructed explicitly. Some properties of meromorphic λ- differentials, in particular, of the third kind differentials are investigated.
THE NONCLASSICAL NATURE AND INDEPENDENCE OF HIGHER-ORDER SQUEEZING OF LIGHT FIELD
Authors: XIA YUN-JIE  , GUO GUANG-CAN  ,   (1)曲阜师范大学物理系,曲阜,273165; (2)中国科学技术大学物理系,合肥,230026
Published: November 2020

In this paper, the higher-order squeezing of a single mode light field state ｜ψ>=α｜0>+β｜m>(m>2) is studied. When m is even integral,we find that it exhibits arbitary higher-order squeezing except second order squeezing. But the higher-order squeezing and antibunchinf; do not appear simultaneously- Thus, we come to a conclusion that higher-order squeezing is a new nonclassicl effect of light field which is independent of second order squeezing and antibunching.
THEORY OF TWO-DIMENSIONAL FERMI LIQUIDS (Ⅰ)
Authors: CUI SHI-MIN  , CAI JIAN-HUA  ,   (1)上海交通大学凝聚态物理研究所,上海,200030; (2)中国高等科学技术中心(世界实验室)理论物理分中心
Published: November 2020

It is shown that Landau's mean field theory of Fermi liquids is valid in two-dimensional case through evaluation of the quasiparticle life-time of a 2-D interacting Fermi systems at low density as well as the spin fluctuation of 2-D itinerant Fermi systems.
EFFECT OF THE MODAL INTERACTION ON THE SPECTRAL LINEWIDTH IN THE NEARLY SINGLE MODE SEMICONDUCTOR LASERS
Authors: GUO CHANG-ZHI  , HUANG YONG-ZHEN  ,   北京大学物理系,北京,100871
Published: November 2020

A statistical numerical simulation method is proposed, and by which the accumulation of phase fluctuation and the spectral linewidth in semiconductor lasers are investigated theoretically. In the case of single mode, the result is quite in agreement with that by small signal approximation instead of being its 4 times. In the case of nearly single mode, the linewidth of the main mode is increased somewhat but not too seriously by the side mode. The overestimation and its cause of the results obtained by a Monte Carlo method used by other author recently is noted, and a power independent linewidth component of the side mode of the order of 100 MHz agreed with experiment is obtained where the small signal approximation is not applicable.
EFFECT OF ELECTRON INTERACTION ON THE BANDWIDTH OF CONDUCTIVE POLYMERS
Authors: FU ROU-LI  , SHUAI ZHI-GANG  , SUN XIN  ,   (1)复旦大学物理系,上海,200433; (2)南京大学固体微结构实验室,南京,210008; (3)中国科学院上海技术物理研究所红外物理开放研究实验室,上海,200083
Published: November 2020

By using the electron correlated basis function of excited state, we calculate the effect of electron interaction on the bandwidth of conductive polymers. By taking into account the electron interaction, the bandwidth is apparently narrowed as compared with that obtaind with single-electron theory. The difference is -25.9%.
A STIMULATED TRANSITION RADIATION OPTICAL KLYSTRON
Authors: JIANG HUA-BEI  ,   成都电讯工程学院高能电子学研究所,成都,610054,成都科学技术大学物理系
Published: November 2020

A new scheme of an optical klystron based on stimulated transition radiation is proposed.Calculations on spontaneous and stimulated emission are made for such a device using Madey's theorem in free electron lasers (FEL). The analysis in this paper shows that Madey's theoremcan really simplify the calculations and give clear physical concepts. The case of N mediumsections cascaded through magnetic field dispersive sections is also discussed.
INTRINSIC COERCIVITY AT LOW TEMPERATURES IN Nd2(Fe1-xMnx)14B
Authors: YANG YING-CHANG  , ZHANG XIAO-DONG  ,   北京大学物理系,北京,100871
Published: November 2020

Nd2(Fe1-xMnx)14B crystallize in the tetragonal structure, space group P42/mnm, when xiHc shows a composition dependence. The form of the virgin magnetization curve is characterized by a propagate field Hp. The value of Hp is close to that of iHc, indicating that the intrinsic coercive force is created by domain wall pinning. The temperature dependence of iHc were studied. The strength of the pinning potential barrier was estimated. The Curie temperature and saturation magnetization of Nd2(Fe1-xMnx)14B were measured. The exchange interaction in the pseudoternary compounds decreases dramatically with substitution of Mn for Fe. That results in a decrease of the thickness of domain walls. The magnetization and demagnetization behaviors in Nd2(Fe1-xMnx)14B can be understood in terms of narrow domain walls.
EFFECTS OF TEMPERATURE ON SATURATION MAGNETOSTRICTION IN IRON-RICH AMORPHOUS ALLOYS
Authors: HE ZHENG-MING  , ZHAO MIAO-YU  , ZHANG LING-FEN  , WANG XIAO-GUANG  ,   中国科学技术大学物理系,合肥,230026
Published: November 2020

This paper studied the temperature dependence of saturation magnetostriction λ4 in both systems Fe80-xCuxSi5B15 and (Fe1-xCox)82Cu0.4Si4.4B13.2. The range of temperature is respectively from room temperature to the Curie temperature of amorphous state and to that of the crystal-line state. The structural changes following the temperature variation are analyzed, and the single-ion microscopic mechanism of magnetostriction is discussed.
A STUDY OF IIIA-VA AND IIB-VIA COMPOUNDS AB(110)AND AB(1010) SURFACE RELAXATION WITH LOW-ENERGY-ELECTRON DIFFRACTION
Authors: LAN TIAN  , XU FIE-YUE  ,   电子科技大学化学系,成都,610054
Published: November 2020

We have studied the relaxation of IIIA-VIA and IIB-VIA compounds AB (110) and AB (1010) surfaces with LEED, and found that the best agreement between theory and experiment occurs in such a sturcture, in which the B atoms are tilted outward and A atoms are tilted inward, with an angle of rotation ω, keeping the bond length at surface A-B unchanged, and the first atomic surfaces layer distances d1=0.610-0.810? [for IIIA-VA (110)] , 0.536-0.825?[for IIB-VIA (110)] and 0.633-1.060?[for IIB-VIA (1010)] and the second surfaces atomic layer distances d2 = 1.300-1.610?[for IIIA-VA(ll0)] , 1.430-1.700?[for IIB-VIA (110)] and 0.820-0.930?[for IIB-VIA (1010)] and third one d3 = 1.410-2.440?[for 1I1A-VA (110)], 2.020-2.250?[for IIB-VIA (110)] and 1.910-2.440?[for IIB-VIA (1010)] . For this structure the relaxation susceptibility a are: 0.24±0.02[for IIIA-VA (110)], 0.25±0.02 [for IIB-VIA (110)] and 0.33 ±0.03 [for IIB-VIA (1010)].
AN ENERGY ANALYSIS OF SECONDARY RECRYSTALLIZA-TION IN GRAIN-ORIENTED 3%Si STEEL
Authors: LI SHU-CHEN  , CHEN MENG-ZHE  , KE JUN  ,   (1)北京科技大学,北京,100083; (2)西南交通大学,峨眉,614202
Published: November 2020

During final annealing of the grain-oriented 3%Si steel sheet, the secondary nuclei form in the subsurface layer of the sheet, but their growth modes depend on cold-rolling reduction. According to the growth characters of conventional and high permeability grain-oriented silicon steels, a quantitative relationship among the parameters, such as the diameter of primary grains, inclusion factor and critical size of secondary nuclei, is derived by the energy analysis. The calculated result is consistent with experimental data of previous works.
A STUDY OF THE AMPLITUDE FILM-GRAIN NOISE IN WHITE-LIGHT OPTICAL PROCESSING
Authors: FANG ZHI-LIANG  , ZHOU CHUN-YAN  , XU XIN  , MU GUO-GUANG  ,   南开大学现代光学研究所,天津,300071
Published: November 2020

The amplitude film-grain noises are the important noises in white-light optical processing system. Their appearance gives a low output SNR. This is mainly influenced by the filtering process in Fourier plane and the low diffraction efficiency of the encoding grating.
REALIZATION OF TWO-DIMENSIONAL MELLIN TRANSFORM
Authors: ZHENG SHI-HAI  , CHEN YAN-SONG  , LI DE-HUA  ,   中国科学院物理研究所,北京,100080
Published: November 2020

In this paper, we analyze optical realization of the 2-D Mellin transform, and propose a new method to perform the transform. The 2-D Mellin transform experiment is carried out, and the experimental results are given.
TWO-PHOTON PUMPEL SIX-AND FOUR-WAVE MIXING AND STIMULATED RADIATION IN LITHIUM VAPOR
Authors: WANG ZU-GENG  ,   华东师范大学物理系,上海,200062
Published: November 2020

This paper reports the generation of the coherent and stimulated radiation in UV, visible and infrared regions by two-photon pumping. It includes the tunable coherent radiation around 1.03 μm generated by a special six-wave mixing process, the stimulated radiation at 812.6 nm generated by molecular two-photon dissociation or atomic cascade transition, coherent radiation at 323.3 nm and 670.8 nm generated by the four-wave mixings.
INVESTIGATION OF THE SURFACE DISTORTED CRYSTALS BY DYNAMICAL X-RAY DOUBLE-CRYSTAL DIFFRACTION
Authors: ZHU NAN-CHANG  , LI RUN-SHEN  , CHEN JING-YI  , XU SHUN-SHENG  ,   中国科学院上海冶金研究所,上海,200050
Published: November 2020

A lamellar X-ray dynamic diffraction theory of the surface distorted crystals and the simulation method for obtaining information in distorted layers are presented. Influence of different double crystals' arrangement upon rocking curves(RCs) and simulation procedure are, disscussed. The relation between RCs and the depth distributions of strain and damage in distorted crystals is analysed. As an example, the simulation results of the B+ implanted Si(l00) wafers are given.