//www.getgobooth.com/ 必威体育下载 daily 15 2024-08-20 10:33:40 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-08-20 10:33:40 zh Copyright ©Acta Physica Sinica All Rights Reserved. 京ICP备05002789号-1 Address: PostCode：100190 Phone: 010-82649829，82649241,82649863 Email: apsoffice@iphy.ac.cn Copyright ©Acta Physica Sinica All Rights Reserved apsoffice@iphy.ac.cn 1000-3290 //www.getgobooth.com/en/article/doi/10.7498/aps.16.247 Author(s): CHEN YEN-FA, SONG YUH <br/><p>The branching ratio of π+→e++v+r to π+→μ++v is calculated by standard perturbation method. The universal Fermi weak interaction of V-A type and a strong interaction proposed by Salam are assumed. The result does not contradict with the most recent experiment.</p> <br/>Acta Physica Sinica. 1960 16(5): 247-251. Published 2005-08-06 Author(s): CHEN YEN-FA, SONG YUH <br/><p>The branching ratio of π+→e++v+r to π+→μ++v is calculated by standard perturbation method. The universal Fermi weak interaction of V-A type and a strong interaction proposed by Salam are assumed. The result does not contradict with the most recent experiment.</p> <br/>Acta Physica Sinica. 1960 16(5): 247-251. Published 2005-08-06 THE BRANCHING RATIO OF RADIATIVE DECAY OF π&lt;sup&lt;+&lt;/sup&lt; MESONS CHEN YEN-FA, SONG YUH 2005-08-06 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1960 16(5): 247-251. article doi:10.7498/aps.16.247 10.7498/aps.16.247 Acta Physica Sinica 16 5 2005-08-06 //www.getgobooth.com/en/article/doi/10.7498/aps.16.247 247-251 //www.getgobooth.com/en/article/doi/10.7498/aps.16.252 Author(s): CHOU KUAN-CHAO, DAI YUAN-BEN <br/><p>Dispersion relations for pion production in pion-nucleon colHssions are discussed. The scattering amplitude is written in a form, in which the operators of nucleon field are extracted from the state vectors of initial and final state. The kinematies and symmetry, properties are worked out in detail and the contribution of bound state is evaluated.</p> <br/>Acta Physica Sinica. 1960 16(5): 252-262. Published 2005-08-06 Author(s): CHOU KUAN-CHAO, DAI YUAN-BEN <br/><p>Dispersion relations for pion production in pion-nucleon colHssions are discussed. The scattering amplitude is written in a form, in which the operators of nucleon field are extracted from the state vectors of initial and final state. The kinematies and symmetry, properties are worked out in detail and the contribution of bound state is evaluated.</p> <br/>Acta Physica Sinica. 1960 16(5): 252-262. Published 2005-08-06 DISPERSION RELATIONS FOR PION PRODUCTION IN PION-NUCLEON COLLISIONS CHOU KUAN-CHAO, DAI YUAN-BEN 2005-08-06 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1960 16(5): 252-262. article doi:10.7498/aps.16.252 10.7498/aps.16.252 Acta Physica Sinica 16 5 2005-08-06 //www.getgobooth.com/en/article/doi/10.7498/aps.16.252 252-262 //www.getgobooth.com/en/article/doi/10.7498/aps.16.263 Author(s): WANG WIEM-MIN, CHOU PANG-HSIN, CHEN NENG-KUAN <br/><p>This paper described deformation and recrystallization in (110)[00l] single crystals of iron-silicon (3.25%) which reduction of thickness 5-50%. In the range of a reduction 2-16%, the slip planes ate (101), (101), (110) and (Tl0); and the twinning planes are (112) and (112). Which coincided satisfactorily with our explanation on the formation of cold-rolling textures in (110) [001] singe erystals of iron-silicon alloy.We observed that the position and growing process of recrystallized grains are difference between cold-rolling 35 % and 50 % with annealing treatment. The recrystalized grains of the former formed first at twinning boundary and preferred growth along the twinning boundary. But the latter may be formed by subgrain except forming at twinning boundary and near the deformation bands, and the preferred growth is not as apparent as former.</p> <br/>Acta Physica Sinica. 1960 16(5): 263-271. Published 2005-08-06 Author(s): WANG WIEM-MIN, CHOU PANG-HSIN, CHEN NENG-KUAN <br/><p>This paper described deformation and recrystallization in (110)[00l] single crystals of iron-silicon (3.25%) which reduction of thickness 5-50%. In the range of a reduction 2-16%, the slip planes ate (101), (101), (110) and (Tl0); and the twinning planes are (112) and (112). Which coincided satisfactorily with our explanation on the formation of cold-rolling textures in (110) [001] singe erystals of iron-silicon alloy.We observed that the position and growing process of recrystallized grains are difference between cold-rolling 35 % and 50 % with annealing treatment. The recrystalized grains of the former formed first at twinning boundary and preferred growth along the twinning boundary. But the latter may be formed by subgrain except forming at twinning boundary and near the deformation bands, and the preferred growth is not as apparent as former.</p> <br/>Acta Physica Sinica. 1960 16(5): 263-271. Published 2005-08-06 DEFORMATION AND RECRYSTALLIZATION IN (110) [001] SINGLE CRYSTALS OF IRON-SILICON ALLOY WANG WIEM-MIN, CHOU PANG-HSIN, CHEN NENG-KUAN 2005-08-06 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1960 16(5): 263-271. article doi:10.7498/aps.16.263 10.7498/aps.16.263 Acta Physica Sinica 16 5 2005-08-06 //www.getgobooth.com/en/article/doi/10.7498/aps.16.263 263-271 //www.getgobooth.com/en/article/doi/10.7498/aps.16.272 Author(s): LI GUO-DONG, WANG XIN-LIN, XIAO FU-KUANG <br/><p>Small quantities (0.1, 0.5 and 1.0 weight percent) of rare earth oxides (La2O3, CeO2, Sm2O3, Gd2O3) and Y2O3 were added to a square-loop Mg-Mn ferrite which contained some ZnO and CuO. The effect of these additions on the static hysteresis loop and the signal to noise ratio was investigated. The samples were prepared by the usual oxide method, sintered 2 hours in air at 1300℃ and quenched from l050℃ or 950℃. Preli-minary results showed that La2O3 or Gd2O3 increased the squareness ratio (B-Hm/2)/Bm and the signal to noise ratio (uV1)/(dV0). Furthermore, for a large number of cores, the distribution curve of (uV1)/(dV0) was shifted as a whole to higher values of (uV1)/(dV0). In contrast, CeO2, Sm2O3and Y2O3 additions did not show these effects. The saturation magnetization and the Curie point were not appreciably effected by the introduction of the rare earth oxides. The influence of the core size, the quenching temperature as well as the content of rare earth oxides on the squareness ratio and the signal to noise ratio was also noted.</p> <br/>Acta Physica Sinica. 1960 16(5): 272-280. Published 2005-08-06 Author(s): LI GUO-DONG, WANG XIN-LIN, XIAO FU-KUANG <br/><p>Small quantities (0.1, 0.5 and 1.0 weight percent) of rare earth oxides (La2O3, CeO2, Sm2O3, Gd2O3) and Y2O3 were added to a square-loop Mg-Mn ferrite which contained some ZnO and CuO. The effect of these additions on the static hysteresis loop and the signal to noise ratio was investigated. The samples were prepared by the usual oxide method, sintered 2 hours in air at 1300℃ and quenched from l050℃ or 950℃. Preli-minary results showed that La2O3 or Gd2O3 increased the squareness ratio (B-Hm/2)/Bm and the signal to noise ratio (uV1)/(dV0). Furthermore, for a large number of cores, the distribution curve of (uV1)/(dV0) was shifted as a whole to higher values of (uV1)/(dV0). In contrast, CeO2, Sm2O3and Y2O3 additions did not show these effects. The saturation magnetization and the Curie point were not appreciably effected by the introduction of the rare earth oxides. The influence of the core size, the quenching temperature as well as the content of rare earth oxides on the squareness ratio and the signal to noise ratio was also noted.</p> <br/>Acta Physica Sinica. 1960 16(5): 272-280. Published 2005-08-06 EFFECT OF SMALL ADDITIONS OF RARE EARTH OXIDES ON THE MAGNETIC BEHAVIOR OF A VARIETY OF SQUARE-LOOP FERRITE CORE LI GUO-DONG, WANG XIN-LIN, XIAO FU-KUANG 2005-08-06 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1960 16(5): 272-280. article doi:10.7498/aps.16.272 10.7498/aps.16.272 Acta Physica Sinica 16 5 2005-08-06 //www.getgobooth.com/en/article/doi/10.7498/aps.16.272 272-280 //www.getgobooth.com/en/article/doi/10.7498/aps.16.281 Author(s): LI GUO-DONG, ZHAI CHING-YONG, XIN HOU-WEN, CHEN ZHONG-RONG <br/><p>The yttrium-ytterbium (Y-Yb) garnet system Y3-xYbxFe3O12 was investigated at the compositions for which x=0, 0.75, 1.50, 2.25 and 3.00. The samples were prepared by the co-precipitation method and sintered 7 hours in oxygen atmosphere at 1350℃ or 1400℃. Lattice constants and theoretical densities were determined from X-ray diffraction data. It was found that the whole system consisted of a single phase with the garnet structure, and the lattice constant decreased linearly from 12.371? (Y3Fe5O12) to 12.297? (Yb3Fe5O12). The static hysteresis loop, the initial permeability at 500 Kc, the saturation magnetization between liquid-air temperature to the Curie point and the magnetic spectrum between 500 Mc and 3000 Mc were observed as a function of compositions. It was found that all the samples had high bulk densities ( &lt; 90 % theoretical densities) and high resistivities (109—1010ohm-cm), and that the saturation magnetization Vs temperature curves had positive slopes at 10W temperature for x ≥ 1.50.</p> <br/>Acta Physica Sinica. 1960 16(5): 281-288. Published 2005-08-06 Author(s): LI GUO-DONG, ZHAI CHING-YONG, XIN HOU-WEN, CHEN ZHONG-RONG <br/><p>The yttrium-ytterbium (Y-Yb) garnet system Y3-xYbxFe3O12 was investigated at the compositions for which x=0, 0.75, 1.50, 2.25 and 3.00. The samples were prepared by the co-precipitation method and sintered 7 hours in oxygen atmosphere at 1350℃ or 1400℃. Lattice constants and theoretical densities were determined from X-ray diffraction data. It was found that the whole system consisted of a single phase with the garnet structure, and the lattice constant decreased linearly from 12.371? (Y3Fe5O12) to 12.297? (Yb3Fe5O12). The static hysteresis loop, the initial permeability at 500 Kc, the saturation magnetization between liquid-air temperature to the Curie point and the magnetic spectrum between 500 Mc and 3000 Mc were observed as a function of compositions. It was found that all the samples had high bulk densities ( &lt; 90 % theoretical densities) and high resistivities (109—1010ohm-cm), and that the saturation magnetization Vs temperature curves had positive slopes at 10W temperature for x ≥ 1.50.</p> <br/>Acta Physica Sinica. 1960 16(5): 281-288. Published 2005-08-06 STUDY OF THE MAGNETIC PROPERTIES OF THE YTTRIUMYTTERBIUM GARNET SYSTEM LI GUO-DONG, ZHAI CHING-YONG, XIN HOU-WEN, CHEN ZHONG-RONG 2005-08-06 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1960 16(5): 281-288. article doi:10.7498/aps.16.281 10.7498/aps.16.281 Acta Physica Sinica 16 5 2005-08-06 //www.getgobooth.com/en/article/doi/10.7498/aps.16.281 281-288 //www.getgobooth.com/en/article/doi/10.7498/aps.16.289 Author(s): XU ZHI-YI, LENG ZHONG-ANG, LI YIN-YUAN <br/><p>The Bethe-Weiss method in the statistical theory of Heisenberg ferromagnetism is generalized and applied to the case of subtitutional solid solutions of random distribution. Calculations are carried out for binary solutions containing magnetic atoms of spin 1/2 and nonmagnetic ones. The Curie temperature v.s. composition and the paramagnetic susceptibility v.s. temperature curves are obtained for simple and body-centered cubic lattices. The degree of magnetic short-range order at the Curie point becomes higher as the concentration of non-magnetic atoms increases. The results are qualitatively applicable to solutions of two different kinds of magnetic atoms. It is also concluded that the method gives an useful approximation only for higher concentrations of magnetic atoms.</p> <br/>Acta Physica Sinica. 1960 16(5): 289-298. Published 2005-08-06 Author(s): XU ZHI-YI, LENG ZHONG-ANG, LI YIN-YUAN <br/><p>The Bethe-Weiss method in the statistical theory of Heisenberg ferromagnetism is generalized and applied to the case of subtitutional solid solutions of random distribution. Calculations are carried out for binary solutions containing magnetic atoms of spin 1/2 and nonmagnetic ones. The Curie temperature v.s. composition and the paramagnetic susceptibility v.s. temperature curves are obtained for simple and body-centered cubic lattices. The degree of magnetic short-range order at the Curie point becomes higher as the concentration of non-magnetic atoms increases. The results are qualitatively applicable to solutions of two different kinds of magnetic atoms. It is also concluded that the method gives an useful approximation only for higher concentrations of magnetic atoms.</p> <br/>Acta Physica Sinica. 1960 16(5): 289-298. Published 2005-08-06 APPLICATION OF THE BETHE-WEISS METHOD TO THE STATISTICAL THEORY OF FERROMAGNETISM OF SUBSTITUTIONAL SOLID SOLUTIONS XU ZHI-YI, LENG ZHONG-ANG, LI YIN-YUAN 2005-08-06 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1960 16(5): 289-298. article doi:10.7498/aps.16.289 10.7498/aps.16.289 Acta Physica Sinica 16 5 2005-08-06 //www.getgobooth.com/en/article/doi/10.7498/aps.16.289 289-298 //www.getgobooth.com/en/article/doi/10.7498/aps.16.299 Author(s): GUO SHUO-HONG <br/><p>The relative probability of the radioative decay of π-meson to that of π-μ decay is calculated, assuming a universal Fermi interaction of V-A type. Terms in addition to those of usual gauge invariant treatment are calculated with perturbation theory. The result does not contradict the experiment.</p> <br/>Acta Physica Sinica. 1960 16(5): 299-304. Published 2005-08-06 Author(s): GUO SHUO-HONG <br/><p>The relative probability of the radioative decay of π-meson to that of π-μ decay is calculated, assuming a universal Fermi interaction of V-A type. Terms in addition to those of usual gauge invariant treatment are calculated with perturbation theory. The result does not contradict the experiment.</p> <br/>Acta Physica Sinica. 1960 16(5): 299-304. Published 2005-08-06 THE RADIOATIVE DECAY OF π-MESON GUO SHUO-HONG 2005-08-06 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1960 16(5): 299-304. article doi:10.7498/aps.16.299 10.7498/aps.16.299 Acta Physica Sinica 16 5 2005-08-06 //www.getgobooth.com/en/article/doi/10.7498/aps.16.299 299-304

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