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Volume 2 Issue 2
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Original Articles
THE THIRD ORDER COHOMOLOGY CYCLE FOR GAUGE GROUP AND THE ANOMALOUS ASSOCIATIVE LAW FOR GAUGE TRANSFORMATION
HOU Bo-yu, HOU Bo-yuan*
Chin. Phys. Lett. 1985, 2 (2): 49-52 .  
Abstract   PDF(pc) (45KB) ( 343 )
This note shows that the nontrivial third order cohomology cycle for gauge group implies the existence of anomalous associative law and consequently anomaly for Jacobi identity.
NEW EVIDENCE OF STABILIZATION OF HIGH Tc A15 Nb3Ge PHASE BY Nb5Ge3
ZHAO Bai-ru, GAO Ju, LI Lin
Chin. Phys. Lett. 1985, 2 (2): 53-54 .  
Abstract   PDF(pc) (28KB) ( 346 )
Many scientists hypothesized that the presence of oxygen is necessary for the formation and stabilization of the metastable high Tc A15 Nb3Ge phase in Nb-Ge films. In our previous work we proposed that a certain amount of Nb5Ge3 may play a role in stabilizing the high Tc A15 phase. New experimental results of induction measurement on the Nb-Ge films support our proposal.


ON A CLASS OF EXACT SOLUTIONS OF THE BOLTZMANN EQUATION
DING E-jiang, HUANG Zu-qia
Chin. Phys. Lett. 1985, 2 (2): 55-58 .  
Abstract   PDF(pc) (37KB) ( 400 )
A class of spatially dependent exact solutions of the Boltzmann equation for a gas of monatomic Maxwell molecules is obtained and discussed. The similarity solution describing a gas uni-formly flying away proposed by Bobylev1 is included in this class as a special case.

COULD THE NEW PARTICLE (8.32) BE A HIGGS?
DU Tung-sheng and WU Dan-di
Chin. Phys. Lett. 1985, 2 (2): 59-62 .  
Abstract   PDF(pc) (44KB) ( 345 )
Possibilities of (8.32) being an 0++ or 0-+ Higgs are examined. Possible mixrings between Higgs and corresponding bottomia are considered. It seems that the ratio Br[ T ( 2s ) → γ ]/ Br[ T ( 1s ) → γ ]<0.22 could hardly be understood if is an 0-+ Higgs, but may be understood if is an 0++ Higgs.


EMC EFFECT AND THE DISTORTION OF THE VACUUM IN NUCLEI
PENG Hung-an*, CHAO Wei-qing**, LIU Lian-sou and LIU Feng
Chin. Phys. Lett. 1985, 2 (2): 63-66 .  
Abstract   PDF(pc) (43KB) ( 353 )
Based on the argument that the bag radius of a bounded nucleon is larger than that of a free one due to the change of vacuum property in nucleus, a good fit is obtained for the EMC effect.
THE DISTRIBUTION AMPLITUDE FOR PION AND QCD SUM RULES
HUANG Tao, WANG Xin-nian, XIANG Xiao-dong
Chin. Phys. Lett. 1985, 2 (2): 67-70 .  
Abstract   PDF(pc) (43KB) ( 453 )
A convenient method is presented to compute the moments of the distribution amplitude for pion and a possible model form is proposed to fit the experimental data.
TEMPERATURE DEPENDENCE OF INDUCED MAGNETIC ANISOTROPIES IN NEARLY NON-MAGNETOSTRICTIVE METALLIC GLASSES
CHEN Du-xing and DAI Li-zhi
Chin. Phys. Lett. 1985, 2 (2): 71-74 .  
Abstract   PDF(pc) (54KB) ( 364 )
The temperature dependence of magnetization- and strain-induced magnetic anisotropy constants is reported in two nearly non-magnetostrictive CoFeSiB based metallic glasses. It is in accordance with the single-ion theory of uniaxial magnetic anisotropy. It seems that this theory can be regarded as a basis for discussing the nature of induced magnetic anisotropy in some metallic glasses.
MAGNETIC MOMENT AND CURIE TEMPERATURE OF AMORPHOUS Fe90-XCoXZr10 ALLOYS
SHEN Bao-gen, ZHAN Wen-shan, ZHAO Jian-gao and ZHENG Xiao-nian
Chin. Phys. Lett. 1985, 2 (2): 75-78 .  
Abstract   PDF(pc) (54KB) ( 379 )
The magnetic moments and Curie temperatures of amorphous Fe90-XCoXZr10(0x90) alloys have been measured experimentally. For x 30, the great enhancement of the magnetic moment is explained by the increase of magnetic moment of iron atoms and the existence of two magnetic regions, while the increase of the Curie temperature with Co content is interpreted by the interactions of Fe-Co atoms which will be larger than that of Fe-Fe and Co-Co.
PRELIMINARY INVESTIGATIONS ON MAGNETIC PROPERTIES OF NdFeB ALLOYS WITH HIGH MAGNETIC ENERGY PRODUCT
WANG Zhen-xi, GONG Wei, WANG Yi-zhon, FENG Min-ying, WU Zhon-lin, HUONG Yong-cheng*, CAO Yong-jing*
Chin. Phys. Lett. 1985, 2 (2): 79-82 .  
Abstract   PDF(pc) (55KB) ( 497 )
NdFeB permanent magnets of (BH)max = 41MGOe were prepared by powder metallurgy. A typical specimen, Nd16.4Fe76.6B7 alloy, was measured and analyzed. The crystallization process of this alloy near 1400K appeared very complicated. Non-uniform distribution of Nd atoms in the alloy shows that a second phase may exist. At low temperatures the easy direction for magnetization will become canting.
OBSERVATION AND ANALYSIS OF THE ACCUMULATION LINES OF SPACE CHARGES IN α-LiIO3 UNDER A DC ELECTRIC FIELD ALONG C-AXIS
ZHANG Guang-yin, LIU Jian, FENG Shang-ting
Chin. Phys. Lett. 1985, 2 (2): 83-86 .  
Abstract   PDF(pc) (53KB) ( 370 )
We have observed the granular deposition of metallic Li on the α-LiIO3 surface in contact with the cathode of DC field by a scanning electron microscope. The relationship between the accumulation lines of space charges und the ionic transportation along c-axis is discussed.



THE ANISOTROPY OF COSMIC RAY PARTICLES IN THE ENERGY RANGE 1011-1019eV
XU Chun-xian
Chin. Phys. Lett. 1985, 2 (2): 87-90 .  
Abstract   PDF(pc) (49KB) ( 377 )
A study of the anisotropy of primary cosmic rays is presented. The expression of the anisotropy was derived in a model of discrete sources in an infinite galaxy. Using these derived formulas, the amplitudes of the first harmonic anisotropy caused by eleven supernovae nearby the Earth were calculated individually and the trend of the resultant anisotropy was investigated. It was found that the expected results can account for the power law of E0.5 of the anisotropy above an energy 5x1015eV, and the Compton-Getting effect is responsible for the anisotropies in the energy range 1011-1014eV. Furthermore, we have got the streaming velocity of 35km/s with respect to the cosmic ray background.
UM663-AN ILLUSTRATION OF THE CERENKOV REDSHIFT
FENG Zheng-yong, LIN Hua, CHENG Fu-hua*
Chin. Phys. Lett. 1985, 2 (2): 91-92 .  
Abstract   PDF(pc) (32KB) ( 309 )
In this paper, we point out that the spectrum of the quasar UM663 can not be explained by photoionization models; on the contrary, it can be explained by the theory of Cerenkov line radiation. The Cerenkov redshift Δλc( 24Å )of the emission line Lα of this quasar has been estimated from the position of Nv absorption line in the Lα-Nv profile.


PRESSURE DEPENDENCE OF DEEP LEVELS IN Gap
REN Shang-yuan
Chin. Phys. Lett. 1985, 2 (2): 93-94 .  
Abstract   PDF(pc) (39KB) ( 490 )
The pressure dependence of deep energy levels associated with substitutional point defects in GaP is investigated using an approach proposed before. A deep level can be driven out of the gap into the valence bands, if this level is caused by a P-substitutional defect and located sufficiently close to the valence band maxim in the unpressurized solid. No deep level can be driven into the gap from the conduction bands by the pressure. The theoretical calculations are in good agreement with the experimental results.

13 articles