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Volume 3 Issue 7
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Original Articles
THE ROLE OF PARTON HARD SCATTERING IN HADRONIC INTERACTIONS
ZHU Qingqi, DING Linkai, JING Cailiu, JING Guiru
Chin. Phys. Lett. 1986, 3 (7): 289-292 .  
Abstract   PDF(pc) (46KB) ( 397 )
A soft-hard two-component approach to the description of high energy hadronic interactions is proposed. It shows the important role of parton hard scattering in explanation of the chief characteristics of high energy hadronic interactions.

SUPERRADIANCE FROM AN ARBITRARY DIMENSIONAL LATTICE
LUO Liaofu, LING Yinsheng*
Chin. Phys. Lett. 1986, 3 (7): 293-296 .  
Abstract   PDF(pc) (35KB) ( 376 )
Superradiance of two level atoms from a lattice of arbitrary dimension is discussed which is resonant sharply with some definite momenta of photons. Both the photon superradiant and the photon trapping (squeezing) from the lattice are expected theoretically.
PHOTO-INDUCED REVERSIBLE CHANGE OF URBACH EDGE IN HYDROGENATED AMORPHOUS SILICON
HAN Daxing, QIU Changhua, WU Wenhao
Chin. Phys. Lett. 1986, 3 (7): 297-300 .  
Abstract   PDF(pc) (44KB) ( 380 )
Photoconductivity spectra temperature dependence combining with transmission measurements have been formed on hydrogenated amorphous silicon. After exposure by AM1 light a reversible increase of 6% of the Urbach parameter E0 (T,X) has been observed. This is a direct evidence for the fact that photo-induced changes in a-Si:H create not only metastable defects but also affect the topological disorder.
HIGH ENERGY γ-RADIOACTIVE SOURCE- A NEW APPLICATION OF Am-Be NEUTRON SOURCE
YE Zongyuan, LI Jingwen, YUE Gang, SHI Detang
Chin. Phys. Lett. 1986, 3 (7): 301-304 .  
Abstract   PDF(pc) (47KB) ( 415 )
Discrete high energy y-rays in~5-10MeV region were produced utilizing a~ 105 / s Am-Be neutron source through the radiation capture process. The device can be conveniently used for energy calibration and relative efficiency determination for γ-detectors.

SUPERSYMMETRY THEORY OF THE 1+1 DIMENSIONAL SOLITON-FERMION SYSTEM
YANG Zhenqing, KONG Fanmei
Chin. Phys. Lett. 1986, 3 (7): 305-308 .  
Abstract   PDF(pc) (42KB) ( 471 )
A suitable supersymmetry Lagrangian density is found to describe the 1+1 dimensional soliton-fermion coupled system. The general exact solutions of the field equations of the system are found.

THE INFLUENCE OF THE PROMOTOR Co ATOMS ON THE ELECTRONIC STRUCTURE OF THE HIGHLY EDGED PLANE OF MoS2 CRYSTAL
HU Yongjun, LIN Zhangda, WANG Changheng, XIE Kan
Chin. Phys. Lett. 1986, 3 (7): 309-312 .  
Abstract   PDF(pc) (58KB) ( 434 )
To elucidate the promotion action of cobalt on Mo sulfide catalysts, UV-Photoelectron Spectroscopy(UPS), X-ray Photoelectron Spectroscopy (XPS) and Lou Energy Diffraction(LEED) have been applied to study the submonolayer deposited process of metal Co on the highly edged surfaces of MoS2 crystal. The results show that the electronic effect near EF rather than the chemical changes on the surfaces, might be primary influence.


THEORY OF THE <100> UNIAXIAL STRESS DEPENDENCE OF THE DEEP LEVELS IN Gap and GaAs
REN Shangyuan, MAO Deqiang, LI Mingfu*
Chin. Phys. Lett. 1986, 3 (7): 313-316 .  
Abstract   PDF(pc) (42KB) ( 350 )
We extend previous theoretical work to predict the derivatives with respect to the <100> uniaxial stress of the substitutional deep point defect energy levels in Gap and GaAs which, for a defect at a specific site producing a level of particular symmetry, can be evaluated as a function of their energy levels in the band gap.
THE CURIE TEMPERATURE RELAXATION BEHAVIOR OF METGLASES 2826 AND ( Fe0.1Co0.55Ni0.35)78Si8B14 UNDER HIGH PRESSURE
SHEN Zhongyi, HONG Jinxing, YIN Xiujun, ZHANG Yun, HE Shouan
Chin. Phys. Lett. 1986, 3 (7): 317-320 .  
Abstract   PDF(pc) (54KB) ( 348 )
Relaxation behavior of the Curie temperature (TC) of two amorphous alloys Fe40Ni40P14B6 and ( Fe0.1Co0.55Ni0.35)78Si8B14 was investigated under high pressure up to 20kbar. Experimental results show that Tc relaxation process was restrained by high pressure. On the other hand, alternative treating sample at different pressures may enhance this process. Based on the expansion of local pressed region in an amorphous structure, a mechanism of relaxation under high pressure was suggested for explaining the above phenomena.
ECRH FOR PROVIDING AN ACCESS TO THE SECOND STABILITY REGION
CHEN Yangping, KE Fujiu, TSAI shihtung
Chin. Phys. Lett. 1986, 3 (7): 321-324 .  
Abstract   PDF(pc) (49KB) ( 311 )
The electron cyclotron resonance heating (ECRH) processes to produce the energetic trapped electrons are proposed. Injecting the RF waves on a certain magnetic surface with proper frequency and wave vector. are suggested. By the relay of different high electron cyclotron harmonic resonances a few percent of electrons are heated up to a desired energy.
DETECTION OF FERROELASTIC PHASE TRANSITION OF LiKSO4 CRYSTAL BY DEPOLARIZATION OF TRANSMITTED LIGHT
ZHANG Xuxin, SHEN Jianxiang, JIA Weiyi
Chin. Phys. Lett. 1986, 3 (7): 325-328 .  
Abstract   PDF(pc) (46KB) ( 399 )
A new method to detect multidomain phase transition by measuring the depolarization of transmitted light is reported. As an example, the ferroelastic phase transition in LiKSO4 was investigated in more detail. It was found that the multidomain phase F3 was ferroelastic. More accurate transition temperatures between phases F2 and F3 in cooling and heating cycle were determined to be -85°C and -79°C respectively.
COLLIDING PULSE MODE-LOCKED Nd:YAG AND Nd:PHOSPHATE GLASS LASERS
LIN Lihuang, SHENG Guoping, ZHANG Weiqing, KANG Yuying
Chin. Phys. Lett. 1986, 3 (7): 329-332 .  
Abstract   PDF(pc) (44KB) ( 348 )
Using pentamethylidyne dye as a saturable absorber, we have obtained pulses close to Fourier-transform limit from colliding pulse mode-locked Nd:YAG and Nd:phosphate glass lasers with minim pulse durations of 8 psec and 3.7 psec, respectively.

GEOMETRIC APPROACH TO FOKKER-PLANCK EQUATION, CONSERVATION LAW
CHU Fuming, FANG Fukang
Chin. Phys. Lett. 1986, 3 (7): 333-335 .  
Abstract   PDF(pc) (32KB) ( 334 )
Fokker-Planck equation (FPE) has been studied by using the geometric theory for partial differential equations. We give the differential ideal generated by three differential forms, which is geometrically equivalent to the original FPE. Then we obtain a class of conversation laws and conserved quantities for FPE from this differential ideal. The applications of the conservation laws and conserved quantities are discussed.
12 articles