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Structure of H-Dihyperon
SHEN Peng-Nian, , ZHANG Zong-Ye, YU You-Wen, YUAN Xiu-Qing, YANG Shu
Chin. Phys. Lett. 2000, 17 (1):
7-9
.
The structure of H dihyperon (DH) is investigated by employing the SU (3) chiral quark model. As the structure of DH, two different configuations, six-quark cluster configuration and two-cluster configuration, are considered, respectively. The result shows that except the σ chiral field, the overall effect of the other SU (3) chiral fields is destructive in forming a stable DH and the two-cluster configuration is the preferred structure. The resultant mass of DH in a three-coupled-channel calculation in the SU (3) chiral quark model is ranged from 2225 to 2234 MeV.
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Electro-optical Properties and Temporal Stability of the Guest-Host DCNP/PEK-c Polymer Thin Film
SHI Wei, FANG Chang-Shui, PAN Qi-Wei, SUN Xun, GU Qing-Tian, XU Dong, WEI Hong-Zhen, YU Jin-Zhong
Chin. Phys. Lett. 2000, 17 (1):
22-24
.
The polyetherketone (PEK-c) guest-host system thin films in which the range of the weight percent of 3-(1,l-dicyanothenyl)-l-phenyl-4, 5-dihydro-1H-pryazole (DCNP) is from 20% to 50% were prepared. The predicted high value of electro-optical (EO) coefficient γ33 = 48.8pm/V by using two-level model was obtained when the weight percent of DCNP in the polymer system is 40%.whereas EO coefficients are attenuated at higher chromophore loading than 40%. The temporal stability of the EO activity of the guest-host polymer was evaluated by probing the decay of the orientational order of the chromophores in the polymer system.
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Splitting Behaviour of Implanted MeV Au+ Ions in LiB3O5
WANG Ke-ming, SHI Bo-rong, Nelson Cue, LU Fei, WANG Feng-xiang, XIE Zhao-xia, SHEN Ding-yu, LIU Yao-gang
Chin. Phys. Lett. 2000, 17 (1):
40-42
.
The diffusion behaviour of 1.0 and 2.0MeV Au+ implanted into LiB3O5 single crystal has been studied by the Rutherford backscattering of 2.1 MeV He ions. Annealing was performed at temperatures of 600, 700, and 800°C each for 30min. The results show that the diffusion behaviour is quite different in two cases. In LiB3O5, the depth distribution of the 1.0 MeV Au is nearly Gaussian and becomes bimodal after annealing at 800°C for 30min. But in the case of 2.0MeV, the depth distribution of as implanted Au+ in LiB3O5 has splitting behaviour. After 800°C for 30min annealing, there is no obvious diffusion observed. The precise interpretation is needed.
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A Novel Oligomer Poly (Phenylene Vinylene) Derivative Containing Oxadiazole Segment
YANG Xiao-Hui, YIN Shou-Gen, WANG Zhen-Jia, HOU Yan-Bing, XU Zheng, XU Xu-Rong, PENG Jun-Biao, LI Wen-Lian
Chin. Phys. Lett. 2000, 17 (1):
58-60
.
A novel oligomer PPV derivative (OPPV) is reported, which is designed to contain the oxadiazole function segment in the main chain. Photoluminescence of the OPPV thin film originates from aggregated states. In a double layer device consisting of poly phenylene vinylene (PPV) and OPPV, emission only from PPV layer was observed and the efficiency of the device was improved by about one order of magnitude compared with the single layer PPV device, this indicates the electron transport characteristic of OPPV. In the OPPV/Tb complex device, OPPV functions as the hole transport layer. A possible explanation is proposed.
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Implementation of Quantum Logic Gates by Nuclear Magnetic Resonance Spectroscopy
DU Jiang-Feng, WU Ji-Hui, SHI Ming-Jun, HAN Liang, ZHOU Xian-Yi, , YE Bang-Jiao, WENG Hui-Ming, HAN Rong-Dian,
Chin. Phys. Lett. 2000, 17 (1):
64-66
.
Using nuclear magnetic resonance techniques with a solution of cytosine molecules, we show an implementation of certain quantum logic gates (including NOT gate, square-root of NOT gate and controlled-NOT gate), which have central importance in quantum computing. In addition, experimental results show that nuclear magnetic resonance spectroscopy can efficiently measure the result of quantum computing without attendant wave-function collapse.
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Dependence of Spiral Galaxy Distribution on Viewing Angle in RC3
MA Jun, SONG Guo-Xuan, SHU Cheng-Gang
Chin. Phys. Lett. 2000, 17 (1):
70-72
.
The normalized inclination distributions are presented for the spiral galaxies in RC3. The results show that, except for the bin of 8l°-90°, in which the apparent minor isophotal diameters that are used to obtain the inclinations are affected by the central bulges, the distributions for Sa, Sab, Scd and Sd are well consistent with the Monte-Carlo simulation of random inclinations within 3-σ, and Sb and Sbc almost, but Sc is different. One reason for the difference between the real distribution and the Monte-Carlo simulation of Sc may be that some quite inclined spirals, the arms of which are inherently loosely wound on the galactic plane and should be classified to Sc galaxies, have been incorrectly classified to the earlier ones, because the tightness of spiral arms which is one of the criteria of the Hubble classification in RC3 is different between on the galactic plane and on the tangent plane of the celestial sphere. Our result also implies that there might exist biases in the luminosity functions of individual Hubble types if spiral galaxies are only classified visually.
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26 articles
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