|
Semidecoupled Band and Shape Driving Effect of the π1/2-[541] Orbital in 170Ta
ZHANG Yu-hu, ZHAO Qing-zhong, ZHOU Xiao-hong, XU Hu-shan, GUO Ying-.iang, LEI Xiang-guo, LU Jun, ZHU Shao-fei, GOU Quan-bu, JIN Han-juan, LIU Zhong, LUO Yi-xiao, SUN Xiang-fu, ZHU Yong-tai
Chin. Phys. Lett. 1997, 14 (6):
409-412
.
High spin states in 170Ta have been studied via 159Tb(16O, 5nγ )170Ta reaction at 105MeV beam energy. Three rotational bands have been observed among which one coupled band and an unfavored ΔI = 2 transition sequence of the semidecoupled band are identified in this work. The effects of the π1/2-[541] proton intruder orbital are qualitatively discussed.
|
|
Target Dependence of N / Z Ratio of the Fragments Produced in 30 MeV/u 40Ar Induced Reactions
XU Hu-shan, ZHU Yong-tai, WEI Zhi-yong, LU Jun, WANG Qi, LI Song-lin, ZHANG Yu-hu, XIE Yuan-xiang, WU Zhong-li, ZHAO Qing-zhong, GOU Quan-bu
Chin. Phys. Lett. 1997, 14 (6):
413-416
.
An inclusive measurement was performed for 30 MeV/u 40Ar+58,64Ni and 115In. By employing the degree of freedom of N/Z, the production mechanism of the high energy component of the intermediate mass fragments (IMFs: 3 ≤ Z ≤ 13) has been discussed. Special attention has been paid to the target dependence of N/Z ratio of the energetic fragments. These IMFs may be produced by a projectile fragmentation process with energy dissipation.
|
|
Influence of Crystallization on Magnetic Properties in Co66Fe4Mo2Si16B12 Amorphous Alloy
HE Shu-li, HE Kai-yuan, WANG Zhi, CHENG Li-zhi, FU Yu-jun
Chin. Phys. Lett. 1997, 14 (6):
464-467
.
The annealing effects on the magnetic properties and structures of Co66Fe4Mo2Si16B12 amorphous alloy were studied by means of ballistic method and x-ray diffraction technique respectively. During the isothermal annealing at Ta = 460°C, the initial permeability μi of the sample increased at first, then decreased with the annealing time ta and exhibited a maximum at about ta = 45 min. Meanwhile, it was found that magnetostriction λs changed with ta and ran through zero at about ta = 45min. The x-ray diffraction results showed that the sample was still in an amorphous state in the whole 460°C isothermal annealing process ( ta = 0-120min). After the annealing temperature increased to 480°C, α-Fe(Co,Si) phase began to precipitate, then, Co3Mo crystallites and other phases were formed subsequently at 500°C. The results of magnetic measurement indicated that the formation of any crystalline phases should lead to the deterioration of magnetic properties.
|
|
Unit-Cell by Unit-Cell Epitaxial Growth of SrTiO3 and BaTiO3 Thin Films by Laser Molecular Beam Epitaxy
YANG Guo-zhen, , LÜ, Hui-bin, WANG Hui-sheng, , CUI Da-fu, , YANG Hai-qing, WANG Hua, ZHOU Yue-liang, , CHEN Zheng-hao,
Chin. Phys. Lett. 1997, 14 (6):
478-480
.
Atomically regulated unit-cell by unit-cell homoepitaxial SrTiO3 and heteroepitaxial BaTiO3 films were fabricated on SrTiO3(100) substrates by laser molecular beam epitaxy. The fine streak patterns and more than 1000 cycles undamping intensity oscillation were obtained by in situ reflection high-energy electron diffraction with precisely controlled intermittence between each unit-cell layer. The surface morphology of the films was examined by atomic force microscopy. The root-mean-square surface roughness of the films is about 0.1 nm.
|
22 articles
|