Sub-femtosecond passive synchronization of Ti : sapphire lasers
文献类型：期刊论文
| 作者 | Tian, JR ; Wei, ZY ; Wang-Peng ; Zhao, LH ; Wang, ZH ; Zhang, J ; Han, HN ; Zhang, J |
| 刊名 | ACTA PHYSICA SINICA
 |
| 出版日期 | 2005 |
| 卷号 | 54期号:1页码:129 |
| 关键词 | CR-FORSTERITE LASERS PULSES OPERATION |
| ISSN号 | 1000-3290 |
| 通讯作者 | Tian, JR (reprint author), Chinese Acad Sci, Inst Phys, Lab Opt Phys, POB 603, Beijing 100080, Peoples R China. |
| 中文摘要 | The crystal structure of non-metamict Ti- and Fe2+-rich chevkinite-(Ce) has been redetermined with the single-crystal sample collected from Bayan Obo, Inner Mongolia, China. The chemical formula of the sample is Ce4Fe2Ti3Si4O22. The crystals are monoclinic with the unit cell parameters a = 13.4656(15) angstrom, b = 5.7356(6) angstrom, c = 11.0977(12) angstrom, beta= 100.636(2)degrees, V = 842.39 (16) angstrom(3) and Z = 2. The structures of Ti- and Fe2+-rich chevkinite-(Ce) were refined with space groups P2(I)/a and C2/m. Least-squares refinement results show that both structural models of Ti- and Fe2+-rich chevkinite-(Ce) are very good, R[F-2> 2 sigma(F-2)] =0.027 with P2(1)/a and R[F-2> 2 sigma(F-2)] =0.021 with C2/m. In order to illustrate the relationship between the two space groups P2(1)/a and C2/m, the distribution of diffraction intensities was inspected. Pseudo extinction was found, i.e., reflections with h+k=2n are systematically strong, while those with h+k=2n+1 are weak. By neglecting the systematically weak (h+k=2n+1) reflections the space group becomes C2/m. There is a mirror plane in the C2/m perpendicular to the b axis. However, oxygen atoms in the P2(1)/a model are of a symmetrical relationship with the corresponding pseudo mirror plane. It is concluded that the crystal structure of non-metamict Ti- and Fe2+-rich chevkinite-(Ce) is a superstructure with the space group of P2(1)/a, which is of pseudo symmetry corresponding to the space group C2/m. |
| 收录类别 | SCI |
| 语种 | 中文 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/53892]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Tian, JR,Wei, ZY,Wang-Peng,et al. Sub-femtosecond passive synchronization of Ti : sapphire lasers[J]. ACTA PHYSICA SINICA,2005,54(1):129. |
| APA | Tian, JR.,Wei, ZY.,Wang-Peng.,Zhao, LH.,Wang, ZH.,...&Zhang, J.(2005).Sub-femtosecond passive synchronization of Ti : sapphire lasers.ACTA PHYSICA SINICA,54(1),129. |
| MLA | Tian, JR,et al."Sub-femtosecond passive synchronization of Ti : sapphire lasers".ACTA PHYSICA SINICA 54.1(2005):129. |
入库方式： OAI收割
来源：物理研究所
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