Relativistic aspects of HMO

Ｒｅｌａｔｉｖｉｓｔｉｃ ａｓｐｅｃｔｓ ｏｆ ＨＭＯ￥ＷＡＮＧＧａｎｇ（ＰｈｙｓｉｃｓＤｅｐａｒｔｍｅｎｆ，ＵｎｉｙｅｒｓｉｔｙｏｆＥｌｅｃｆｒｏｎｉｃＳｃｉｅｎｃｅ　ａｎｄＴｅｃｈｎｏｌｏｇｙｏｆＣｈｉｎａ，Ｃｂｏｎｇｄｕ６１００５４，Ｃｈｉｎａ...     

光谱研究用激光器的发展近况

光谱研究用激光器的发展近况ＲｅｃｅｎｔＤｅｖｅｌｏｐｍｅｎｔｏｆＬａｓｅｒｓＦｏｒＳｐｅｃｔｒｏｓｃｏｐｙＨｅｒｂｅｒｔＰｕｍｍｅｒ，Ｐｈ．Ｄ．，ＶｉｃｅＰｒｅｓｉｄｅｎｔＣｏｈｅｒｅｎｔ，Ｉｎｃ．，ＣｏｈｅｒｅｎｔｌａｓｅｒＧｒｏｕｐＴｈｉｓｐａｐ...     

Intrinsic angular momentum in HMO

ＩｎｔｒｉｎｓｉｃａｎｇｕｌａｒｍｏｍｅｎｔｕｍｉｎＨＭＯＷＡＮＧＧａｎｇ（ＰｈｙｓｉｃｓＤｅｐａｒｔｍｅｎｔ，ＵｎｉｖｅｒｓｉｔｙｏｆＥｌｅｃｔｒｏｎｉｃＳｃｉｅｎｃｅａｎｄＴｅｃｈｎｏｌｏｇｙｏｆＣｈｉｎａ，Ｃｈｅｎｇｄｕ６１００５４，Ｃｈｉｎａ...     

An Innovative Multiple-layer Electro-optical Q-switch

ＡｎＩｎｎｏｖａｔｉｖｅＭｕｌｔｉｐｌｅ┐ｌａｙｅｒＥｌｅｃｔｒｏ┐ｏｐｔｉｃａｌＱ┐ｓｗｉｔｃｈＬＥＵＮＧＣｈｕｎｇｙｅｅＨＵＡＮＧＨｓｉｅｎｃｈｕｅｎ（ＩｎｓｔｉｔｕｔｅｏｆＯｐｔｉｃａｌＳｃｉｅｎｃｅｓ，ＣｅｎｔｒａｌＵｎｉｖｅｒｓｉｔｙ，Ｃｈ...     

Predicting Raman Spectra with ab initio Calculations

ＰｒｅｄｉｃｔｉｎｇＲａｍａｎＳｐｅｃｔｒａｗｉｔｈａｂｉｎｉｔｉｏＣａｌｃｕｌａｔｉｏｎｓＪａｍｅｓＲ．Ｄｕｒｉｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＵｎｉｖｅｒｓｉｔｙｏｆＭｉｓｏｕｒｉ－ＫａｎｓａｓＣｉｔｙＫａｎｓａｓＣｉｔｙ，ＭＯ...     

Raman Spectroscopic Study of Nanophase Titanium Dioxide

ＲａｍａｎＳｐｅｃｔｒｏｓｃｏｐｉｃＳｔｕｄｙｏｆＮａｎｏｐｈａｓｅＴｉｔａｎｌｕｍＤｉｏｘｉｄｅＰｅｉＦｅｉ￣＋；ＨｕａｎｇＱｉａｎｇａｎｄＺｈａｎｇＭｉｎｇ一Ｓｈｅｎｇ（ＰｈｙｓｉｃｓＤｅｐａｒｔｍｅｎｔ￣＋，ＣｏｍｐｕｔｅｒＣｅｎｔｅｒ，Ｃｅｎ...     

New system for making stereoscopic holograms

ＮｅｗｓｙｓｔｅｍｆｏｒｍａｋｉｎｇｓｔｅｒｅｏｓｃｏｐｉｃｈｏｌｏｇｒａｍｓＴＡＮＧＪｉｙｕｅ；ＧＵＯＬｕｒｏｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＩｎｆｏｒｍａｔｉｏｎＯｐｔｉｃｓ，ＳｉｃｈｕａｎＵｎｉｖｅｒｓｉｔｙ，Ｃｈｅｎｇｄｕ６１００６４，Ｃｈｉｎａ...     

Effective Reflection Area of a Cube Corner Retroreflector

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ　　Ａｃｕｂｅｃｏｒｎｅｒｒｅｔｒｏｒｅｆｌｅｃｔｏｒ (ＣＣＲ)ｉｓａｎｉｍｐｏｒｔａｎｔｏｐｔｉｃａｌｅｌｅｍｅｎｔ,ｗｈｉｃｈｈａｖｅｔｗｏｓｔｒｕｃｔｕｒｅｓ.ＯｎｅｉｓｎａｍｅｄａｆｔｅｒａｓｏｌｉｄＣＣＲｔｈａｔｉｓａｔｅｔｒａｈｅｄｒｏｎｍａｄｅｏｆｇｌａｓｓ ,ａｎｄｔｈｅａｔｈｅｒｉｓｄｅｓｃｒｉｂｅｄａｓａｈｏｌｌｏｗＣＣＲｍａｄｅｕｐｏｆｔｈｒｅｅｍｉｒｒｏｒｓｔｈａｔａｒｅｐｅｒｐｅｎｄｉｃｕｌａｒｔｏｅａｃｈｏｔｈｅｒ.Ｉｎｔｈｅｓｅｔｗｏｓｔｒｕｃ…     

Time－dependentTheoryofRamanScatteringwithPulses－－ApplicationtoContinuumRamanSpectroscopy

Ｔｉｍｅ－ｄｅｐｅｎｄｅｎｔＴｈｅｏｒｙｏｆＲａｍａｎＳｃａｔｔｅｒｉｎｇｗｉｔｈＰｕｌｓｅｓ－－ＡｐｐｌｉｃａｔｉｏｎｔｏＣｏｎｔｉｎｕｕｍＲａｍａｎＳｐｅｃｔｒｏｓｃｏｐｙＳｏｏ－Ｙ．Ｌｅｅ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，Ｆａｃｕｌ...     

Laser Induced Damage in CVD Diamond Films

ＬａｓｅｒＩｎｄｕｃｅｄＤａｍａｇｅｉｎＣＶＤＤｉａｍｏｎｄＦｉｌｍｓＱＩＵＨｏｎｇＦＡＮＺｈｅｎｇｘｉｕ（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＯｐｔｉｃｓａｎｄＦｉｎｅＭｅｃｈａｎｉｃｓ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ，Ｐ．Ｏ．...     

二硼酸锂晶体的压致非晶化研究

二硼酸锂晶体的压致非晶化研究李玉栋，扈士芬，蓝国祥（南开大学物理系天津３０００７１）Ｐｒｅｓｓｕｒｅ－ＩｎｄｕｃｅｄＡｍｏｒｐｈｉｓａｔｉｏｎｏｆＬｉｔｈｉｕｍＤｉｂｏｒｉｔｅ￥ＹｕｄｏｎｇＬｉ；ＳｈｉｆｅｎＨｕａｎｄＧｕｏｘｉａｎｇＬａｎ（Ｄｅｐａ...     

Hydrogen solubility in amorphous Mg<Subscript>0.6</Subscript>SiO<Subscript>2.6</Subscript> at high pressure

The solubility of hydrogen in amorphous Mg_0.6SiO_2.6 at a temperature of 250°C and pressures up to 75 kbar is studied using a quenching technique. The molar ratio H₂/formula unit is found to nonlinearly increase with pressure from x = 0.12 at P = 10 kbar to x = 0.303 at P = 75 kbar. An investigation of the quenched samples by Raman spectroscopy demonstrated that hydrogen dissolves in amorphous Mg_0.6SiO_2.6 in the form of H₂ molecules. X-ray diffraction and Raman studies showed that the hydrogenation of the samples is likely to be accompanied by a phase transition in the amorphous lattice of Mg_0.6SiO_2.6 at P ≈ 52.5 kbar to a denser amorphous modification.     

晶体压致非晶化的拉曼散射研究

本文主要介绍压致非晶化研究的进展，其中包括我们对β—ＢａＢ＿２Ｏ＿４，ＬｉＢ＿３Ｏ＿５，Ｐｂ＿５Ｇｅ＿３Ｏ＿１１和Ｌｉ＿２Ｇｅ＿７Ｏ＿（１５）的拉曼散射研究结果。综述了压致非晶的结构特征，压致非晶转变机制和重新晶化过程。     

Ni83Cr7Fe3Si4B3非晶态合金在常压及高压下的晶化过程

本文研究了Ni₈₃Cr₇Fe₃Si₄B₃非晶态合金在1bar及100kbar压力下的晶化过程,得到了“时间-温度-变态”图。其结果表明:经高压热处理后的非晶合金其晶化温度降低,fcc-Ni相区域加宽及亚稳Ⅱ相没有形成。另外,还分别计算了常压及100kbar压力下的晶化激活能。 关键词：     

X-ray absorption study of Cu,Zn SOD under high pressure

Abstract

We have investigated Cu, Zn Superoxide Dismutase (Cu, Zn SOD) metal sites at high pressure using X-ray absorption. XAS (X-ray Absorption Spectroscopy) gives information on local structure and it is particularly suited to metal site investigation. To the best of our knowledge, this is the first time that protein conformational states have been investigated using the high pressure XAS technique. Cu, Zn SOD catalyses the dismutation of toxic oxygen radicals produced in cells; this reaction occurs at the copper metal site. Structural changes around the copper, induced by pressure, can be directly related to protein substates. Their characterisation is thus important in the understanding of protein activity.

The high-pressure device was a Paris-Edinburgh large volume cell.

Experiments were performed on lyophilised Cu, Zn SOD between 0 and 48 kbar at the copper and zinc K-edges. The two metal local atomic environments have a different behaviour as pressure increases: copper exhibits a more flexible environment; on the contrary, zinc shows small structural modifications. We have identified a state, formed between 3 and 8 kbar, which is stable up to 48 kbar.     

Superconductivity and phase stability of selenium at high pressures

Hexagonal Se shows no indication of a transformation to a metallic, superconducting phase up to 160 kbar. Amorphous Se transforms at about 130 kbar to an unstable metallic, superconducting state which anneals slowly at room temperature toward a non-metallic, non-superconducting phase. Monoclinic Se behaves much like amorphous Se. X-ray diffraction indicates that all samples are in the hexagonal phase after release of pressure.     

Hydrostatic pressure effect on the transformations of amorphous La3Si

Measurements of the relative resistance versus temperature at different hydrostatic pressures up to 30 kbar for amorphous La₃Si have been carried out. The results show that there is a metastable phase only at low pressures and that pressure decreases the crystallization temperature of the stable state (or final phase) from both the amorphous and meta-stable phases. If the pressure is sufficiently high, the transformation from the amorphous to a stable state might occur at room temperature.     

高温高压下非晶Co80B20合金的相稳定性

本文研究常压至770kbar压力范围内,非晶Co₈₀B₂₀合金所形成的结晶相的结构,并与Fc-B非晶合金进行比较。 关键词：     

Effect of pressure on the Néel temperature and the lattice parameter of MnTe

The Néel temperature of MnTe has been measured at high pressures up to 70 kbar and found to increase with pressure. The rate of increase changes discontinuously near 40 kbar. The lattice parameters were measured by X-ray diffraction techniques, and also change anomalously near 40 kbar. From these results, it appears that some kind of magnetic phase transition occurs at this point. A magnetic phase diagram is proposed.     

Polyamorphism of ice at low temperatures from constant-pressure simulations

We report results of molecular dynamics simulations of amorphous ice in the pressure range 0-22.5 kbar. The high-density amorphous (HDA) ice prepared by compression of Ih ice at T=80 K is annealed to T=170 K at intermediate pressures in order to generate relaxed states. We confirm the existence of recently observed phenomena, the very high-density amorphous ice, and a continuum of HDA forms. We suggest that both phenomena have their origin in the evolution of the network topology of the annealed HDA phase with decreasing volume, resulting at low temperatures in the metastability of a range of densities.