搜索结果: 1-15 共查到“物理学 Ca”相关记录27条 . 查询时间(0.054 秒)
Anisotropic $H_{c2}$ determined up to 92 T and the signature of multi-band superconductivity in Ca$_{10}$(Pt$_{4}$As$_{8}$)((Fe$_{1-x}$Pt$_{x}$)$_{2}$As$_{2}$)$_{5}$ superconductor
Anisotropic signature multi-band superconductivity superconductor
2012/2/27
The upper critical fields, $H_{c2}$($T$), of single crystals of the superconductor Ca$_{10}$(Pt$_{4-\delta}$As$_{8}$)((Fe$_{0.97}$Pt$_{0.03}$)$_{2}$As$_{2}$)$_{5}$ ($\delta$ $\approx$ 0.246) are deter...
A combined high-pressure experimental and theoretical study of the electronic band-structure of scheelite-type AWO4 (A = Ca, Sr, Ba, Pb) compounds
high-pressure experimental theoretical study the electronic band-structure scheelite-type AWO4
2011/8/17
Abstract: The optical-absorption edge of single crystals of CaWO4, SrWO4, BaWO4, and PbWO4 has been measured under high pressure up to ~20 GPa at room temperature. From the measurements we have obtain...
The coupled-channels technique is applied to analyze recent fusion data for 48Ca+48Ca. The
calculations include the excitations of the low-lying 2+, 3− and 5− states in projectile and tar...
Plasmons and Interband Transitions of Ca$_{11}$Sr$_3$Cu$_{24}$O$_{41}$ investigated by Electron Energy-Loss Spectroscopy
Plasmons and Interb Transitions
2010/11/24
Electron energy-loss spectroscopy studies have been performed in order to get a deeper insight
into the electronic structure and elementary excitations of the two - leg ladder system
Ca11Sr3Cu24O41....
General DFT++ method implemented with projector augmented waves: Electronic structure of SrVO$_3$ and the Mott Transition in Ca$_{2-x}$Sr$_{x}$RuO$_4$
General DFT++ method implemented projector augmented waves Mott Transition
2010/11/24
The realistic description of correlated electron systems has taken an important step forward a few years ago as the combination of density functional methods and the dynamical mean-field theory was co...
Phase diagram of iron-arsenide superconductors Ca(Fe1-xCox)2As2 (0 <= x <= 0.2)
Phase diagram of iron-arsenide superconductors
2010/11/19
Platelet-like single crystals of the Ca(Fe1-xCox)2As2 series having lateral dimensions up
to 15 mm and thickness up to 0.5 mm were obtained from the high temperature solution
growth technique using ...
Critical-doping universality for cuprate superconductors: Oxygen nuclear-magnetic-resonance investigation of Ca(x)La(1-x)Ba(1.75-x)La(0.25+x)Cu(3)O(y)
cuprate superconductors Oxygen nuclear-magnetic-resonance investigation
2010/11/18
The critical doping levels in cuprates, where the ground state changes its nature (from an an-
tiferromagnet to a spin glass to superconductor to metal), are not universal. We investigate the origin ...
Ca@C88和Ca@C90的合成、分离和表征
富勒烯金属包合物 钙 吸收光谱
2009/11/26
利用直流电弧法,合成了含钙的富勒烯金属包合物.通过多步高效液相色谱（HPLC）法,首次分离出含钙的富勒烯金属包合物Ca@C88和Ca@C90 (I,II),用激光解析飞行时间质谱(MAL-DI-TOF MS)和紫外-可见-近红外（UV-Vis-NIR） 光谱进行了表征,并对其分子对称性和电子结构进行了讨论.
采用固相法制备了绿色LiM(M=Ca, Sr, Ba)BO3∶Tb3+发光材料。测量结果显示材料均可被紫外(350～410 nm)光激发，发射绿光。研究了Tb3+浓度对材料发射光谱的影响，结果显示，随Tb3+浓度的增大，发射光谱峰位未发生变化，但其强度呈现出先增大后减小的趋势，即：存在浓度猝灭效应。加入电荷补偿剂Li+，Na+和K+提高了LiM(M=Ca, Sr, Ba)BO3∶Tb3+材料的发射...
Influences of the change of neutron number on the charge form factors of Ca and Ni isotopes
Ca isotopes Ni isotopes elastic electron scattering charge form factor relativistic eikonal approximation
2009/8/14
We calculate the charge form factors of the even-even isotopes on the Z=20 and 28 isotopic chains, including both the stable nuclei and unstable ones, and investigate the influences of the change of n...
π±和K±介子在Ca原子核上的非弹性散射
非弹性散射 Ca原子核 π± K±介子
2009/8/13
用KMT多次散射展开的一级顶项和程函扭曲波冲量近似, 并采用拟合电子非弹性散射实验的跃迁密度, 研究了正负π介子在Ca核上的非弹性散射, 同时预言了K±介子在Ca上的非弹性散射.
LHC高能Pb—Pb和Ca—Ca碰撞中的直接硬光生J/ψ及γ
光生过程 等效光子谱 J/ψ及γ产生
2009/7/10
研究了LHC中,Pb–Pb以质心系能量5.5ATeV以及Ca–Ca以质心系能量7ATeV碰撞过程中的硬直接光生J/ψ和γ过程:A+A→A+J/ψ(γ)+X.结果表明该过程不仅可用于测量原子核中的胶子分布,还可以用以研究大Rt胶子以及重夸克的J/ψ碎裂机制.
N+(N=Li, Na, K)对发光材料M3(M=Ca, Sr, Ba)Y2(BO3)4∶Eu3+光谱的影响
M3(M=Ca,Sr,Ba)Y2(BO3)4∶Eu3+ 发射光谱 激发光谱 Li+ Na+ K+
2009/5/11
采用高温固相反应方法在空气中制备了M3(M=Ca, Sr, Ba)Y2(BO3)4∶Eu3+红色发光材料，测量结果显示，材料的主发射峰均位于613 nm处，监测613 nm发射峰时，所得材料的激发光谱相同。研究了Li+,Na+和K+对M3(M=Ca, Sr, Ba)Y2(BO3)4∶Eu3+材料激发与发射光谱的影响，结果显示，加入Li+,Na+和K+后，M3(M=Ca, Sr, Ba)Y2(BO3...
纳米级ASnO3(A=Ca, Sr, Ba)∶Eu的光谱研究
纳米 ASnO3∶Eu 发光
2009/4/29
采用络合溶胶-凝胶法制备出系列纳米级发光材料ASnO3(A=Ca, Sr, Ba)∶1%Eu。并采用X射线衍射(XRD)、紫外光谱(UV-Vis)、透射电镜(TEM)、荧光光谱(PL)对所制备的纳米发光粉体进行表征。结果表明：所合成的物质均为具有确定结构的单一物相，并从结构上分析了其发光性质随碱土金属离子半径变化而变化的规律。