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全无机非铅金属卤化物双钙钛矿因其独特的自限激子发光，在LED照明显示和光电探测等领域受到了广泛关注。然而，由于材料的间接带隙或直接带隙的宇称禁戒跃迁特性，这类双钙钛矿通常表现出较低的光致发光量子效率。离子掺杂是调控双钙钛材料光电性能的有效手段，但目前国内外对掺杂双钙钛矿的基础发光物理特别是自限激子的超快激发态动力学过程缺乏深入研究。
Neutron-gamma discrimination of CsI(Na) crystals for dark matter searches
Neutron-gamma discrimination CsI(Na) crystals dark matter
2011/4/7
Neutron-gamma discrimination of CsI(Na) crystals for dark matter searches 。
Incommensurate spin-density wave and multiband superconductivity in Na$_{x}$FeAs as revealed by nuclear magnetic resonance
Incommensurate spin-density wave multiband superconductivity nuclear magnetic resonance
2010/11/18
We report a 23Na and 75As nuclear magnetic resonance (NMR) investigation of NaxFeAs series
(x = 1, 0.9, 0.8) exhibiting a spin-density wave (SDW) order below TSDW = 45, 50 and 43 K for
x = 1, 0.9, 0...
Laser control of complete vibrational transfer in Na$_2$ using resonance coalescence
Laser resonance coalescence
2010/11/17
With a specific choice of laser parameters resulting into a so-called exceptional point in the wavelength-intensity plane, it is possible to produce the coalescence of two Floquet resonances describi...
Intercalation of a Nonionic Surfactant (C10E3) bilayer into a Na-Montmorillonite Clay
Intercalation of a Nonionic Surfactant (C10E3) bilayer Na-Montmorillonite Clay
2010/11/23
A nonionic surfactant, the tri-ethylene glycol mono n-decyl ether (C10E3), characterized by its lamellar phase state, was introduced in the interlayer of a Na-montmorillonite clay at several concentra...
Comparison of the hydrodynamic and Dirac models of the dispersion interaction between graphene and H, He${}^{\ast}$, or Na atoms
Comparison the hydrodynamic Dirac models the dispersion interaction between graphene
2010/10/29
The van der Waals and Casimir-Polder interaction of different atoms with graphene is investigated using the Dirac model which assumes that the energy of quasiparticles is linear with respect to the mo...
高斯激光驻波场沉积Na原子的量子理论分析
量子理论 原子光刻 薄透镜模型
2009/8/14
利用量子理论,通过CRANK-NICOLSON数值方法对23Na原子受激光驻波场作用的物理过程进行模拟.模拟结果表明:正失谐时,原子以λ/2为周期会聚在驻波光场中波节处.随着光势阱加深或原子纵向速度改变,原子会聚结果分别符合薄透镜、厚透镜及沟道化模型.厚透镜模型中,当原子纵向速度增加,原子密度峰位置沿z方向向后漂移,峰在z方向半高宽增加.当激光功率增加或激光束腰减小,会聚面上峰半高宽减小,对比度增...
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...
为满足核物理实验测量的需要,我们设计制备了~(124)Sb-Be,,~(24)Na-D_2O,~(24)Na-Be球形光中子源,这种源的源强的角分布近于各向同性。下面简述中子源强度的估算及其结构,各向异性的测量和中子能谱的计算。 一、光中子源的强度估算及其结构
用中子活化分析法对制造器件用的半导体硅中Na,Cu,Au含量的分析
半导体硅 制造器件 中子活化分析法
2008/12/23
本文介绍了用作器件的半导体硅片表面和本体中Na,Cu,Au含量的堆中子活化分析方法。给出了探测极限。除了常用的“相对比较法”外,着重介绍了“代用标准法”。为了适应常规分析的要求,我们以铁丝作Cu和Na的代用标准,使照后的标准处理摆脱了放射性溶液操作。
Asphericity in the Fermi Surface and Fermi Energy of Na-K,
Na-Rb and Na-Cs Binary Alloys
asphericity in the Fermi surface Fermi energy pseudopotential
exchange and correlation effects binary alloys
2007/8/15
2002Vol.38No.3pp.365-369DOI:
Asphericity in the Fermi Surface and Fermi Energy of Na-K,
Na-Rb and Na-Cs Binary Alloys
Minal H. Patel, A.M. Vora, P.N. Gajjar, and A.R. Jani
...
Collisional Quantum Interference on Rotational Energy Transfer: Relation Between Integral Interference Angle and Rotational Quantum Number in
Na2-Na System
rotational energy transfer interference angle rotational quantum number
2007/8/15
2006Vol.46No.1pp.123-129DOI:
Collisional Quantum Interference on Rotational Energy Transfer: Relation Between Integral Interference Angle and Rotational Quantum Number in
Na2-Na System
...
Electrical Resistivity of Liquid Alkali Na-based Binary Alloys
Pseudopotential Electrical Resistivity Alkali Na-based liquid binaries
2010/4/9
The study of the electrical resistivity rL of alkali Na-based binary alloys Na1-xLix, Na1-xKx, Na1-xRbx and Na1-xCsx have been made by well-recognized model potential of Gajjar et al. The most recent ...