查询词典 spontaneous emission

Moreover, the different behavior of particle emission with temperature stemming from different ρf vanishes when excitation energy replaces temperature.

除此之外，由于不同冻结密度而引起的不同粒子发射产额的温度相关性，也随着激发能的应用，出现了几乎一致的激发能依赖性。

The fluorescence excitation and emission wavelengths are 333 nm and 390 nm, respectively.

激发和发射波长分别为333 nm和390 nm。

The excitation and emission spectra of samples are investigated.

本文研究了荧光粉的激发光谱和发射光谱。

Both cases are acompanied by the light-emission from the transition from higher excited-state to lower excited-state, and the total superfluous band energy of nuclear system is released by means of excited element, and an energy level appears in the ground-state band, which signifies a quantum phase transition.

基于微观IBM理论，提出转动诱导出玻色子量子相变的一种可能途径：一旦原子核在受到高能激发或作快速旋转时，假如外界提供的能量足以使玻色子完成拆对顺排，则核处于集体相与单粒子态的共存相，其特征是出现较密集的能谱；假如能量不足以完成拆对或顺排，可能发生两种情况之一，当核旋转达到某个临界转动频率ω c时，或者一个高角动量的玻色子脱离"集体"而"游离"出来，或者发生一个高角动量的玻色子转变为一个低角动量的玻色子，核仍旧处于集体相；均会伴随出现光辐射，产生基态带的一条能级——相变信号。

At Er~(3+) doping concentration range 0.1-1.5 mol%, Er~(3+) first arrived at ~4F_(7/2) energy level by excited state absorption, then rapidly relaxed to ~2H_(11/2) and ~4S_(3/2) energy levels, the population of which increased, the remarkable upconversion green emission was obtained when Er~(3+) directly went back to ground state by radiative transition.

Er~(3+)浓度在0.1-1.5 mol％时，Er~(3+)通过激发态吸收跃迁到~4F_(7／2)能级，后迅速无辐射弛豫到~2H_(11／2)、~4S_(3／2)能级，~2H_(11／2)和~4S_(3／2)能级上Er~(3+)的布居数增多，Er~(3+)直接辐射跃迁回基态，上转换发射以绿光为主。

Some characteristic emission of neutral atoms in excited state are identified.

在分析光谱的基础上定性分析和确定了材料中的元素。

Before gained the stable field emission state,the excited process was observed and this phenomenon was explained.

观察到在获得稳定的场发射性能之前存在激发过程，并对其作了简单解释。

We found compound 35 exhibited charge transfer fluorescence, but 36 showed the major emission from local excited state.

我们发现化合物(35)有电荷转移的放光产生，而化合物(36)主要的放光则来自於区域性的激态。

A scentist from Exeter university said that even those who have a sense of environmental protection and a knowledge of the impact of the carbon emission are not willing to do it.

Exeter大学的科学家说，即使是那些最具有环保意识，了解航空碳排放量的影响的人，也不愿意减少他们乘飞机旅行的次数。

Appling exhaust gas recirculation system to diesel is one of the most effective measures to reduce the emission of NO.

废气再循环技术是解决柴油机NO排放的有效措施之一。

The use of the web to spread fears that flicking the switch on the LHC could create a Black Hole that could swallow up the Earth particularly concerned him, he said.

他说，使用互联网散布恐慌说启动LHC会生成一个可能吞噬地球的黑洞的做法让他感到忧虑。

Not a single word have I written down.

我一个字也没有写下来。