1) particle-antiparticle quantum number
正反粒子量子数
2) particle-antiparticle quantum number-
正-反粒子量子数
3) positive and negative neutrino
正、反粒子
4) fungous particle
粒子数量
1.
The atmospheric fungous particle numbers in six functional districts were measured by the method of natural sedimentation in Taiyuan City.
用自然沉降法对太原市六个功能区大气真菌粒子的数量进行了测定，结果表明：太原市大气真菌粒子数量季节变化十分明显，夏季高冬季低；空间变化不十分明显，六个功能区由高至低的顺序为太行≈工办＞桃园＞一电＞长风＞上兰；一般每日出现一次高峰和一次低峰。
5) population inversion
反转粒子数
1.
In this paper we start from the rate equations describing a Q switched laser system with a saturable absorber and finally deduce the condition of this kind of Q switching which should be satisfied by the laser crystal population inversion.
本文从描述饱和吸收体调Ｑ的速率方程出发，推导实现有激发态吸收的饱和吸收体调Ｑ所需的反转粒子数理论上应满足的条件，并对其进行讨论与分析。
2.
The condition of this kind of Q-switching which should be satisfied by the laser crystal population inversion is deduced.
从描述饱和吸收体调Q的速率方程出发，推导出了实现有激发态吸收的饱和吸收体调Q所需的反转粒子数理论上应满足的条件，并对其进行了讨论与分析，与参考文献的相关叙述相符。
3.
The extraction efficiency and the distribution of population inversion in multi pass amplifier are calculated theoretically.
理论上计算了在多程放大过程中反转粒子数的利用效率、反转粒子数的分布等。
6) population inversion
粒子数反转
1.
Based on boltzmann distribution law,thermodynamic scale of temperature is discussed of three level laser working matter system in negative temperature state,realized population inversion.
从玻耳兹曼发布律出发，对处于负温度状态（即实现粒子数反转）的三能级激光工作物质系统的热力学温度进行了讨论，指出在负温度状态下，粒子系统的热力学温度仍可以大于零，证明了负温度状态并不等同于热力学温度Ｔ＜０的状态。
2.
94 μm, but only changes the relation between the population inversion of 4I 13/2 and 4I 15/2 levels and the concentration of Er 3+ ions.
６６μｍ波长激光粒子数反转，即Ｎ２（４Ｉ１３／２）＞Ｎ１（４Ｉ１５／２）与Ｅｒ３＋离子浓度的关系。
3.
The evolution properties of the field entropy and the population inversion in an interacting system of a coherent superposition state and a two-level atom are studied and compared with that of the coherent superposition state formed by the coherent state and vacuum state.
研究了压缩相干态和真空态构成的相干叠加态光场与二能级原子相互作用系统中场熵的演化特性及粒子数反转效应,并与相干态和真空态构成的相干叠加态光场的场熵特性及粒子数反转效应进行了比较。
补充资料：正反粒子对
物理学上由狄拉克方程预言每种微观粒子都存在有它的“反粒子”。举个例子，我们知道电子是带负电荷的，而人们在实验中也发现了正电子，正负电子就是一对正反粒子对。正反粒子一相遇就会发生湮灭，同归于尽。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条