难检字字典在线查询

汉语拼音：zì yóu diàn zǐ

金属导体中的自由电荷。金属原子的外层电子(价电子)脱离原子核束缚后而成为自由电子。铜的自由电子密度为85×1028米－3。各种金属的自由电子密度有相同的数量级。n型半导体中的多数载流子是自由电子。

自由电子 [zì yóu diàn zǐ]

1. 原子中的电子，脱离原子核的引力范围，而可在原子间自由运动，此种电子称为「自由电子」。自由电子的运动可引起电流。由于金属内部存在自由电子，因此为电的良导体。

• This is in addition to general absorption characteristic of the free electrons.

  这是附加在自由电子的普通吸收之上的.

• Pulses of radiation are emitted when free electrons in the gas are accelerated by passing ions.

  当气体中的自由电子被掠过的离子加速时,将发出辐射脉冲.

• The experiments were performed using the university's room - sized, free - electron laser.

  实验用到了大学里和房间差不多大小的自由电子激光器.

• The free electron gas is a kind of representative quantum Fermi gas.

  金属的自由电子气是一种典型的量子费米气体.

• The effect of divergence of the incident electron beam on the gain of FEL is analysed.

  分析了入射电子束的发散性对自由电子激光器增益的影响.

• This paper deals with the statistical properties about two dimensional photon gas and free electron gas.

  讨论了二维光子气体和自由电子气体的统计性质.

• As does the CRT, FED generates and shoots free electrons across a tube.

  FED像CRT那样, 也产生并把自由电子射过电子管.

• Ride received a doctorate in astrophysics and free electron laser physics from Stanford.

  莎莉在斯坦福大学获得天体物理学和自由电子激光物理的博士学位.

• The transverse model spectral method is widely applied to numerical simulations of FEL oscillators.

  横模谱方法广泛应用于自由电子激光振荡器数值模拟.

• Depending upon certain conditions there may ornot may be f ree elect rons in semi - conductors.

  半导体是否存在着自由电子,这取决于某些条件.

• There has been substantial theoretical interest in free - electron lasers ( FEL ) for the last decade.

  在过去10年对自由电子激光一直有着浓厚的研究兴趣.

• Thermal conduction in metals occurs like electrical conduction, through motions of free electrons.

  热量传导在金属里发生象电子传导, 通过自由电子的行动.

• In contrast, an electrically conductive substance has a great number of free electrons.

  相反, 导电物质有大量的自由电子.