alpha particle

noun

1. *α粒子
   the nucleus of a helium atom; a particle with a positive electrical charge passing through it, that is produced in a nuclear reaction

1. Thus the alpha particle is an exceptionally stable nuclear structure.
   由此可见，α粒子是一种特别稳定的核结构。
2. So basically he's trying to put some atoms in the way of the alpha particle.
   把一些原子，放在alpha粒子的路径上。
3. Type of radioactive disintegration ( see radioactivity) in which some unstable atomic nuclei dissipate excess energy by spontaneously ejecting an alpha particle.
   放射性蜕变的一类，某些不稳定原子核自发射出一个α粒子以耗散过剩能量。
4. The nature of the nuclear transformation could be firmly established: the aluminium atom, for example, captures the alpha particle and is transformed, after expelling the proton, into an atom of silicon.
   核蜕变的性质因此得到确立。例如，铝原子俘获。粒子，并在排出质子后蜕变成硅原子。
5. And there he was able to identify the alpha particle as the helium nucleus.
   他证实了，阿尔法粒子就是氦核。
6. This is the analogy to the alpha particle.
   这和阿尔法粒子类似。
7. Alpha and beta particle radiation is lower energy and can often be blocked by just a sheet of paper.
   α和β粒子辐射的能量较低，一页纸片便可以阻挡住它们。
8. Aluminium can be transformed, by the capture of an alpha particle and the emission of a proton, into a stable silicon atom.
   铝可以通过俘获。粒子、排出质子而被蜕变成一种稳定的硅原子。
9. These tools include the alpha particle X-ray spectrometer ( apxs), which measures elemental composition, and the Mars hand lens imager close-up camera, or Mahli.
   这些设备包括阿尔法粒子x光分光仪，其可以检测元素组成，以及火星手持透镜成像器近景摄像机，或简称mahli。
10. Effect of stochastic damping resonance wave packet on energetic alpha particle transport
    随机阻尼共振波包对高能α粒子输运的影响
11. Multiple inner-shell ionization of aluminum by proton and alpha particle
    P和α引起Al原子内壳层多电离的研究
12. Allowable effective alpha particle confinement time for FEB normal operation has been assessed from the power balance and alpha particle balance equations. The result is fairly consistent with that calculated directly from the experimental database.
    另外，从α粒子平衡方程和等离子体功率平衡方程出发得到的结果与直接从实验数据计算得到的结果相一致。
13. The Study of~( 16) O+~( 12) C Scattering by Alpha Particle Folding Model Optical Potential
    用α粒子折叠模型光学势研究～（16）O＋～（12）C散射
14. Comparison of the effect between Ni ion implantation and alpha particle irradiation in aluminum oxide is studied by using thermoluminescence.
    利用Al2O3晶体的热释光特征比较了镍离子注入与α辐射在晶体中的作用。
15. To test the stability of observation method of soil radon, three synthetic observation holes were set up in the garden of Beichuan Government. Three methods are RaA, alpha particle track measurement and radon pipe measurement.
    为了对比有关土氡观测的稳定性及观测结果的映震能力，在原北川县政府断层气观测场地内建立了三组综合观测孔，进行RaA法，氡管仪法和α径迹蚀刻法测试实验。
16. In addition, the survival rates of the cells in groups exposed to alpha particle irradiation followed by NNK administration were significantly lower than that of cells treated with NNK administration followed by alpha particle irradiation.
    此外还发现α粒子照射后NNK染毒的细胞存活率明显低于NNK染毒后α粒子照射组。
17. Track studies of in CR-39 detector for alpha particle
    CR&39探测器的α粒子径迹研究
18. Optimization for Growth of CVD Diamond on Al_2O_3 and Response to Alpha Particle Irradiation
    Al2O3陶瓷上金刚石膜生长工艺优化及α粒子响应
19. Preparation and properties of alpha particle tract detector
    α粒子径迹探测器的制备及其理化性能
20. The results showed that the lower the alpha particle's energy, the earlier the developing time of track.
    实验表明，α能量越低则径迹显现时间越短；
21. Relative gene in immortalized human fetal tracheal fibroblasts malignantly transformed by alpha particle irradiation
    α粒子诱发人胎气管永生化纤维细胞恶性转化相关基因的分析
22. Temperature is an important design parameter for experiments and operation in spacecraft and its payload systems. This paper introduces the CAN bus based distributed temperature measurement and control system for Alpha magnetic spectrometer, a particle physics detector which will be running at international space station.
    温度是有效载荷系统设计中的一个重要参数，针对空间粒子探测器阿尔法磁谱仪（AMS），介绍一种基于CAN总线的分布式有效载荷温度测控系统。
23. A Synergistic Toxic Effect in Mammalian Cells Induced by Co-treatment of Alpha Particle and Diesel Particulate Extract
    Alpha粒子和柴油机尾气颗粒提取物共同处理哺乳动物细胞的协同毒性作用
24. M-subshell ionization of th and u by alpha particle bombardment
    α粒子轰击钍和铀引起的M亚壳层电离
25. Alpha particle spectra and absolute neutron yields at the three directions were measured and compared.
    测量和比较了三个方向的α粒子谱和绝对中子产额。
26. The associated alpha particle will be used to define the neutron direction and the time when neutron was generated.
    这种中子管带有α粒子探测器，通过探测到的α粒子能给出与该α粒子伴生的14MeV中子产生时刻和飞出方向的指示信号。
27. Plasma features and alpha particle transport in LOW-ASPECT RATIO tokamak reactor
    低环径比托卡马克堆中等离子体特性及α粒子输运
28. An alpha particle thickness gauge by air equivalent method
    空气等效法α测厚仪
29. However, the relative short range of alpha particle and auger electron limits the energy deposited in surrounding cell.
    但α粒子和俄歇电子较短的射程限制了α核素和俄歇电子核素对周围细胞的交互作用。

noun

1. a positively charged particle that is the nucleus of the helium atom