光子

The messenger of the electromagnetic force is the photon with zero mass; the weak force that accounts for radioactive disintegration and causes the sun and the stars to shine is carried by the heavy W and Z boson particles; while the strong force is carried by gluon particles, which see to it that the atom nuclei hold together.

电磁力的信使是零质量的光子，弱作用力可以用来说明辐射衰变和太阳和恒星发光，其信使是重W和Z玻色子。

The γ-ray source is radioactive isotope of 241 Am which has the emission energy 59.5keV.

射线源为同位素241Am，它发出的光子能量是59.5keV。

It was independent of the methods based on radiometric source or detectors.

为提高定标精度，提出一种基于相关光子的光辐射定标方法，它是一种独立于基于辐射源和基于探测器的定标方法。

Objective To investigate the differential diagnosis value of 1H magnetic resonance spectroscopy (1H-MRS) and (superscript 99m)Tc-methoxy isobutyl isonitrile single photon emission computed tomography on postradiotherapy relapse and radionecrosis. Methods 1H-MRS and SPECT were performed in all 35 cases.

目的 探讨质子磁共振波谱(1H-MRS)和99mTc-甲氧基异丁基异腈单光子发射计算机断层显像对脑肿瘤患者放疗后复发与放射性坏死的鉴别诊断作用。

The photon infrared detectors for temperature detection of the railroad car axle are applied in many high-speed domestic railways.

本室研制的用于火车轴温探测的光子型红外探测器已经在国内高速铁路上得到较为广泛的应用。

Some of the energy intended for the photon is drained off by the recoiling atom.

原来给予光子的能量有一部分为反冲原子所消耗。

Recordation and reappearance for spatial information by photons.

光子对周期性空间信息的记忆与再现。

The process can be visualized as a wavefront being reflected back and forth between the two ends of the laser, picking up more photons with each reflection.

这过程可以想象波阵面在两个激光终端来回反射，伴随每一次反射集聚更多的光子。

Nonlinear refractivity and two-photon absorption of GaP are obtained by numerical fitting the experimental results.

通过数值拟合获得了磷化镓在飞秒激光脉冲作用下的非线性折射率和双光子吸收系数。

The calculated results indicated central wavelength of impurity mode and whole forbidden band move towards shortwave when incidence angles increase. Remotion of impurity mode of P-wave consist with that of S-wave basically.

研究结果表明，杂质模的中心波长及整个光子禁带随入射角的增加逐渐向短波方向移动，P偏振光和S偏振光的杂质模的移动情况基本一致。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。