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1) The gas is heated by photoionization.

2) The principle and performance of a home-made miniature photoionization ion trap mass spectrometer was introduced.

3) A liquid chromatography - photoionization - mass spectrometry method was developed for thedetermination of chloramphenicol antibiotics in fish meats.

4) Part of the difficulty is a process called photoionization, in which the high-energy photons conveying the x-rays strip away electrons from atoms within the accretion disk.

5) According to the detection demand of the weak photoionization signal, a new kind of data acquisition and processing system of photoionization signal is developed.

6) The integration of soft photoionization and ion trap mass spectrometer is specially fit for in - suit detection of VOCs and noxious gas. Thus, there will be a far-ranging market prospect.

7) According to the measurement demand of weak photoionization signal, a new kind of photoionization signal detection instrument is developed.

8) The photoionization efficiency curve and the partial optical oscillator strength densities for different fragments of CO was determined by this work.

9) The key part of photoionization detector is analyzed and designed. The principle, structure and characteristic of the system design is especially demonstrated.

10) The high laser intensity is needed in traditional photoionization which shows intensive Rabi oscillations of population.

11) The working principle and the hardware's core design of the system are introduced, which integrate gas photoionization detection, weak signal gathering, signal detection and data processing[sentencedict.com], etc.

12) The experimental and theoretical studies on the pulse preionization of high power CW CO2 laser are presented in this paper and the photoionization process ia emphersized.

13) A method of accurate measuring the absolute photoabsorption and photoionization cross sections has been introduced.

14) The results show that the presented technique can give the reasonable resonance structures very well in photoionization processes.

15) All the atomic and molecular systems are subject to photoionization and photodissociation.

16) For bound states,(http://sentencedict.com/photoionization.html) three-step autoionization detection method and direct photoionization detection method are employed.

17) The island-like clumps of dark clouds scattered across the nebula are nodules of dust and gas that are resisting being eaten away by photoionization.

18) In addition, some other isomers were identified by comparing observed photoionization efficiency spectra with simulated photoionization efficiency curves based on Franck-Condon factor analysis.

19) A series of free radicals and the neutral molecules were identified by measuring of photoionization mass spectrometry combined with photoionization efficiency spectra.

20) Selectively ionizing atoms(or molecule) can be easily performed by means of a multistep resonance photoionization technique.

21) In the second part, using the wave function and binding energy obtained from the first part, the photoionization cross-section of the impurity is calculated.

22) The using of chirped laser pulse can restrain the Rabi oscillations and realize high efficiency of photoionization.