scholarly journals Multiphoton ionization of cesium atoms above and below the two-photon ionization threshold

1984 ◽  
Author(s):  
A. Dodhy ◽  
J. A. D. Stockdale ◽  
R. N. Compton
Keyword(s):  
Multiphoton Ionization ◽  
Ionization Threshold ◽  
Two Photon ◽  
Photon Ionization ◽  
Cesium Atoms

scholarly journals Two-Color Two-Photon Ionization Spectrum of Pyrene in N-Hexane

1997 ◽  
Vol 17 (1) ◽  
pp. 19-28 ◽  
Author(s):  
Keiji Nakashima ◽  
Hirofumi Soga ◽  
Teiichiro Ogawa
Keyword(s):  
Polar Solvent ◽  
Dye Laser ◽  
Ionization Threshold ◽  
Excitation Energies ◽  
Ionization Technique ◽  
Two Photon ◽  
Photoionization Process ◽  
Photon Ionization ◽  
Ionization Spectrum ◽  
Near Threshold

The photoionization process of pyrene in non-polar solvent has been investigated using a two-color two-photon ionization technique. The ionization spectrum near threshold of pyrene in n-hexane was measured by a delayed irradiation of a dye laser 20 ns after an N2 laser at total excitation energies of 5.9–6.22 eV. The two-photon ionization threshold of pyrene was in the vicinity of 5.9 eV which is larger by 0.7 eV than that expected from the onset of one-photon ionization. The ionization spectrum shows maxima at 5.92 and 5.99 eV which may be assigned to an autoionization process.

Photoelectron angular distributions from two-photon ionization of atoms near ionization threshold

2011 ◽  
Vol 9 (1) ◽  
pp. 010203-10206 ◽  
Author(s):  
白丽华 Lihua Bai ◽  
刘宇恒 Tingting Cui ◽  
崔婷婷 Yuheng Liu ◽  
王燕 Yan Wang ◽  
邓冬梅 Dongmei Deng ◽  
...  
Keyword(s):  
Ionization Threshold ◽  
Angular Distributions ◽  
Two Photon ◽  
Photon Ionization ◽  
Photoelectron Angular Distributions

Detection of Atmospheric Pollutant NO With the Method of Resonant-Enhanced Multiphoton Ionization

2012 ◽  
Vol 209-211 ◽  
pp. 1596-1599
Author(s):  
Gui Yin Zhang ◽  
Yi Dong Jin ◽  
Hai Ming Zheng
Keyword(s):  
Decay Curve ◽  
Resonant State ◽  
Multiphoton Ionization ◽  
Photon Absorption ◽  
Ionization Cross ◽  
Atmospheric Pollutant ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Photon Ionization ◽  
Key Substances

NO is one of the key substances of air pollution. This paper presents the use of the technique of resonant enhanced multi-photon ionization (REMPI) for NO ambient detection. NO is ionized by absorbing four photons and via A2Σ intermediate resonant state when use 452.4nm laser as radiation source. A physical model concerning the ionization process is presented. It is shown that the ion signal depends on laser character and the dynamic parameters of NO. Two-photon absorption and ionization cross section about the resonant state are obtained from the ion decay curve and the model. The detection limit of this work, which can reach 1.4 ppm, is determined by measuring the variation of the ion signal with the concentration of NO.

Two-Photon Ionization of Excited Cesium Atoms by Ruby Laser Light

1978 ◽  
Vol 45 (1) ◽  
pp. 244-246 ◽  
Author(s):  
Toshihiko Ohno ◽  
Takayoshi Okuda ◽  
Jun Yamada
Keyword(s):  
Ruby Laser ◽  
Laser Light ◽  
Two Photon ◽  
Photon Ionization ◽  
Cesium Atoms
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