| Generation of multiple charged ions: Photoemission electron impact ionization |
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| 作者姓名： | 王利 李海洋 白吉玲 吕日昌 |
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| 作者单位： | State Key Laboratory of Molecular Reaction Dynamics，Dalian Institute of Chemical Physics，Dalian 116023，China |
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| 基金项目： | ProjectsupportedbytheNationalNaturalScienceFoundationofChina (GrantNo .2 935 30 0 2 ) |
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| 摘 要： | Ｔｉｍｅ＿ｏｆ＿ｆｌｉｇｈｔｍａｓｓｓｐｅｃｔｒｏｍｅｔｅｒ(ＴＯＦＭＳ)ｈａｓｂｅｅｎｆｉｎｄｉｎｇａｎｉｎｃｒｅａｓｉｎｇｌｙｗｉｄｅｖａｒｉｅｔｙｏｆａｐｐｌｉｃａｔｉｏｎｓ.Ｉｔｓｓｅｎｓｉｔｉｖｉｔｙ,ｈｉｇｈａｎａｌｙｓｉｓｓｐｅｅｄ,ａｎｄｌａｒｇｅｍａｓｓｒａｎｇｅｍａｋｅｉｔｏｎｅｏｆｔｈｅｍｏｓｔｆａｖｏｒａｂｌｅｍａｓｓｓｐｅｃｔｒｏｍｅｔｅｒｔｅｃｈｎｉｑｕｅ.Ｈｏｗｅｖｅｒ,ｔｈｅｋｅｙｆａｃｔｏｒｆｏｒｔｈｅＴＯＦＭＳｉｓｔｈｅｐｕｌｓｅｄｉｏｎｉｚｏｒｔｈａｔｒｅｓｔｒｉ…
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| 收稿时间： | 27 February 1998 |
Generation of multiple charged ions: Photoemission electron impact ionization |
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| Li Wang,Haiyang Li,Jiling Bai,Richang Lü.Generation of multiple charged ions: Photoemission electron impact ionization[J].Science in China(Chemistry),1998,41(5):525-534. |
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| Authors: | Li Wang Haiyang Li Jiling Bai Richang Lü |
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| Institution: | (1) State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, 116023 Dalian, China |
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| Abstract: | Delayed pulsed electric field was used to investigate the generation mechanism of multiple charged ions produced in the interaction of laser, metal surface and electric field on time_of_flight mass spectrometer (TOF MS). A special photoelectron generator was designed to control the energy and timing of the photoelectron beam. This modification made it possible to separate the photoionization process from photoelectron impact ionization. The experiment showed that the multiple charged ions could be produced only by the photoelectron impact, ionized step by step. A design of dual ionization configuration was presented, which could be used to study either multiphoton ionization or photoemission electron impact ionization. |
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| Keywords: | multiple charged ions photoemission electron electron impact ionization time_of_flight mass spectrometer |
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