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|Type:||Artigo de periódico|
|Title:||Multiple ionization of rare gas atoms irradiated with intense VUV radiation|
de Castro, ARB
|Abstract:||The interaction of intense vacuum-ultraviolet radiation from a free-electron laser with rare gas atoms is investigated. The ionization products of xenon and argon atomic beams are analyzed with time-of-flight mass spectroscopy. At 98 nm wavelength and similar to10(13) W/cm(2) multiple charged ions up to Xe6+ (Ar4+) are detected. From the intensity dependence of multiple charged ion yields the mechanisms of multiphoton processes were derived. In the range of similar to10(12)-10(13) W/cm(2) the ionization is attributed to sequential multiphoton processes. The production of multiple charged ions saturates at 5-30 times lower power densities than at 193 and 564 nm wavelength, respectively.|
|Editor:||American Physical Soc|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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