| Original Articles |
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X-Ray and Extreme Ultraviolet Emission from Small-Sized Kr Clusters Irradiated by 150-fs Laser Pulses |
| WANG Qi;CHENG Yuan-Li;ZHAO Yong-Peng;XIA Yuan-Qin;CHEN Jian-Xin;XIAO Yi-Fan |
| National Key Laboratory of Tunable Laser Technology, Harbin
Institute of Technology, Harbin 150001 |
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| Cite this article: |
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WANG Qi, CHENG Yuan-Li, ZHAO Yong-Peng et al 2003 Chin. Phys. Lett. 20 1309-1311 |
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Abstract X-ray and extreme ultraviolet (EUV) emission from Kr clusters irradiated by 150-fs laser pulses at the peak laser intensity of 5 x 1015W/cm2 was experimentally investigated. Strong transitions (10 nm-13 nm) from Kr X and Kr IX were observed and some spectral lines from Kr XIII and Kr XIV, which have been predicted to be not produced by optical-field-ionization at the laser intensity used, also appeared. The laser energy absorption and the intensity of x-ray emission started to grow remarkably above the backing pressure of 0.5 MPa and to decrease at the backing pressure of 3 MPa. It is suggested that an optimum backing pressure may exist for Kr clusters heated by 150 fs laser pulses at a certain laser intensity to produce x-ray emission.
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| Keywords:
52.50.Jm
52.25.Nr
36.40.Gk
36.40.Mr
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Published: 01 August 2003
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| PACS: |
52.50.Jm
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(Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.))
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52.25.Nr
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36.40.Gk
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(Plasma and collective effects in clusters)
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36.40.Mr
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(Spectroscopy and geometrical structure of clusters)
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