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Generation of Multicharged Krypton Ions in Nanosecond Laser Ionization of Krypton Beam
Luo Xiaolin1, Kong Xianglei1, Niu Dongmei1, Qu Hongbo1, Li Haiyang*1,2
1.Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031;2.Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023
Abstract:
Up to Kr17 + multicharged krypton ions have been observed in time-of-flight mass spectrum by a 25 ns Nd-YAG 1. 064 μm laser at laser intensity about 1012 W/ cm2 . Experimental results indicate that the multicharged ions appear only when the laser interacts with the middle part of the pulsed beam,and the intensities of the multicharged ions increase dramatically by increasing the backing pressure of Kr gas,which indicates that the clusters in the beam is essential to the production of multicharged ions. From the experimental results,it is concluded that the cluster is ionized via multiphoton ionization and forms a nanoplasma ball,which can absorb the laser resonantly to further ionize the single charge ion to the high charge state.
Key words:  Krypton,Nanosecond laser,Multicharged ions,Time-of-flight mass spectrum
FundProject:
纳秒激光电离产生Kr17 + 的研究
罗晓琳a1, 孔祥蕾a1, 牛冬梅a1, 渠洪波a1, 李海洋*1,2
1.中国科学院安徽光学精密机械研究所,合肥 230031;2.中国科学院大连化学物理研究所,大连 116023
摘要:
关键词:    纳秒激光  高价离子  飞行时间质谱
DOI:10.1088/1674-0068/17/1/4-6
分类号: