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Wavelength Dependence of Production of Multicharged Carbon Ions in Nanosecond Intense Laser Ionization of Seeded Benzene Beam
Niu Dongmei1,2, Liang Feng1,2, Luo Xiaolin1,2, Wen Lihua1,2, Zhang Xixian1,2, Li Haiyang*1,3
1.Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031;2.Graduate School of the Chinese Academy of Sciences,Beijing 100039;3.Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023
Abstract:
The photoionization of seeded benzene beam by 25 ns laser pulse at wavelengths of 266,355 and 1064 nm has been studied by the time-of-flight mass spectrometry. The observed mass spectra at 266 nm and 355 nm at intensities of 1010-1011 W/cm2 indicate a multiphoton ionization and dissociation(MPID)process,in which C+,C2Hx+,C3Hx+,C4Hx+ and C6H6+ are main products. While at 1064 nm laser of similar intensities,the domain ion is C4+ which is produced from Coulomb explosion. The longer wavelength facilities the energy absorption rate during inverse bremsstrahlung,which leads to the resulting wavelength dependence of the multicharged atomic ions.
Key words:  Benzene,Coulomb explosion,Multicharged atomic ions,Time of flight mass spectrometry
FundProject:
纳秒强激光电离苯产生高价碳离子的波长效应
牛冬梅1,2, 梁峰1,2, 罗晓琳1,2, 温丽华1,2, 张西咸1,2, 李海洋*1,3
1.中国科学院安徽光学精密机械研究所,合肥 230031;2.中国科学院研究生院,北京 100039;3.中国科学院大连化学物理研究所,大连 116023
摘要:
关键词:    库仑爆炸  高价原子离子  飞行时间质谱
DOI:10.1088/1674-0068/17/4/375-377
分类号: