Unusual under-threshold ionization of neon clusters studied by ion spectroscopy
Unusual under-threshold ionization of neon clusters studied by ion spectroscopy
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DOI：
10.1088/0953-4075/46/16/164023
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发表时间：
2013-08-28
影响因子：
1.6
通讯作者：
Ohashi, H.
中科院分区：
文献类型：
--
作者：
Nagaya, K.;Sugishima, A.;Ohashi, H.
我们对氖原子团簇进行了飞行时间质谱研究，这些团簇被波长为62 nm的强自由电子激光脉冲辐照，引起了氖原子从基态（2s（2）2 p（6））到激发态（2s（2）2 p（5）nl）的光学跃迁。与孤立Ne原子双光子吸收产生的Ne ~+离子不同，Ne团簇产生的Ne ~+离子产额与激光强度（I）呈线性关系。我们讨论的电离机制，使线性行为相对于我和预期的功能，在电子发射光谱。
We carried out time-of-flight mass spectrometry for neon clusters that were exposed to intense free electron laser pulses with the wavelength of 62 nm, which induce optical transition from the ground state (2s(2) 2p(6)) to an excited state (2s(2) 2p(5) nl) in the Ne atoms. In contrast to Ne+ ions produced by two-photon absorption from isolated Ne atoms, the Ne+ ion yield from Ne clusters shows a linear dependence on the laser intensity (I). We discuss the ionization mechanisms which give the linear behaviour with respect to I and expected features in the electron emission spectrum.