Unusual under-threshold ionization of neon clusters studied by ion spectroscopy
- Nagaya, K.
- Sugishima, A.
- Iwayama, H.
- Murakami, H.
- Yao, M.
- Fukuzawa, H.
- Liu, X-J
- Motomura, K.
- Ueda, K.
- Saito, N.
- Foucar, L.
- Rudenko, A.
- Kurka, M.
- Kuehnel, K-U
- Ullrich, J.
- Czasch, A.
- Doerner, R.
- Feifel, Raimund
- Nagasono, M.
- Higashiya, A.
- Yabashi, M.
- Ishikawa, T.
- Togashi, T.
- Kimura, H.
- Ohashi, H.
Publication date
January 2013
DOI Publisher
Uppsala universitet, Molekyl- och kondenserade materiens fysik ISSN
0953-4075 Citation count (estimate)
8Abstract
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
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