Ionization dynamics of XUV excited clusters: the role of inelastic electron collisions
Ionization dynamics of XUV excited clusters: the role of inelastic electron collisions
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DOI：
10.1088/0953-4075/48/17/174002
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发表时间：
2015-07
期刊：
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通讯作者：
M. Müller;L. Schroedter;T. Oelze;L. Nösel;A. Przystawik;A. Kickermann;M. Adolph;T. Gorkhover;L. Flückiger;M. Krikunova;M. Sauppe;Y. Ovcharenko;S. Schorb;C. Bostedt;D. Rupp;T. Laarmann;T. Möller
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文献类型：
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作者：
M. Müller;L. Schroedter;T. Oelze;L. Nösel;A. Przystawik;A. Kickermann;M. Adolph;T. Gorkhover;L. Flückiger;M. Krikunova;M. Sauppe;Y. Ovcharenko;S. Schorb;C. Bostedt;D. Rupp;T. Laarmann;T. Möller
我们报道了在短波长的自由电子激光的强短脉冲照射下，小氙簇的电离和纳米等离子体动力学。荧光光谱分析表明，非弹性电子碰撞在最高电荷态的形成中起着重要作用。从光谱分布推断出27 eV的电子温度，对应于从单个原子电离但被困在团核中的俄歇电子和光电子的平均过剩能量。这表明荧光光谱反映了纳米等离子体动力学的一个非常早期的阶段，并显示了被困在簇势中的等离子体电子的一部分动能是如何转移到离子上的。
We report on the ionization and nanoplasma dynamics of small xenon clusters irradiated by intense, short pulses of a short-wavelength free-electron laser. Fluorescence spectroscopy indicates that inelastic electron collisions play a prominent role in the formation of the highest charge states. From the spectral distribution an electron temperature of 27 eV is deduced which corresponds to the average excess energy of the Auger- and photoelectrons ionized from individual atoms but trapped in the cluster core. This suggests that fluorescence spectra reflect a very early stage within the nanoplasma dynamics and shows how a part of the kinetic energy of the plasma electrons trapped in the cluster potential is transferred to the ions.