Charging and ion ejection dynamics of large helium nanodroplets exposed to intense femtosecond soft X-ray pulses
Charging and ion ejection dynamics of large helium nanodroplets exposed to intense femtosecond soft X-ray pulses
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暴露于强飞秒软 X 射线脉冲的大氦纳米滴的充电和离子喷射动力学
DOI:
10.1140/epjs/s11734-021-00280-0
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Ferguson, Ken R.
中科院分区:
文献类型:
--
作者:
Saladrigas, Catherine A.;Feinberg, Alexandra J.;Ziemkiewicz, Michael P.;Bacellar, Camila;Bucher, Maximilian;Bernando, Charles;Carron, Sebastian;Chatterley, Adam S.;Decker, Franz-Josef;Ferguson, Ken R.
Ion ejection from charged helium nanodroplets exposed to intense femtosecond soft X-ray pulses is studied by single-pulse ion time-of-flight (TOF) spectroscopy in coincidence with small-angle X-ray scattering. Scattering images encode the droplet size and absolute photon flux incident on each droplet, while ion TOF spectra are used to determine the maximum ion kinetic energy,, offragments (j = 1–4). Measurements spandroplet sizes betweenand(radii= 78–578 nm), and droplet charges betweenande/atom. Conditions encompass a wide range of ionization and expansion regimes, from departure of all photoelectrons from the droplet, leading to pure Coulomb explosion, to substantial electron trapping by the electrostatic potential of the charged droplet, indicating the onset of hydrodynamic expansion. The unique combination of absolute X-ray intensities, droplet sizes, and ionon an event-by-event basis reveals a detailed picture of the correlations between the ionization conditions and the ejection dynamics of the ionic fragments. The maximumof Heis found to be governed by Coulomb repulsion from unscreened cations across all expansion regimes. The impact of ion-atom interactions resulting from the relatively low charge densities is increasingly relevant with less electron trapping. The findings are consistent with the emergence of a charged spherical shell around a quasineutral plasma core as the degree of ionization increases. The results demonstrate a complex relationship between measured ionand droplet ionization conditions that can only be disentangled through the use of coincident single-pulse TOF and scattering data.
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影响因子:
8.6
作者:
D. Rupp;L. Flückiger;M. Adolph;T. Gorkhover;M. Krikunova;J. P. Müller;M. Müller;T. Oelze;Y. Ovcharenko;B. Röben;M. Sauppe;S. Schorb;D. Wolter;R. Mitzner;M. Wöstmann;S. Roling;M. Harmand;R. Treusch;M. Arbeiter;T. Fennel;C. Bostedt;T. Möller
通讯作者:
T. Möller
DOI:
10.1063/4.0000006
发表时间:
2020-05
期刊:
Structural Dynamics
影响因子:
--
作者:
D. Rupp;L. Flückiger;M. Adolph;A. Colombo;T. Gorkhover;M. Harmand;M. Krikunova;J. P. Müller;T. Oelze;Y. Ovcharenko;M. Richter;M. Sauppe;S. Schorb;R. Treusch;D. Wolter;C. Bostedt;T. Möller
通讯作者:
D. Rupp;L. Flückiger;M. Adolph;A. Colombo;T. Gorkhover;M. Harmand;M. Krikunova;J. P. Müller;T. Oelze;Y. Ovcharenko;M. Richter;M. Sauppe;S. Schorb;R. Treusch;D. Wolter;C. Bostedt;T. Möller
影响因子:
8.6
作者:
Bostedt, C.;Thomas, H.;Moeller, T.
通讯作者:
Moeller, T.
DOI:
10.1088/0953-4075/43/19/194012
发表时间:
2010
期刊:
Journal of Physics B: Atomic, Molecular and Optical Physics
影响因子:
--
作者:
U. Saalmann
通讯作者:
U. Saalmann
DOI:
10.1088/0953-4075/42/13/134018
发表时间:
2009
期刊:
Journal of Physics B: Atomic, Molecular and Optical Physics
影响因子:
--
作者:
H. Thomas;C. Bostedt;M. Hoener;E. Eremina;H. Wabnitz;T. Laarmann;E. Plönjes;R. Treusch;A. R. B. D. Castro;T. Möller
通讯作者:
T. Möller