Electron-impact induced fluorescence for EUV spectrometer–detector calibration

Knie, André; Burbank, Nils; Schmidt, Philipp; Ozga, Christian; Ehresmann, A.

doi:10.1016/j.elspec.2012.09.005

Cited by 2 publications

(2 citation statements)

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“…The red curve (II) in Figure A can then be attributed to the optical fluorescence of gas-phase OH in the A state created by the dissociation of H 2 O (gas) upon impact of 500 eV Auger electrons. These leading edge Auger electrons from liquid water can be regarded as a broadband excitation . Note that for photon energies just below the O 1s edge photoelectrons from valence levels have about the same kinetic energy as these Auger electrons.…”

Section: Resultsmentioning

confidence: 99%

“…These leading edge Auger electrons from liquid water 44 can be regarded as a broadband excitation. 47 Note that for photon energies just below the O 1s edge photoelectrons from valence levels have about the same kinetic energy as these Auger electrons. However, the absorption cross section below the edge is that low, that a vast majority of photons is absorbed in the bulk of the liquid jet, while feature II is a pure interface effect.…”

Section: Resultsmentioning

confidence: 99%

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Optical Fluorescence Detected from X-ray Irradiated Liquid Water

et al. 2017

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Despite its importance, the structure and dynamics of liquid water are still poorly understood in many apsects. Here, we report on the observation of optical fluorescence upon soft X-ray irradiation of liquid water. Detection of spectrally resolved fluorescence was achieved by a combination of the liquid microjet technique and fluorescence spectroscopy. We observe a genuine liquid-phase fluorescence manifested by a broad emission band in the 170 to 340 nm (4-7 eV) photon wavelength range. In addition, another narrower emission near 300 nm can be assigned to the fluorescence of OH(A state) in the gas phase, the emitting species being formed by Auger electrons escaping from liquid water. We argue that the newly observed broad-band emission of liquid water is relevant in search of extraterrestrial life, and we also envision the observed electronejection mechanism to find application for exploring solutes at liquid-vapor interfaces.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%