Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Erno Vandeweert"'
Autor:
Christian Van Haesendonck, Peter Lievens, N. Vandamme, Ewald Janssens, Johan Snauwaert, Erno Vandeweert
Publikováno v:
Surface Science. 558:57-64
Tapping mode atomic force microscopy (TM-AFM) was used to characterize individual gold clusters deposited on a 1,4-benzenedimethanethiol layer. Au n ( n =1–500) clusters were produced with a laser vaporization source and deposited with low kinetic
Autor:
F. Kollmer, Peter Lievens, N. Erdmann, C. Grüning, Alfred Benninghoven, M. Betti, Philipsen, Erno Vandeweert, Roger Silverans
Publikováno v:
Analytical Chemistry. 75:3175-3181
The resonance and nonresonant laser ionization of uranium atoms sputtered from thin metal films and individual micrometer-size uranium oxide particles, respectively, was studied to evaluate a new setup for the analysis of actinide-containing micromet
Publikováno v:
Spectrochimica Acta Part B: Atomic Spectroscopy. 58:1147-1154
We demonstrate how resonance laser ionization spectroscopy can be applied to investigate the electronic processes that lead to the sputtering of neutral atoms in different quantum states upon keV-ion bombardment of metallic surfaces. Key information
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 203:158-163
Modeling of the electronic processes during sputtering of metals is presented in the framework of the resonant electron transfer (RET) model. The population partition and the state-selective velocity distributions of Co atoms sputtered in the ground
Autor:
Sven Neukermans, Ewald Janssens, Erno Vandeweert, Andreas Wucher, Roger Silverans, C Staudt, Frederik Vanhoutte, Peter Lievens
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 193:787-793
The internal energy distribution of neutral indium clusters Inn sputtered from a polycrystalline In surface by 15 keV Xe+ ions is investigated by means of laser post-ionization and time-of-flight mass spectrometry. In particular, the neutral species
Publikováno v:
Spectrochimica Acta Part B: Atomic Spectroscopy. 57:95-107
Auto-ionizing states of neutral iridium were observed in the continuum structure near the first ionization limit using one-color and two-color two-step resonance laser ionization spectroscopy. The total angular momentum of 20 even-parity auto-ionizin
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 182:127-134
This paper deals with the investigation of electronic processes involved in the emission of neutral atoms during keV ion-beam sputtering of metals. We first present an experimental study of Ar + ion-beam sputtering of clean, polycrystalline metals. A
Autor:
C. A. Meserole, Zbigniew Postawa, Yusheng Dou, Nicholas Winograd, Erno Vandeweert, Barbara J. Garrison
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 180:53-57
Experiments have been conducted to gain insight into the processes of desorption of neutral species from surfaces covered with organic molecules due to bombardment with keV particles. The system is comprised of benzene molecules adsorbed onto Ag(1 1
Autor:
Helmut H. Telle, Erno Vandeweert, Jeroen Bastiaansen, Peter Lievens, Vicky Philipsen, Roger Silverans, G. Verschoren
Publikováno v:
Spectrochimica Acta Part B: Atomic Spectroscopy. 55:1539-1550
We report on the investigation of the double-resonant photoionization of Sr atoms out of the ground state 5s2 1S0 and the metastable triplet states 5s5p 3PoJ. Specifically, the saturation behavior of both the excitation steps to intermediate states,
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :795-802
This paper deals with the investigation of electronic processes by resonance ionization spectroscopy during keV ion-beam sputtering of metals. We report the measurement of the population partition over the ground and metastable states of sputtered Sr