Abstract
A time-resolved X-ray absorption spectroscopy apparatus in the laboratory scale has been set-up by utilizing laser plasmas as an X-ray source. One of the major objectives using this apparatus is to observe X-ray absorption fine structures (XAFS) of various materials during materials processing in an energy region between 100 eV and 3 keV. For this purpose, we have provided two sets of optical and detecting systems. The most intense X-rays are generated from Au plasma and the intensity reaches as high as 10{sup 16} photons/pulse in 2{pi} steradian in the energy region below 300 eV. The energy resolution of the spectrometer {Delta}E/E has been determined to be 5 x 10{sup -3}. The dynamic behavior of fragments ejected from the surface by laser ablation has been observed for a carbon rod and a pellet of C{sub 60} powder. Dominant fragments removed from the carbon rod have been found to be clusters, neutral atoms and ions. Maximum velocities of ejected clusters and atoms have been estimated to be less than 1.4 x 10{sup 4} m/s and more than 2 x 10{sup 4} m/s, respectively. C{sub 60} molecules have been removed from the pellet surface without decomposition by mild laser ablation. X-ray photoelectron
More>>
Yoda, Osamu;
Miyashita, Atsumi;
[1]
Ohyanagi, Takasumi;
Murakami, Kouichi
- Japan Atomic Energy Research Inst., Takasaki, Gunma (Japan). Takasaki Radiation Chemistry Research Establishment
Citation Formats
Yoda, Osamu, Miyashita, Atsumi, Ohyanagi, Takasumi, and Murakami, Kouichi.
Dynamic behaviors of fragments ejected from the surface of carbon materials by laser ablation.
Japan: N. p.,
1992.
Web.
Yoda, Osamu, Miyashita, Atsumi, Ohyanagi, Takasumi, & Murakami, Kouichi.
Dynamic behaviors of fragments ejected from the surface of carbon materials by laser ablation.
Japan.
Yoda, Osamu, Miyashita, Atsumi, Ohyanagi, Takasumi, and Murakami, Kouichi.
1992.
"Dynamic behaviors of fragments ejected from the surface of carbon materials by laser ablation."
Japan.
@misc{etde_10150867,
title = {Dynamic behaviors of fragments ejected from the surface of carbon materials by laser ablation}
author = {Yoda, Osamu, Miyashita, Atsumi, Ohyanagi, Takasumi, and Murakami, Kouichi}
abstractNote = {A time-resolved X-ray absorption spectroscopy apparatus in the laboratory scale has been set-up by utilizing laser plasmas as an X-ray source. One of the major objectives using this apparatus is to observe X-ray absorption fine structures (XAFS) of various materials during materials processing in an energy region between 100 eV and 3 keV. For this purpose, we have provided two sets of optical and detecting systems. The most intense X-rays are generated from Au plasma and the intensity reaches as high as 10{sup 16} photons/pulse in 2{pi} steradian in the energy region below 300 eV. The energy resolution of the spectrometer {Delta}E/E has been determined to be 5 x 10{sup -3}. The dynamic behavior of fragments ejected from the surface by laser ablation has been observed for a carbon rod and a pellet of C{sub 60} powder. Dominant fragments removed from the carbon rod have been found to be clusters, neutral atoms and ions. Maximum velocities of ejected clusters and atoms have been estimated to be less than 1.4 x 10{sup 4} m/s and more than 2 x 10{sup 4} m/s, respectively. C{sub 60} molecules have been removed from the pellet surface without decomposition by mild laser ablation. X-ray photoelectron measurements suggest that some reorganization has occurred on the surface of the ablated C{sub 60} pellet. A periodic structure has been discovered on the laser ablated C{sub 60} pellet and the spacing of that periodic structure is explained by the surface scattering model. (author).}
place = {Japan}
year = {1992}
month = {Oct}
}
title = {Dynamic behaviors of fragments ejected from the surface of carbon materials by laser ablation}
author = {Yoda, Osamu, Miyashita, Atsumi, Ohyanagi, Takasumi, and Murakami, Kouichi}
abstractNote = {A time-resolved X-ray absorption spectroscopy apparatus in the laboratory scale has been set-up by utilizing laser plasmas as an X-ray source. One of the major objectives using this apparatus is to observe X-ray absorption fine structures (XAFS) of various materials during materials processing in an energy region between 100 eV and 3 keV. For this purpose, we have provided two sets of optical and detecting systems. The most intense X-rays are generated from Au plasma and the intensity reaches as high as 10{sup 16} photons/pulse in 2{pi} steradian in the energy region below 300 eV. The energy resolution of the spectrometer {Delta}E/E has been determined to be 5 x 10{sup -3}. The dynamic behavior of fragments ejected from the surface by laser ablation has been observed for a carbon rod and a pellet of C{sub 60} powder. Dominant fragments removed from the carbon rod have been found to be clusters, neutral atoms and ions. Maximum velocities of ejected clusters and atoms have been estimated to be less than 1.4 x 10{sup 4} m/s and more than 2 x 10{sup 4} m/s, respectively. C{sub 60} molecules have been removed from the pellet surface without decomposition by mild laser ablation. X-ray photoelectron measurements suggest that some reorganization has occurred on the surface of the ablated C{sub 60} pellet. A periodic structure has been discovered on the laser ablated C{sub 60} pellet and the spacing of that periodic structure is explained by the surface scattering model. (author).}
place = {Japan}
year = {1992}
month = {Oct}
}