Application of Coincidence Doppler-Broadening Spectroscopy to Different Carbon Phases
Application of Coincidence Doppler-Broadening Spectroscopy to Different Carbon Phases
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DOI：
10.4028/www.scientific.net/msf.445-446.310
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发表时间：
2004-01
期刊：
影响因子：
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通讯作者：
Yutaka Ito;N. Djourelov;Takenori Suzuki;K. Kondo;Y. Ito;V. Shantarovich;J. Onoe
中科院分区：
文献类型：
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作者：
Yutaka Ito;N. Djourelov;Takenori Suzuki;K. Kondo;Y. Ito;V. Shantarovich;J. Onoe
重合多普勒展宽光谱应用于C60和C70富勒烯以及其他碳相，如纳米管和石墨。在这些材料中，正电子湮灭射线的多普勒展宽有显著差异，这反映了被正电子湮灭的电子动量密度分布的不同。这可能是由于电子与正电子湮灭时的不同组成造成的。这一结果表明了重合多普勒展宽法测定正电子取样电子密度分布的灵敏度。
Coincidence Doppler-broadening spectroscopy was applied to C60 and C70 fullerenes and other carbon phases, such as nanotubes and graphites. Remarkable differences were observed in the Doppler-broadening of the positron annihilation -rays in these materials, which reflect the different densities distribution of the momentum for electrons annihilated with positrons. This would be caused by the different composition of the and electrons in annihilation with positrons. This result shows the sensitivity of the coincidence Doppler-broadening method to determine the density distribution of electrons sampled by positrons.