Raman Spectroscopy for Quantitative Analysis of Point Defects and Defect Clusters in Irradiated Graphite

<table>(a) The intensity ratio of <svg height="16.299999" id="M8" style="vertical-align:-3.39066pt" version="1.1" viewbox="0 0 68.925003 16.299999" width="68.925003" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,12.013)"><use xlink:href="#x1D43C"></use></g>
<g transform="matrix(.012,-0,0,-.012,7.487,16.088)"><use xlink:href="#x31"></use></g><g transform="matrix(.012,-0,0,-.012,13.199,16.088)"><use xlink:href="#x33"></use></g><g transform="matrix(.012,-0,0,-.012,18.91,16.088)"><use xlink:href="#x35"></use></g><g transform="matrix(.012,-0,0,-.012,24.622,16.088)"><use xlink:href="#x35"></use></g>
<g transform="matrix(.017,-0,0,-.017,30.963,12.013)"><use xlink:href="#x2F"></use></g><g transform="matrix(.017,-0,0,-.017,37.966,12.013)"><use xlink:href="#x1D43C"></use></g>
<g transform="matrix(.012,-0,0,-.012,45.388,16.088)"><use xlink:href="#x31"></use></g><g transform="matrix(.012,-0,0,-.012,51.099,16.088)"><use xlink:href="#x35"></use></g><g transform="matrix(.012,-0,0,-.012,56.81,16.088)"><use xlink:href="#x38"></use></g><g transform="matrix(.012,-0,0,-.012,62.522,16.088)"><use xlink:href="#x30"></use></g>
</svg> and (b) the peak width of 1580 cm<sup>−1</sup> versus the dose in a logarithmic scale for HOPG foils irradiated with 25 keV He<sup>+</sup> at temperatures ranging from RT to 973 K. The appearance of the TEM diffraction pattern of the foils is denoted by<i> s </i>(spot), <i>hs</i> (halo and spot), and <i>h</i> (halo). The solid curves are guides for eyes.</table>

International Journal of Spectroscopy

fig4

Figure 4

Figure 4: Raman Spectroscopy for Quantitative Analysis of Point Defects and Defect Clusters in Irradiated Graphite 