K-shell photoabsorption edge of strongly coupled matter driven by laser-converted radiation.
K-shell photoabsorption edge of strongly coupled matter driven by laser-converted radiation.
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DOI：
10.1103/physrevlett.111.155003
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发表时间：
2013-10
影响因子：
8.6
通讯作者：
Yang Zhao;Jiamin Yang;Jiyan Zhang;Guohong Yang;M. Wei;Gang Xiong;T. Song;Zhiyu Zhang;Lihua Bao;B. Deng;Yukun Li;Xiaoan He;Chaoguang Li;Y. Mei;R. Yu;Shaoen Jiang;Shen-ye Liu;Yongkun Ding;Bao-han Zhang
中科院分区：
文献类型：
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作者：
Yang Zhao;Jiamin Yang;Jiyan Zhang;Guohong Yang;M. Wei;Gang Xiong;T. Song;Zhiyu Zhang;Lihua Bao;B. Deng;Yukun Li;Xiaoan He;Chaoguang Li;Y. Mei;R. Yu;Shaoen Jiang;Shen-ye Liu;Yongkun Ding;Bao-han Zhang
The first observation of the K-shell photoabsorption edge of strongly coupled matter with an ion-ion coupling parameter of about 65 generated by intense x-ray radiation-driven shocks is reported. The soft x-ray radiation generated by laser interaction with a "dog bone" high-Z hohlraum is used to ablate two thick CH layers, which cover a KCl sample, to create symmetrical inward shocks. While the two shocks impact at the central KCl sample, a highly compressed KCl is obtained with a density of 3-5 times solid density and a temperature of about 2-4 eV. The photoabsorption spectra of chlorine near the K-shell edge are measured with a crystal spectrometer using a short x-ray backlighter. The redshift of the K edge up to 11.7 eV and broadening of 15.2 eV are obtained for the maximum compression. A comparison of the measured redshifts and broadenings with dense plasma calculations are made, and it indicates potential improvements in the theoretical description.
