Extended x-ray absorption fine structure measurements of laser-shocked V and Ti and crystal phase transformation in Ti

被引：28
|
作者：
Yaakobi, B
Meyerhofer, DD
Boehly, TR
Rehr, JJ
Remington, BA
Allen, PG
Pollaine, SM
Albers, RC
机构：
[1] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA
[2] Univ Washington, Dept Phys, Seattle, WA 98195 USA
[3] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[4] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 09期
关键词：
D O I：
10.1103/PhysRevLett.92.095504
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Extended x-ray absorption fine structure (EXAFS), using a laser-imploded target as a source, can yield the properties of laser-shocked metals on a nanosecond time scale. EXAFS measurements of vanadium shocked to similar to0.4 Mbar yield the compression and temperature in good agreement with hydrodynamic simulations and shock-speed measurements. In laser-shocked titanium at the same pressure, the EXAPS modulation damping is much higher than is warranted by the predicted temperature increase. This is shown to be due to the alpha-Ti to omega-Ti crystal phase transformation, known to occur below similar to0.1 Mbar for slower shock waves.
引用
收藏
页码：095504 / 1
页数：4
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