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

页码：095504 / 1

页数：4

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