TIME-RESOLVED SPECTROSCOPIC OBSERVATIONS OF SHOCK-INDUCED SILICATE IONIZATION

被引：5
|
作者：
Kurosawa, K. [1 ]
Kadono, T. [1 ]
Sugita, S. [1 ]
Shigemori, K. [1 ]
Hironaka, Y. [1 ]
Sano, T. [1 ]
Sakaiya, T. [1 ]
Ozaki, N. [1 ]
Shiroshita, A. [1 ]
Ohno, S. [1 ]
Cho, Y. [1 ]
Hamura, T. [1 ]
Fujioka, S. [1 ]
Tachibana, S. [1 ]
Vinci, T. [1 ]
Kodama, R. [1 ]
Matsui, T. [1 ]
机构：
[1] Japan Aerosp & Explorat Agcy, Inst Space & Astronaut Sci, Kanagawa, Japan
来源：
SHOCK COMPRESSION OF CONDENSED MATTER - 2011, PTS 1 AND 2 | 2012年 / 1426卷
基金：
日本学术振兴会;
关键词：
Meteoritic impacts; EOS for silicates; Vaporization/Ionization; Spectroscopy; Laser shock; EQUATION-OF-STATE; SIMULATIONS; IMPACT;
D O I：
10.1063/1.3686412
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We conducted time-resolved spectroscopic observations of shock-heated quartz and forsterite using a high-power laser. The results revealed that ionization occur easily under shock-induced warm dense conditions. We compare the obtained temperatures on the Hugoniot with a few theories. The comparison suggests that the contribution of shock-induced ionization to the isochoric specific heat during shock compression is similar to 1 k(b)/atom for quartz and forsterite. Shock-induced ionization and subsequent electron recombination leads to a larger amount of vapor and may lead to dynamical and chemical evolution of silicate vapor clouds different from our current understandings.
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页数：4
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