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Shock-induced temperatures of MgO

Svendsen, Bob and Ahrens, Thomas J. (1987) Shock-induced temperatures of MgO. Geophysical Journal of the Royal Astronomical Society, 91 (3). pp. 667-691. ISSN 0016-8009. doi:10.1111/j.1365-246X.1987.tb01664.x.

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Shock-compressed MgO radiates thermally at temperatures between 2900 and 3700 K in the 170–200 GPa pressure range. A simple energy-transport model of the shocked-MgO-targets distinguishes between different shock-induced radiation sources in these targets and provides estimates of spectral absorption-coefficients, α_(λMgO), for shocked MgO (e.g. at 203 GPa, α_(λMgO) ~ 630, 7500, 4200 and 3800 m^(−1), at 450, 600, 750 and 900 nm, respectively). The experimentally inferred temperatures of the shock-compressed states of MgO are consistent with temperatures calculated for MgO assuming that (1) it deforms as an elastic fluid, (2) has a Dulong-Petit value for specific heat at constant volume in its shocked state, and (3) undergoes no phase transformation below 200 GPa.

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Additional Information:Copyright © 1987 The Royal Astronomical Society. Accepted 1987 April 23. Received 1987 April 20; in original form 1986 October 14. We thank Papo Gelle, Mike Long, Chuck Manning and Leon Young for experimental assistance, Gregory Miller, Jay D. Bass, Douglas R. Schmitt and James A. Tyburczy provided enlightening discussions. We also thank Mark B. Boslough and an anonymous reviewer for constructive comments on the first draft of this paper. Support from NSF grant EAR-8608249 is gratefully acknowledged. Contribution 4413, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California.
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Subject Keywords:shock compression; optical radiation; temperature; magnesium oxide
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Caltech Division of Geological and Planetary Sciences4413
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ID Code:51061
Deposited By: George Porter
Deposited On:30 Oct 2014 18:16
Last Modified:10 Nov 2021 19:05

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