Study of cerium phase transitions in shock wave experiments

被引：6

作者：

Zhernokletov, M. V. ^{[1
]}

Kovalev, A. E. ^{[1
]}

Komissarov, V. V. ^{[1
]}

Novikov, M. G. ^{[1
]}

Zocher, M. A. ^{[2
]}

Cherne, F. J. ^{[2
]}

机构：

[1] All Russia Res Inst Expt Phys VNIIEF, Russian Fed Nucl Ctr, Sarov 607190, Nizhni Novgorod, Russia

[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 2011年 / 112卷 / 02期

关键词：

HIGH-PRESSURE; GAMMA; COMPRESSION; EQUATION; METALS; STATE;

D O I：

10.1134/S1063776110061196

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Cerium has a complex phase diagram that is explained by the presence of structural phase transitions. Experiments to measure the sound velocities in cerium by two methods were carried out to determine the onset of cerium melting on the Hugoniot. In the pressure range 4-37 GPa, the sound velocity in cerium samples was measured by the counter release method using manganin-based piezoresistive gauges. In the pressure range 35-140 GPa, the sound velocity in cerium was measured by the overtaking release method using carbogal and tetrachloromethane indicator liquids. The samples were loaded with plane shock wave generators using powerful explosive charges. The onset of cerium melting on the Hugoniot at a pressure of about 13 GPa has been ascertained from the measured elastic longitudinal and bulk sound velocities.

引用

页码：212 / 219

页数：8

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