Shock temperatures in fused silica measured by optical technique

Abstract

Shock temperatures of fused silica were determined using radiance intensity measurements at two color bands of 620 and 810 nm. The shock temperature increased from 2.0×103 to 3.3×103 K in the pressure range between 31.8 and 40.5 GPa, and up to 4.2×103 K in the range up to 65.1 GPa. The rate of increase of temperature with pressure decreased at ∼40 GPa. The low gradient above 40 GPa suggests that a shock-induced phase transformation of fused silica begins at ∼40 GPa.