THE HYDRODYNAMIC EXPANSION OF REFRACTORY MATERIALS CHARACTERIZED BY LASER SPECTROSCOPY-METALLIC COPPER

Loading...
Thumbnail Image

Date

1979

Journal Title

Journal ISSN

Volume Title

Publisher

Ohio State University

Research Projects

Organizational Units

Journal Issue

Abstract

Copper is expanded hydrodynamically over an oven temperature range from $2400-2600^{\circ} $K. The products of expansion are characterized using laser induced excitation and photoluminescence spectroscopy covering a spectral range $4200-6600$\AA. An analysis of the $Cu_{2} B^{1}\Sigma^{+}_{u} - X^{1}\Sigma_{g}{^{+}}$ band system indicates that substantial cooling of internal degrees of freedom has occurred. A rotational temperature $\leq 700 K$ and a vibrational temperature $\leq 900 K$ is found for the $Cu_{2}$ formed in expansion. In addition, spectral features which must be attributed to a new state of $Cu_{2}$ or $Cu_{3}$ are observed. The analysis of these features will be discussed.

Description

Author Institution:

Keywords

Citation