Accession Number:

ADA285088

Title:

Thermal Dissociation of Halogen Azides

Descriptive Note:

Final rept. 15 Apr 1990-30 Jun 1994

Corporate Author:

ROCKWELL INTERNATIONAL CORP THOUSAND OAKS CA SCIENCE CENTER

Personal Author(s):

Report Date:

1994-09-01

Pagination or Media Count:

169.0

Abstract:

Both FN3 and ClN3 were dissociated in the presence of a variety of donor molecules, either by pulsed CO2 laser excitation using SF6 as a sensitizer or by thermal excitation in a chemically driven shock tube. The donors were selected to support energy transfer from the metastable NFa and NCla products of the azide dissociation reactions, and optical diagnostics were employed to study energy transfer rates, optical gain and lasing visible wavelengths. Product of NCIa was shown to be inefficient, however, both gain and lasing were achieved in two systems driven by NFa. Lasting at 471 nm on the BiF9A-X transition was obtained by transient heating of FN3BiCH33 gas mixtures, however, power extraction was highly inefficient due to the low gain provided by the emitter and the short duration of the shock tube experiment. Much higher gain coefficients wer obtained by CO2 laser heating of FN3B2H6SF6 gas mixtures, which produced intense BHA-x chemiluminescence and lasing at 433 nm in a low volume cavity with a threshold gain of 2.5 cm. An improved BH donor was synthesized by reacting B2H6 with NH3 in a heated capillary oven and optical absorption diagnostics were developed for the dark BHX and BHa states.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE