CHEMICAL REACTIONS USING MODULATED FREE RADICAL BEAMS, PART A. THE VAPOR PRESSURE OF SOLID HYDROGEN IN THE TEMPERATURE RANGE FROM 4.7 K TO 1

Abstract

Modulated, crossed molecular beams were employed to study the chemical kinetics of several freeradical reactions. For the hydrogen-isotope exchange (H + D2 yields HD + D) signals were detected which correspond to a reaction crosssection of approximately 10 to the -19th power sq cm. Elastic scattering complicates the interpretation. The promises, methods, and difficulties of the crossed-beam technique are discussed. Measurements were made of the vapor pressure of solid H, of a nominal 75% orthohydrogen composition, from 4.7 to 11.1 K. The results were fitted to Kirchoff's equation. A suitable expression for the vapor pressure was found to be log P(mm) equals -43.39/T + 5/2 log T(K) plus 2.047 from 4.7 to 13.95 K. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 28, 1962
Accession Number
AD0277010

Entities

Organizations

  • General Dynamics

Tags

DTIC Thesaurus Topics

  • Chemical Kinetics
  • Chemical Reactions
  • Elastic Scattering
  • Free Radicals
  • Hydrogen
  • Isotope Exchange
  • Kinetics
  • Measurement
  • Molecular Beams
  • Scattering
  • Vapor Pressure

Readers

  • Combustion science or combustion engineering.
  • Molecular Photonics/Laser Physics