DETERMINATION OF IRRADIATION PRODUCED TRIPLET EXCITATION BY FLASH SPECTROSCOPY

Abstract

Triplet excited states accompanying pulsed electron irradiation of solutions of anthracene, phenanthrene, naphthalene and 9-acetylanthracene were detected by flash absorption spectroscopy. G(triplet) for anthracene is 0.5 for a dose of 10 to the 18th power ev/g and a dose rate of 10 to the 23rd power ev/g-sec. Energy transfer from the solvent and subexcitation electron impact appeared to be important in triplet formation. Decay rates for the above triplets were of the ordered 1/10 to the 3rd power/sec in paraffin oil and 1/10 to the 4th power/sec in cyclohexane and benzene. The first order rate constants increased with dose and temperature. The triplet decay process was interpreted as diffusive free radical quenching by radicals produced simultaneously with triplets during irradiation. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1961
Accession Number
AD0268637

Entities

People

  • John D. Mccollum
  • W.a. Wilson

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Alkanes
  • Aromatic Polycyclic Hydrocarbons
  • Chemical Compounds
  • Cyclic Compounds
  • Cyclic Hydrocarbons
  • Cyclohexanes
  • Dose Rate
  • Electron Irradiation
  • Electrons
  • Energy
  • Energy Transfer
  • Excitation
  • Free Radicals
  • Naphthalenes
  • Phenanthrenes
  • Spectroscopy

Fields of Study

  • Chemistry
  • Physics

Readers

  • Organic Chemistry

Technology Areas

  • Microelectronics