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The magnetic resonance of triplet excitons in solid free radicals. A zero field magnetic resonance spectrometer

Citation

Thomas, Donal D. (1964) The magnetic resonance of triplet excitons in solid free radicals. A zero field magnetic resonance spectrometer. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-05142003-150740

Abstract

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Part I.

The magnetic resonance of triplet excitons in solid free radicals has been studied in both zero magnetic field and a high magnetic field. A discussion of the spin Hamiltonian for triplet excitons in zero field and high field is presented. Calculations of the second moment of the exciton resonances is given and compared for the two cases. The fine-structure splittings of triplet excitons in Wurster's blue perchlorate in a high magnetic field and in ([...][subscript 3] AsCH[subscript 3] + (TCNQ)[subscript 2]- in zero field have been determined and their temperature dependence is discussed. The temperature dependence of the line width is also given.

Part II.

A zero field magnetic resonance spectrometer has been constructed for use in the 10 - 100 Mc/sec frequency range. A marginal oscillator and bidirectional square wave field modulation are used.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Chemistry and Chemical Engineering
Major Option:Chemistry
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Unknown, Unknown
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1964
Record Number:CaltechETD:etd-05142003-150740
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-05142003-150740
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1795
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:14 May 2003
Last Modified:26 Dec 2012 02:42

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