Accession Number : AD0651964

Title :   THE DIELECTRIC RELAXATION SPECTRA OF WATER, ICE, AND AQUEOUS SOLUTIONS AND THEIR INTERPRETATION. I. CRITICAL SURVEY OF THE STATUS QUO FOR WATER; II. TENTATIVE INTERPRETATION OF THE RELAXATION SPECTRUM OF WATER IN THE TIME AND FREQUENCY DOMAIN.

Descriptive Note : Technical repts.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE LAB FOR INSULATION RESEARCH

Personal Author(s) : VON Hippel,Arthur R.

Report Date : APR 1967

Pagination or Media Count : 42

Abstract : On the basis of the presently available evidence, the following picture emerges: Quantum jumps induced by thermal phonon excitation in the near infrared disconnect water dipoles sufficiently from their surroundings to allow reorientation of these dipoles and a subsequent reorganization of their near-surroundings. In an applied electric field, these jumps can be measured as polarization spike signals in the time domain. The statistical correlation time between consecutive jumps of the same water molecule determines the relaxation time in the frequency domain. With increasing temperature the statistical average of the required activation energy moves from the intramolecular into the intermolecular region, and the effect of deuterium substitution on vibration frequency and time consequently falls. Infrared excitation and microwave relaxation spectrum are coupled in the frequency domain with opposite trends: motion of the excitation spectrum toward higher frequencies moves the relaxation spectrum toward lower frequencies and vice versa. (Author)

Descriptors :   (*POLARIZATION, *WATER), (*INFRARED SPECTROSCOPY, WATER), ICE, INFRARED SPECTRA, EXCITATION, INFRARED EQUIPMENT, HIGH FREQUENCY, ENERGY, PHONONS, MICROWAVES, DIPOLE MOMENTS, SOLUTIONS(MIXTURES), THERMAL ANALYSIS, STATISTICAL ANALYSIS, DIELECTRIC PROPERTIES

Subject Categories : Inorganic Chemistry
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE