Pulsed neutron measurements of the diffusion parameters of heavy and light water mixtures at several temperatures

TR Number
Date
1965
Journal Title
Journal ISSN
Volume Title
Publisher
Virginia Polytechnic Institute
Abstract

Thermal neutron diffusion parameters of O, 20, 50, 80 and 100 percent D₂O in mixtures of light and heavy water were measured by the pulsed neutron technique at room temperature (21°C), near the freezing point of the mixture in the liquid state, and at -20°C in the solid state (ice). A 250-kv pulsed Cockcroft-Walton accelerator, using neutrons from the ₁H²(d,n)₂He³ reaction, was used to generate fast neutrons bursts.

The values of the infinite medium decay constant, λ₀, were computed by a least squares fit of λ versus B² data to the expression:

λ = λ + D₀B² - CB⁴

The parameters D₀, C, and λ𝗍ᵣ were determined from the above expression after rearranging:

λ-λ₀ = D B² - CB⁴

The resulting values of D₀, C, λ, and λ𝗍ᵣ at several temperatures are tabulated.

Description
Keywords
Citation