THE DIFFUSION PARAMETERS OF HEAVY WATER

Journal Article · Tue Oct 01 04:00:00 EDT 1963 · Nuclear Science and Engineering (U.S.)

OSTI ID:4162529

Ganguly, N K; Cobb, F C; Waltner, A W

Measurements of the diffusion parameters of heavy water were made using a 1-Mev Van de Graaff accelerator utilizing the Be/sup 9/(d,n) reaction under pulsed operation. The measurements were made at temperatures of 10, 20, 31, 40, and 50 deg C for buckling values ranging from 0.063 to 0.100 cm/sup -2/. The decay of the neutron density was measured by a BF/sub 3/ counter, located under the moderator container, in conjunction with a 26-channel time analyzer. The mean-life for each buckling was computed using Peierls' method; and values of the diffusion parameters were computed by the method of least squares. The value of the diffusion constant, (2.00 plus or minus 0.04) x 10/sup 5/ cm/sup 2//sec at 10 deg C, agreed within the limits of experimental error with that found by Raievski and Horowitz, who used the modulated source method. The coefficient of the B/sup 4/ term, usually referred to as the diffusion cooling coefficient, was found to be (3.72 plus or minus 0.50) x 10/sup 5/ cm/sup 4//sec as compared with (3.5 plus or minus 0.8) x 10/sup 5/ cm/sup 4//sec as reported by Sjostrand. (auth)

• Research Organization: North Carolina State Coll., Raleigh
• NSA Number: NSA-18-000993
• OSTI ID: 4162529
• Journal Information: Nuclear Science and Engineering (U.S.), Journal Name: Nuclear Science and Engineering (U.S.) Vol. Vol: 17; ISSN NSENA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BERYLLIUM 9
BORON FLUORIDES
BUCKLING
COOLING
COUNTERS
DECAY
DEUTERON BEAMS
DIFFUSION
ERRORS
HEAVY WATER
LEAST SQUARES
LIFETIME
MATHEMATICS
MEASURED VALUES
MODERATORS
NEUTRON SOURCES
NEUTRONS
NUCLEAR REACTIONS
NUMERICALS
PHYSICS
PULSE ANALYZERS
PULSES
TEMPERATURE
VAN DE GRAAFF ACCELERATORS
VESSELS