Age to Indium Resonance for D-D Neutrons in Water

Journal Article · Wed Oct 01 04:00:00 EDT 1958 · Nuclear Science and Engineering

OSTI ID:4297908

Spiegel Jr., V. ^[1]; Oliver, D. W. ^[1]; Caswell, R. S. ^[1]

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1. National Bureau of Standards, Washington, DC (United States)

The average 1.44-ev indium resonance age has been determined from activation measurements for a D(d,n)He³ neutron source in water. The energy of the incident deuteron beam was 250 kev. The source emits neutrons anisotropically with energies from 3.12 Mev at 0 to 2.00 Mev at 180. The activities were averaged over angle by the Gauss integration procedure using angles of 20.3, 90, and 159.7. The average age, when corrected for the absence of moderator in the duct which brings the deuteron beam into the medium, is 34.6 ± 2.2 cm². Rigorous theoretical calculations for a D + D neutron source by Zweifel give 33.6 cm² for 100kev incident deuterons and 33.8 cm² for 150-kev deuterons. Any estimate of an age for a 250 kev D+ source would yield a larger value of age and closer agreement with this experiment. The variation of our measured ages versus angle may be understood qualitatively on the basis of effects due to the duct and the anisotropy of the source.

• Research Organization: National Bureau of Standards, Washington, DC (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP); US Atomic Energy Commission (AEC)
• NSA Number: NSA-13-001686
• OSTI ID: 4297908
• Journal Information: Nuclear Science and Engineering, Journal Name: Nuclear Science and Engineering Vol. 4; ISSN 0029-5639
• Publisher: Taylor & Francis
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
97 MATHEMATICS AND COMPUTING
ACTIVATION
ANGULAR DISTRIBUTION
ANISOTROPY
DEUTERIUM
DEUTERON BEAMS
ENERGY
ENERGY RANGE
FERMI AGE
HELIUM 3
INDIUM
NEUTRON SOURCES
Nuclear Criticality Safety Program (NCSP)
RESONANCE
WATER MODERATOR