Some Calculations on the Age of Neutrons in D₂O

Journal Article · Mon May 01 04:00:00 EDT 1961 · Nuclear Science and Engineering

OSTI ID:4093815

Goldstein, H. ^[1]; Certaine, J. ^[1]

---

1. Nuclear Development Corp. of America, White Plains, NY (United States)

The moments method is used to calculate the flux age at 1.44 ev, in D₂O and D₂O-H₂O mixtures, of neutrons from various point isotropic sources. For the neutrons from a D-D source averaged over-all solid angle and operating at a deuteron energy of 200 kev, the age in 99.8% D₂O is computed to be 118.6 ± 1.2 cm², in agreement with experiment. The rate of change of age for this source with very small admixtures of H₂O is found to be-4.5% per 1% H₂O. Flux ages to 1.44 ev are also calculated for seven monoenergetic point sources from 2.00 to 2.98 Mev in energy. The approximate linearity of these ages with source energy is used to show that uncertainties in the angular distribution of the D-D source neutrons have a negligible effect on the averaged age. It is also shown that the 2.4 Mev antiresonance in oxygen is manifested in the age in D₂O only as a correction to the first flight term.

• Research Organization: Nuclear Development Corp. of America, White Plains, NY (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP); US Atomic Energy Commission (AEC)
• NSA Number: NSA-15-020128
• OSTI ID: 4093815
• Journal Information: Nuclear Science and Engineering, Journal Name: Nuclear Science and Engineering Vol. 10; ISSN 0029-5639
• Publisher: Taylor & Francis
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DEUTERIUM
DEUTERONS
ENERGY RANGE
EV RANGE
HEAVY WATER
HELIUM 3
MIXING
MOMENTS METHOD
NEUTRON FLUX
NEUTRON SOURCES
NEUTRONS
NUCLEAR REACTIONS
Nuclear Criticality Safety Program (NCSP)
TRANSPORT THEORY
WATER