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Feynman-alpha experiment with stationary multiple emission sources

Authors
Journal
Progress in Nuclear Energy
0149-1970
Publisher
Elsevier
Publication Date
Volume
48
Issue
6
Identifiers
DOI: 10.1016/j.pnucene.2006.03.002
Keywords
  • Feynman-Alpha Experiment
  • Accelerator Driven System (Ads)
  • Subcriticality Monitoring
  • Multiplicity Of Source Neutrons
  • Spallation Neutron Source
  • Spontaneous Neutron Source

Abstract

Abstract In order to verify the Feynman-alpha formula with stationary multiple emission sources [Pázsit, I., Yamane, Y., 1998. Nuclear Instruments and Methods A403, 431–441], a series of experiments were performed by using three different neutron sources, i.e., an Am–Be, a 252Cf, and a randomly triggered D–T pulsed neutron generator. As a result, it was found that the prompt neutron decay constant evaluated from the measured Y-function was hardly affected by the difference of neutron sources that have respective source multiplicities. On the other hand, it was demonstrated that the amplitude of Y-function, i.e., the correlation amplitude, depended on both the subcriticality and the neutron source multiplicity. These experimental facts agreed with the theoretical prospects that were deduced from the Feynman-alpha formula with multiple emission sources. Therefore, it was concluded that the validity of this formula was experimentally shown.

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