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Title: Absolute nuclear material assay

Patent ·
OSTI ID:993087

A method of absolute nuclear material assay of an unknown source comprising counting neutrons from the unknown source and providing an absolute nuclear material assay utilizing a model to optimally compare to the measured count distributions. In one embodiment, the step of providing an absolute nuclear material assay comprises utilizing a random sampling of analytically computed fission chain distributions to generate a continuous time-evolving sequence of event-counts by spreading the fission chain distribution in time.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-48
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA)
Patent Number(s):
7,756,237
Application Number:
11/244,088
OSTI ID:
993087
Country of Publication:
United States
Language:
English

References (3)

Correlation Analysis with Neutron Count Distributions in Randomly or Signal Triggered Time Intervals for Assay of Special Fissile Materials journal February 1985
Probabilities of Prompt-Neutron Emission from Spontaneous Fission journal February 1956
Third Moment of the Number of Neutrons Detected in Short Time Intervals journal February 1968