Achieving accurate nuetron-multiplicity analysis of metals and oxides with weighted point model equations.
- Jane M.
- William H.
- Merlyn S.
- Douglas R.
Neutron multiplicity counting is a technique for the rapid, nondestructive measurement of plutonium mass in pure and impure materials. This technique is very powerful because it uses the measured coincidence count rates to determine the sample mass without requiring a set of representative standards for calibration. Interpreting measured singles, doubles, and triples count rates using the three-parameter standard point model accurately determines plutonium mass, neutron multiplication, and the ratio of ({alpha},n) to spontaneous-fission neutrons (alpha) for oxides of moderate mass. However, underlying standard point model assumptions - including constant neutron energy and constant multiplication throughout the sample - cause significant biases for the mass, multiplication, and alpha in measurements of metal and large, dense oxides.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 977717
- Report Number(s):
- LA-UR-04-4357; TRN: US1004154
- Resource Relation:
- Conference: Submitted to: 45th Annual INMM Meeting, Orlando, FL, July 18-22, 2004
- Country of Publication:
- United States
- Language:
- English
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