Features

• Designed for quantitative passive neutron analysis
• High Efficiency: >50% for ²⁴⁰Pu spontaneous fission neutrons
• Fast Die-Away Time: 24 �s
• Improved measurement precision
• Large Sample Cavity accommodates samples up to 40 L
• Fast Amptek electronics
• Low deadtime: 41 ns
• Internal De-randomizing Board
• Operated using JSR-14 shift registers
• Available with NDA 2000 software

Description

The Large Epi-Thermal Multiplicity Counter (LEMC) is a high performance neutron coincidence counter designed for measuring the multiplicity of the neutron emission from both spontaneous fission and induced-fission reaction in plutonium and uranium. The LEMC was developed to measure impure plutonium and mixed-oxide (MOX) scrap materials for safeguards and inventory control applications. Intended for the measurement of items up to 40 liters (10 gallons) in volume, the counter is designed to provide improved measurement precision through the use of multiple cadmium layers and high pressure (10 atm) 3He proportional tubes.