This paper presents dead-time calculations for the Portable Spectroscopic Fast Neutron Probe (N-Probe) using a combination of the attenuation law, MCNP (Monte Carlo N-particle Code) simulations and the assumption of ideal paralyzing and non-paralyzing dead-time models. The N-Probe contains an NE-213 liquid scintillator detector and a spherical 3He detector. For the fast neutron probe, non-paralyzing dead-time values were higher than paralyzing dead-time values, as expected. Paralyzing dead-time was calculated to be 37.6 μs and non-paralyzing dead-time was calculated to be 43.7 μs for the N-Probe liquid scintillator detector. Dead-time value for Canberra 3He neutron detector (0.5NH1/1K) was also estimated using a combination of subcritical assembly measurements and MCNP simulations. The paralyzing dead-time was estimated to be 14.5 μs, and the non-paralyzing dead-time was estimated to be 16.4 μs for 3He gas filled detector. These results are consistent with the dead-time values reported for helium detectors.
- Gas detectors,
- Monte Carlo methods,
- Probes,
- Scintillation counters,
- Attenuation law,
- Dead time,
- Dead time measurement,
- Gas-filled detectors,
- Liquid scintillator detectors,
- MCNP simulations,
- Monte Carlo N particle code,
- Subcritical assembly,
- Neutrons,
- Dead-time calculations
Available at: http://works.bepress.com/shoaib-usman/148/