Monte Carlo efficiency predictions for a portable /sup 3/He neutron detector
A small, manportable neutron detector using 18 /sup 3/He proportional counters arranged in 3 banks within a polyethylene moderator is described. Each counter is 25 mm in diameter and 340 mm long (sensitive length) and is filled with highly purified /sup 3/He to a pressure of 400 kPa (4 atm). Measurements of the detector efficiency were made using a calibrated /sup 252/Cf neutron source. Then, independent calculations of the detector efficiency were performed with the TART Monte Carlo transport code. Calculations and measurements for several source/detector arrangements and moderator configurations are compared to evaluate the accuracy of the TART code in predicting the efficiency of small /sup 3/HE neutron detectors.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7321368
- Report Number(s):
- UCRL-52151; TRN: 77-005862
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HE-3 COUNTERS
EFFICIENCY
NEUTRON DETECTION
MONTE CARLO METHOD
POLYETHYLENES
SIMULATION
MEASURING INSTRUMENTS
NEUTRON DETECTORS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
POLYOLEFINS
PROPORTIONAL COUNTERS
RADIATION DETECTION
RADIATION DETECTORS
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments