Monte Carlo efficiency predictions for a portable /sup 3/He neutron detector

Technical Report · Wed Oct 20 00:00:00 EDT 1976

DOI:https://doi.org/10.2172/7321368· OSTI ID:7321368

O'Dell, A A

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

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
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