Title :
Calculated and Measured Efficiency of a Man-Portable 3He Neutron Detector
Author_Institution :
Lawrence Livermore Laboratory, University of California, Livermore, California 94550
Abstract :
We have constructed a small man-portable neutron detector using 18 3He proportional counters arranged in three layers within a polyethylene moderator. Each counter is 25 mm in diameter by 340 mm long (sensitive length) and is filled with highly-purified 3He to a pressure of 400 kPa (4 atm). Efficiency measurements were made using a 252Cf neutron source. Detailed calculations of the detector efficiency were done using the TART Monte Carlo transport code. Calculations and measurements were compared for several source/detector configurations.
Keywords :
Counting circuits; Detectors; Helium; Laboratories; Monte Carlo methods; Neutrons; Polyethylene; Position measurement; Preamplifiers; Scattering;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.1977.4328757
