A boron-lined proportional counter (BLPC) used in a mixed field of reactors

Abstract

A boron-lined proportional counter (BLPC) with a count rate limit close to the multi-wire proportional counter was manufactured to measure the mixed field around reactors. After measurement with a standard Am-Be neutron source (activity: 100 mCi), the results show that the operating voltage of the BLPC is 800 V, the plateau length is 100 V and the slope is 13.2%/100 V. The width and rise time of the output pulse of the BLPC are 1.26 μs and 370 ns, respectively. When the BLPC works at a count rate of 1.0×105 count/s, the pulse pile-up probability of the BLPC is 3.6%. A clear peak can be seen in the pulse height spectrum of the BLPC. and the performances illustrate that a BLPC working in pulse mode can serve as a source range detector of reactors.

Toward a fractal spectrum approach for neutron and gamma pulse shape discrimination

“…Naturally, γ-rays and neutrons are generated simultaneously, and electrically neutral neutrons interact with surrounding substances by inelastic scattering and radiation capture by moderated neutrons, thus in almost all situations, neutrons will be accompanied by a large γ background. Neutron-sensitive detectors are also sensitive to γ-rays; as a result it is difficult to distinguish signals from neutrons and γ-rays [2][3][4][5].…”

Performance studies of boron lined proportional counters for reactor applications

“…Recently extensive work has been published [ref. [1][2][3][4][5][6][7][8][9][10][11] and references within] on the development of boron lined proportional counters. A lot has been discussed regarding modeling of boron counters for efficiency and performance characteristics.…”