Neutron spectroscopy with a high-pressure nitrogen-filled spherical proportional counter

Neutron spectroscopy with a high-pressure nitrogen-filled spherical proportional counter
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使用高压充氮球形正比计数器进行中子谱分析

DOI:
10.1016/j.nima.2023.168124
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发表时间:
2023
期刊:
Accelerators, Spectrometers, Detectors and Associated Equipment
影响因子:
--
通讯作者:
Giomataris I
Giomataris I
中科院分区:
--
文献类型:
--
作者:
Giomataris I

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球形正比计数器是一种大体积气体探测器,它在几个领域都有应用,包括直接暗物质搜索。当探测器充满氮时,由于14N(n,α)11B和14N(n,p)14C反应,它成为一个有效的中子谱仪。然而,对于比例计数器来说,氮气是一种具有挑战性的工作气体,需要很高的电场强度与气体压力比。得益于球面正比计数器仪器和模拟技术的最新进展,我们首次报道了在工作压力高达1.8bar的情况下进行的中子测量。这一成果增强了球形正比计数器作为中子谱仪的前景,适用于具有挑战性的环境,包括地下实验室以及工业和医疗环境。
The spherical proportional counter is a large volume gaseous detector which finds application in several fields, including direct Dark Matter searches. When the detector is filled with nitrogen it becomes an effective neutron spectrometer thanks to the 14 N (n, α) 11 B and 14 N (n, p) 14 C reactions. Nitrogen, however, is a challenging operating gas for proportional counters and requires a high electric field strength to gas pressure ratio. Benefiting from the latest advances in spherical proportional counter instrumentation and simulation techniques, we report first neutron measurements at operating pressures of up to 1.8 bar. This achievement enhances the prospects of the spherical proportional counter to act as a neutron spectrometer appropriate for challenging environments, including underground laboratories, and industrial and medical settings.
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