薄膜中子转换器的解析模型及其在热中子气体探测器中的应用

转换膜中子探测器的gamma-ray灵敏度研究

Investigation of gamma-ray sensitivity of neutron detectors based on thin converter films

目前，许多用于热中子探测的探测器技术正在开发中，以降低对稀有3He气体的需求。采用气体正比计数器法读出的固体薄膜中子转换器气体探测器已被推荐作为大面积覆盖应用的合适选择。本文研究了γ射线在中子测量中产生假计数的概率。模拟结果与10 B薄膜原型和3He探测器的测量结果进行了比较。结果表明，采用这种新技术可以达到与3He管相当的γ射线抑制率。这里提出的论点和结果也适用于具有转换器而不是固体10B层的气体探测器，例如6Li层和10BF3气体。

DECal, a Python tool for the efficiency calculation of thermal neutron detectors based on thin-film converters

The Detector Efficiency Calculator (DECal) is a series of Python functions and tools designed to analytically calculate, visualise and optimise the detection efficiency of thermal neutron detectors, which are based on thin-film converters. The implementation presented in this article concerns 10B-based detectors in particular. The code can be run via a graphical user interface, as well as via the command line. The source code is openly available to interested users via a GitHub repository.

钆箔复合转换器热中子记录效率的计算

Calculations of the Efficiency of Registration of Thermal Neutrons by Complex Converters Constructed on the Basis of Gadolinium Foils

我们认为，由转换器，这是由天然钆及其157同位素箔登记热中子的效率建模的结果。计算了中子以不同角度落向转换器平面时的效率。它示出，在小角度的中子下降到一个平面的转换器，它是可能的接收登记接近理论极限的效率。本文研究了由Kapton支撑膜和在其两侧分层的钆转换器组成的复合转换器的效率。所有的计算都是针对四个固定的中子能量进行的，它们对应于波长1、1.8、3和4 $Å$。

Measurement of Excess Noise in Thin Film and Metal Foil Resistor Networks

Low-frequency resistance fluctuations cause excess noise in biased resistors. The magnitude of these fluctuations varies significantly between different resistor types. In this work measurements of excess noise in precision thin film and metal foil resistor networks are presented. The lowest levels were found in metal foil devices, followed by thin film NiCr networks deposited on silicon substrates. Higher excess noise with a significant spread between different types was seen in thin film devices deposited on ceramic substrates.