Optical shape analysis based on discrete Fourier transform and second-order moment analysis of the brightness distribution for the detection of sub-micron range tracks in nuclear emulsion

Optical shape analysis based on discrete Fourier transform and second-order moment analysis of the brightness distribution for the detection of sub-micron range tracks in nuclear emulsion
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基于离散傅里叶变换的光学形状分析和亮度分布的二阶矩分析,用于检测核乳剂中的亚微米范围轨迹

DOI:
10.1093/ptep/ptaa132
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发表时间:
2020
影响因子:
3.5
通讯作者:
Asada Takashi
Asada Takashi
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Umemoto Atsuhiro;Naka Tatsuhiro;Nakano Toshiyuki;Kobayashi Ryuta;Shiraishi Takuya;Asada Takashi

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为了识别记录在超细颗粒核乳胶(纳米成像跟踪器)中的亚微米范围的低能轨道,设计了椭圆拟合方法来分析由光学显微镜拍摄的各向异性图像。我们报告这个新开发的方法,使用离散傅立叶变换和二阶矩分析的亮度分布。我们成功地降低了椭圆率阈值,从而提高了选择效率和角分辨率。值得注意的是,探测碳30 keV径迹的成功是世界上第一个这样的成就,其中碳30 keV离子的入射方向被确定,精度为41,效率为。
To recognize sub-micron-range low-energy tracks recorded in a super-fine-grained nuclear emulsion (Nano Imaging Tracker), an elliptical fitting method was devised to analyze anisotropic images taken by an optical microscope. We report on this newly developed method using a discrete Fourier transform and second-order moment analysis of the brightness distribution. We succeeded in lowering the ellipticity threshold, thereby improving the selection efficiency and angular resolution. Notably, the success of detecting carbon 30 keV tracks is the first such achievement in the world, where the incident direction of carbon 30 keV ions was determined with an accuracy of 41and an efficiency of.
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