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相关概念视频

Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

2.0K
The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
2.0K
Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview01:19

Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview

2.7K
In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then...
2.7K
Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

2.4K
Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
2.4K
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

1.1K
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
1.1K
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

873
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
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相关实验视频

Updated: May 3, 2026

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
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在CSNS的电网电离室中使用改进的带光粒子识别方法 Back-n 白中子源.

Hai-Zheng Chen1, Juan Liu2, Ruirui Fan3

  • 1Department of Nuclear Science and Technology, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China; Institute of High Energy Physics, Chinese Academy of Sciences (CAS), Beijing 100049, China; Spallation Neutron Source Science Center (SNSSC), Dongguan, 523803, China.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine
|February 17, 2026
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概括

这项研究引入了一种新方法,用于准确测量高中子流量设施的粒子产量. 它对同时发生的粒子事件进行校正,提高核反应研究的数据准确性.

关键词:
在CSNS背后的白色中子源.这是一个双重三重音.电网电离室的电网电离室进行多参数分析.粒子识别 粒子识别

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In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis
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In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis

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Nanoparticle Tracking Analysis of Gold Nanoparticles in Aqueous Media through an Inter-Laboratory Comparison
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相关实验视频

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Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
14:11

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In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis
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In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis

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Nanoparticle Tracking Analysis of Gold Nanoparticles in Aqueous Media through an Inter-Laboratory Comparison
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科学领域:

  • 核物理 核物理 核物理
  • 探测器技术 探测器技术
  • 粒子物理学 粒子物理学

背景情况:

  • 位于中国分裂中子源 (CSNS) 的带光粒子探测器阵列 (LPDA) 由于高中子流量而面临事件堆积.
  • 现有的Li6反应道的方法低估了粒子产量,因为它们忽略了同时发生的三事件.

研究的目的:

  • 开发一种新的方法来解决高流量环境中的堆积事件.
  • 通过同时检测粒子来准确量化颗粒产量.

主要方法:

  • 开发了一个新的函数g,R,E,以将粒子能量 (E) 与电离范围 (R,E) 相关联.
  • 对从0.3 eV到1 MeV的中子能量数据进行了多参数分析.
  • 使用统计分布来提取双重三重事件的比例.

主要成果:

  • 双重三重音事件被确定为3.4%的总数.
  • 特里顿事件占总数的94.6%.
  • 无效事件占总数的2%.

结论:

  • 提出的方法在高流量条件下成功地解决了堆积事件.
  • 这项工作为在核反应堆和加速器驱动系统等高速环境中探测器设计提供了可行的方法.