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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

215
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....
215
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

161
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...
161
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

379
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
379
Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

112
Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
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相关实验视频

Updated: Jun 29, 2025

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
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使用快速脉冲成型的LaBr3(Ce) 闪电器进行高速马光谱学.

Tianyi Ren, Soo Hyun Byun

    Health physics
    |March 25, 2024
    PubMed
    概括

    这项研究优化了甲 (LaBr3(Ce)) 玛光谱仪的高计数率. 消除前放大器显著改善了系统停机时间,提高了高达150kcps的性能.

    科学领域:

    • 核光谱学是指核光谱学.
    • 马射线检测检测 马射线检测

    背景情况:

    • 兰他化物 (LaBr3(Ce)) 闪器对于玛射线光谱学至关重要.
    • 由于死亡时间的增加,高计数率对光谱仪的性能构成挑战.

    研究的目的:

    • 在高输入计数速率 (高达1.3 Mcps) 下评估LaBr3(Ce) 玛光谱仪的性能.
    • 通过修改信号处理链来提高光谱仪的速度和能量分辨率.

    主要方法:

    • 一个LaBr3(Ce) 玛光谱仪的预放大器被移除,直接将光倍增管信号输送到数字脉冲处理系统.
    • 脉冲成型参数以1.5kcps优化,随后使用137Cs来源以各种计数速度 (1.5kcps到1.3mcps) 进行测量.

    主要成果:

    • 光谱仪表现出了非常好的性能,直至输入计数率为150kcps.
    • 系统停机时间在150kcps以上迅速增加,但通过移除前放大器而显著减少.

    结论:

    • 取消预放大器大大改善了LaBr3{\displaystyle LaBr3{\displaystyle LaBr3{\displaystyle Ce} } 马光谱仪的系统死亡时间.
    • 修改后的系统为高计数率应用在玛射线光谱学中提供了增强的性能.

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