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相关概念视频

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

3.3K
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
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Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

4.4K
Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for...
4.4K
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

993
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
993
UV–Vis Spectroscopy: Woodward–Fieser Rules01:29

UV–Vis Spectroscopy: Woodward–Fieser Rules

28.0K
UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given structure by adding the...
28.0K
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

1.5K
An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
1.5K
IR Spectrometers01:25

IR Spectrometers

2.2K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
2.2K

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相关实验视频

Updated: Jan 8, 2026

A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
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A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer

Published on: April 12, 2017

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分散补偿罗兰光谱仪:对的影响 VB-RIXSS

Martin Sundermann1, Manuel Harder2, Ayman H Said3

  • 1Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.

Journal of synchrotron radiation
|December 11, 2025
PubMed
概括
此摘要是机器生成的。

优化价值带共振无弹性X射线散射 (VB-RIXS) 仪器至关重要. 这项研究表明,匹配源和光谱仪分散,而不是发生带宽,可以在X射线VB-RIXS中实现高分辨率.

关键词:
在IRIXS的光线线上.佩特拉三世,德西 在里克斯 (RIXS) 是一个指令.罗兰光谱仪 罗兰光谱仪在VB-RIXSS中使用VB-RIXS

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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
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X-ray Beam Induced Current Measurements for Multi-Modal X-ray Microscopy of Solar Cells
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A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
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科学领域:

  • 频谱学是一种光谱学.
  • 材料科学 材料科学 材料科学
  • 在X射线物理中,X射线物理

背景情况:

  • 价值带共振无弹性X射线散射 (VB-RIXS) 是研究电子结构的一种强大技术.
  • 在VB-RIXS中实现高总能量分辨率 (ΔEtot) 是具有挑战性的,因为它的流量有限性质.
  • 目前的方法通常涉及将光谱仪规格与事件带宽 (ΔEi) 相匹配,这可以通过计数率来限制.

研究的目的:

  • 为了研究在高流量和大线性分散的条件下,一个柔软的X射线罗兰光谱仪的性能.
  • 在VB-RIXS实验中确定实现高内在分辨率 (ΔEa) 的最佳参数.
  • 探索光谱仪在不同原子边缘应用的可调性.

主要方法:

  • 详细的射线跟踪模拟被执行在一个温柔的X射线罗兰光谱仪.
  • 该研究侧重于U M5边缘 (3551 eV) 作为一个特定的案例.
  • 实验数据被用来验证光线追踪的发现.

主要成果:

  • 高内在分辨率 (ΔEa) 可以通过将X射线源的线性分散与光谱仪的线性分散相匹配,以相反的标志来实现.
  • 当分散得到正确匹配时,事件带宽 (ΔEi) 变得无关紧要.
  • 实验验证证证实了48 meV的总能量分辨率 (ΔEtot) (ΔEa = 44 meV).

结论:

  • 这些发现挑战了在VB-RIXS中匹配事件带宽的传统方法.
  • 展示了一种通过控制线性分散来优化VB-RIXS分辨率的新方法.
  • 散射速率的可调性确保了这种方法对各种原子边缘的适用性,从而提高了其多功能性.