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関連する概念動画

IR Spectrometers01:25

IR Spectrometers

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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...
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Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

957
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...
957
IR Spectroscopy: Molecular Vibration Overview01:24

IR Spectroscopy: Molecular Vibration Overview

2.8K
When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
2.8K
Applications of IR Spectroscopy: Overview01:11

Applications of IR Spectroscopy: Overview

1.1K
The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
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UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

1.8K
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
1.8K
UV–Vis Spectrometers01:14

UV–Vis Spectrometers

1.5K
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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関連する実験動画

Updated: Sep 10, 2025

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
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THz以下周波数のための冷凍連続波光学スペクトロメーター

L Rogić1, N Somun1, S Griffitt1,2

  • 1Department of Physics, Faculty of Science, University of Zagreb, Bijenička 32, HR-10000 Zagreb, Croatia.

The Review of scientific instruments
|August 26, 2025
PubMed
まとめ

感度が高い光学スペクトロメーターを 開発しました ミリメートル波の周波数 (50-1000GHz) で 感度が高い温度で 感度が高い光学スペクトロメーターを 開発しました この装置は,反射性の高い材料でも正確な吸収測定を可能にし,磁気特性を研究するのに理想的です.

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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
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A Simple Dewar/Cryostat for Thermally Equilibrating Samples at Known Temperatures for Accurate Cryogenic Luminescence Measurements
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科学分野:

  • 物理学
  • スペクトロスコーピー
  • 材料科学

背景:

  • ミリメートル波のスペクトロスコピーは 材料の特徴,特に磁気および電子特性を決定的に重要です.
  • 既存の計器は,特に冷凍温度では,感度,ダイナミックレンジ,および動作条件の制限に直面することが多い.

研究 の 目的:

  • ミリメートル波周波数 (50-1000GHz) の新型,高感度連続波光学スペクトロメーターの設計と発表.
  • 測定能力を向上させるため,冷凍温度で最適な性能を達成します.
  • 高い反射率を含む幅広い材料の正確な吸収係数測定を可能にします.

主な方法:

  • 幅広い周波数スペクトルにわたるミリ波放射を生成するために,近赤外線の光混合を使用します.
  • 試料の温度を直接測定することによって光学電力吸収を決定します.
  • 液体ヘリウム温度を含む冷凍温度での最適な性能のために設計されています.

主要な成果:

  • 吸収係数のダイナミックレンジは,冷凍温度で最大10^6に達する.
  • 非常に反射するサンプルでの測定に適していることを示します.
  • YTiO3における鉄磁共鳴,参照化合物の電子スピン共鳴,およびヴァン・デル・ワールズの磁気材料における反鉄磁共鳴を測定することによって,性能を検証した.

結論:

  • 開発された光学スペクトロメーターは,冷凍温度でのミリ波測定に前例のない感度とダイナミックレンジを提供します.
  • この装置は多用途で,様々な磁気材料に適用でき,高磁場環境と互換性があります.
  • この技術は,磁気共鳴の詳細な特徴づけを可能にすることで,凝縮物質物理学と材料科学の研究を進めています.