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関連する概念動画

Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...
The Antenna Complex01:15

The Antenna Complex

Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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.
Atomic Fluorescence Spectroscopy01:29

Atomic Fluorescence Spectroscopy

Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which are...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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.

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関連する実験動画

Updated: Jul 12, 2026

Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2
11:27

Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2

Published on: December 8, 2016

ラジオソース:シンチレーション研究から得られた角形の大きさ.

M H Cohen, E J Gundermann, H E Hardebeck

    Science (New York, N.Y.)
    |August 12, 1966
    PubMed
    まとめ
    この要約は機械生成です。

    惑星間シンチレーション分析は,無線源の直径を推定するための繊細な方法を提供します. このテクニックは,3C 138や3C 273のようなソースに対して,ラジオインターフェロメトリーや月面遮蔽よりも高い解像度を達成しました.

    さらに関連する動画

    Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
    06:14

    Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

    Published on: July 30, 2020

    Scattering And Absorption of Light in Planetary Regoliths
    11:34

    Scattering And Absorption of Light in Planetary Regoliths

    Published on: July 1, 2019

    関連する実験動画

    Last Updated: Jul 12, 2026

    Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2
    11:27

    Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2

    Published on: December 8, 2016

    Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
    06:14

    Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

    Published on: July 30, 2020

    Scattering And Absorption of Light in Planetary Regoliths
    11:34

    Scattering And Absorption of Light in Planetary Regoliths

    Published on: July 1, 2019

    科学分野:

    • 天文学と天体物理学について
    • ラジオ天文学 ラジオ天文学

    背景:

    • 銀河外放射源の角径を推定することは,それらの物理的性質を理解するために極めて重要です.
    • ラジオインターフェロメトリーや月面隠蔽などの以前の方法は,解像度の制限があります.

    研究 の 目的:

    • コンパクトな無線源の角の大きさを測定するための惑星間シンチレーション (IPS) の可能性を調査する.
    • IPSによって達成された解像度を既存の技術と比較する.

    主な方法:

    • 惑星間シンチレーションによって引き起こされる変動の周波数スペクトルを分析する.
    • IPSを使用して特定の無線源 (3C 138,3C 245,3C 267,3C 273) を観測する.

    主要な成果:

    • 3C 138 (0.1アーチ秒),3C 245 (<=0.04アーチ秒),3C 267 (<=0.2アーチ秒),および3C 273 (<=0.02アーチ秒) の角直径を決定した.
    • ラジオインターフェロメーターや月面遮蔽で以前より少なくとも5倍高い解像度を達成しました.

    結論:

    • 惑星間シンチレーションは,無線源の直径を推定するための,敏感で高解像度な方法を提供します.
    • IPS技術は,無線源の小さな角形の構造を解明する上で大きな進歩をもたらします.