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関連する概念動画

Electron Configuration of Multielectron Atoms03:26

Electron Configuration of Multielectron Atoms

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The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...
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Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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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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Valence Bond Theory02:42

Valence Bond Theory

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Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

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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...
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Interaction of EM Radiation with Matter: Spectroscopy01:12

Interaction of EM Radiation with Matter: Spectroscopy

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Electromagnetic (EM) radiation can be considered an oscillating electric and magnetic field propagating through a medium that can interact with matter in its path. The electric field in the radiation can interact with electrical charges in the atoms or molecules in the matter. On the other hand, the magnetic field can interact with the magnetic field in the atomic nucleus. The study of the interaction between electromagnetic radiation and matter is termed spectroscopy. Spectroscopy is the study...
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Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

839
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.
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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
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アインシュタイン複合体の構造とスペクトル学的特徴

Korey P Carter1, Katherine M Shield1,2, Kurt F Smith1

  • 1Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.

Nature
|February 4, 2021
PubMed
まとめ

研究者らは,高度なスペクトロスコピーを用いてアインシュタイン (Es) 協調複合体を特徴付けました. この研究により 珍しい放射性トランスプルトニウム元素の 独特の電子構造と 発光特性が明らかになりました

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Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization
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Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization

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Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
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Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

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関連する実験動画

Last Updated: Nov 18, 2025

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
07:24

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Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization
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Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization

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Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
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科学分野:

  • 核化学
  • 材料科学
  • スペクトロスコーピー

背景:

  • トランスプルトニウム元素 (原子番号95−103) は,周期表の端にあるため,独特の化学的および物理的性質を備えている.
  • アインシュタイン (Es) のような重元素の希少性と放射能は,古典的な研究を制限する.
  • 移行金属とランタノイドの伝統的な予測モデルは,トランスプルトニウム元素にはあまり適用されない.

研究 の 目的:

  • 最小のサンプル量を用いてアインシュタイン (Es) の調整複合体を特徴付ける.
  • アインシュタインの電子構造と発光性を研究する
  • 重いアクティニド元素の結合と結合の仕組みを理解する.

主な方法:

  • L3エッジのエネルギーと結合距離を決定するX線吸収スペクトロスコーピー (XAS).
  • 発光と金属複合効果を分析するための光物理測定.
  • 254Esの<200ナノグラムを使用したヒドロキシピリジノンリガンドによるアインシュタイン調整複合体の合成と特徴付け.

主要な成果:

  • L3エッジエネルギーとアインシュタイン金属結合距離を決定した.
  • 観測されたEsIII発光のアンテナ感受性.
  • 金属の複合化でヒプソクロミックシフトが報告された アクティニドの新発見
  • ラッセル・サウンダーズ結合よりも j-j結合を好む中間のスピン-軌道結合の証拠を提供した.

結論:

  • この研究は,アインシュタインの電子構造と結合に関する重要な洞察を提供します.
  • 発見は,より軽いアナログと異なる重いアクティニドの j-j カップリングの流行を強調しています.
  • 希少で放射性アクティニド元素の独特な行動に関する継続的な研究の必要性を強調しています.