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Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

259
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.
259
Atomic Force Microscopy01:08

Atomic Force Microscopy

3.3K
Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
3.3K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

41.5K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing...
41.5K
Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

519
The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
519
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration01:16

IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration

1.1K
A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
According to Hooke's law, the vibrational frequency is directly proportional to...
1.1K
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

112
In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
112

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相关实验视频

Updated: May 8, 2025

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
12:19

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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双开放原子干涉计用于紧型和移动型量子传感.

Yosri Ben-Aïcha1, Zain Mehdi1, Christian Freier2

  • 1The Australian National University, Department of Quantum Science and Technology, Canberra, Australian Capital Territory 2601, Australia.

Physical review letters
|January 29, 2025
PubMed
概括
此摘要是机器生成的。

我们为动态平台开发了一种新的原子干扰仪协议. 这种方法精确地测量引力潮,为惯性测量实现长期稳定性.

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Compact Quantum Dots for Single-molecule Imaging
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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相关实验视频

Last Updated: May 8, 2025

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
12:19

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

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Compact Quantum Dots for Single-molecule Imaging
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Compact Quantum Dots for Single-molecule Imaging

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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科学领域:

  • 原子物理 原子物理
  • 量子传感是一种量子感应.
  • 地质物理学 地质物理学

背景情况:

  • 原子干涉计是一种精确的测量技术.
  • 在动态平台上运行原子干扰仪存在挑战.
  • 以前的方法在初始速度依赖和长期稳定性方面遇到了困难.

研究的目的:

  • 展示一个适用于动态平台的原子干扰仪协议.
  • 为了实现精确的惯性量测量,具有长期稳定性.
  • 为了克服原子干涉测量的初始速度依赖.

主要方法:

  • 从单个原子源中利用了两个开放的干扰仪.
  • 采用不同的审讯时间来取消初始速度效应.
  • 通过测量引力潮来验证协议.

主要成果:

  • 在2000次运行 (6.7小时) 中达到4.5μGal的精度.
  • 在开放原子干涉测试中证明了长期相位稳定性.
  • 在动态平台上成功测量了惯性量.

结论:

  • 开发的协议与动态平台兼容.
  • 这项工作代表了第一个用稳定的开放原子干涉度测量惯性量测量的演示.
  • 该方法为地球物理测量提供了高精度和准确性.