Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Atomic Spectroscopy: Effects of Temperature01:27

Atomic Spectroscopy: Effects of Temperature

845
Atomization, converting samples into gas-phase atoms and ions, is essential for atomic spectroscopy. The flame temperature required for atomization affects the efficiency of the atomic spectroscopic methods by increasing the atomization efficiency and the relative population of the excited and ground states.
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature...
845
Absorption of Radiation01:05

Absorption of Radiation

1.2K
The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:
1.2K
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

1.6K
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...
1.6K
Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

1.1K
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...
1.1K
Radioactivity and Nuclear Equations03:18

Radioactivity and Nuclear Equations

26.9K
Nuclear chemistry is the study of reactions that involve changes in nuclear structure. The nucleus of an atom is composed of protons and, except for hydrogen, neutrons. The number of protons in the nucleus is called the atomic number (Z) of the element, and the sum of the number of protons and the number of neutrons is the mass number (A). Atoms with the same atomic number but different mass numbers are isotopes of the same element.
A nuclide of an element has a specific number of protons and...
26.9K
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

2.3K
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
2.3K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Revisiting collisional broadening of <sup>85</sup>Rb Rydberg levels: conclusions for vapor cell manufacture.

Physical review applied·2026
Same author

Imaging cell phone radiation in tissue mimics with hyperpolarized low-field MRI.

Science advances·2026
Same author

Multichannel, ultra-wideband Rydberg electrometry with an optical frequency comb.

Nature communications·2025
Same author

Efficient production of sodium Bose-Einstein condensates in a hybrid trap.

The Review of scientific instruments·2025
Same author

The Rayleigh-Taylor instability in a binary quantum fluid.

Science advances·2025
Same author

Effect of glancing collisions in the cold-atom vacuum standard.

Physical review. A·2025

相关实验视频

Updated: Jan 18, 2026

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
09:18

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

Published on: December 14, 2017

10.9K

用于辐射温度计的原子和分子系统.

Stephen Eckel1, Christopher Holloway2, Eric Norrgard1

  • 1Sensor Sciences Division, National Institute of Standards and Technology Physical Measurement Laboratory, Gaithersburg, MD, USA.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences
|January 15, 2026
PubMed
概括

研究人员开发了新的原子传感器,用于辐射温度测量. 这些设备利用激光冷却的原子精确测量黑体辐射,为改善温度标准铺平了道路.

关键词:
里德伯格原子是一个原子.黑体辐射的辐射是黑体的辐射.主要温度计的主要温度计.辐射温度计 辐射温度计测温仪测温仪使用方法

更多相关视频

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
10:42

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

Published on: May 3, 2019

7.3K
Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere
08:52

Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere

Published on: April 30, 2018

8.6K

相关实验视频

Last Updated: Jan 18, 2026

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
09:18

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

Published on: December 14, 2017

10.9K
Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
10:42

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

Published on: May 3, 2019

7.3K
Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere
08:52

Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere

Published on: April 30, 2018

8.6K

科学领域:

  • 量子物理学 量子物理学 是一种量子物理学.
  • 计量学 计量学 计量学
  • 原子物理 原子物理

背景情况:

  • 原子和分子为开发精确的测量标准和传感器提供了独特的特性.
  • 量子力学决定了原子的性质,使它们成为基本测量的理想选择.
  • 辐射温度测量在科学和工业应用中至关重要.

研究的目的:

  • 用原子和分子创建辐射温度标准和传感器的新概念.
  • 介绍两个不同的基于原子的温度测量系统的实验结果.
  • 详细说明用于解释实验数据的理论框架,包括速率方程模型.

主要方法:

  • 使用冷原子温度计 (CAT) 中的激光冷却的85Rb瑞德伯格原子,探测130GHz附近的黑体辐射 (BBR).
  • 使用一个紧的BBR原子传感器 (CoBRAS) 与85Rb蒸汽监测与BBR相关的光在24.5 THz附近.
  • 应用速率方程模型来解释原子过渡和BBR之间的相互作用.

主要成果:

  • 在CAT取得了初级温度测量与大约1%的不确定性,并有可能进一步降低.
  • 科布拉斯在测量黑体光谱时表现出极好的u(T) ≈0.13K的相对精度.
  • 这两项实验都展示了原子系统的可行性,用于精确的辐射温度确定.

结论:

  • 原子和分子可以作为新的标准和辐射温度传感器的基础元素.
  • 开发的冷原子温度计和紧的BBR原子传感器代表了初级温度计的重大进步.
  • 这些基于原子的方法为重新定义符合量子原理的温度测量提供了有希望的途径.