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

Nuclear Transmutation03:20

Nuclear Transmutation

17.4K
Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed...
17.4K
Radioactive Decay and Radiometric Dating02:48

Radioactive Decay and Radiometric Dating

33.1K
Radioactivity is a spontaneous disintegration of an unstable nuclide and is a random process, as all the nuclei in the sample do not decay simultaneously. The number of disintegrations per unit time is called the activity (A), which is directly proportional to the number of nuclei in the sample. The decay constant (λ) is an average probability of decay per nucleus in unit time.
33.1K

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

Modeling CO<sub>2</sub> Hydrogenation to Methanol on an Ensemble of Inverse ZrO<sub>2</sub> on Cu Catalytic Sites: Mechanism, Reactivity, and Deactivation.

Angewandte Chemie (International ed. in English)·2026
Same author

Cation-Limited Hydroxide Anion Diffusion Drives Asymmetric Hydrogen Kinetics on Transition-Metal Decorated Platinum Surface.

Journal of the American Chemical Society·2026
Same author

Lunar silicon cavity.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

What can Raman spectroscopy really say about the adsorbed CO on roughened Cu electrodes in CO<sub>2</sub> electroreduction conditions?

Faraday discussions·2026
Same author

A protein-based model of carbon monoxide dehydrogenase exhibits tunable covalency across cluster oxidation and ligand-bound states.

Chemical science·2026
Same author

Low-Temperature Non-Oxidative Coupling of Methane on Atomically Dispersed Titanium-Aluminum-Boron Nanopowder.

Journal of the American Chemical Society·2026
Same journal

Retraction Note: NSD2 targeting reverses plasticity and drug resistance in prostate cancer.

Nature·2026
Same journal

Enhanced B cell priming induces broadly neutralizing HIV-1 apex antibodies.

Nature·2026
Same journal

Vaccination elicits HIV broadly neutralizing antibodies in primates.

Nature·2026
Same journal

Child online safety needs more than social-media bans.

Nature·2026
Same journal

Ebola preparedness must start with ecosystems and before humans show symptoms.

Nature·2026
Same journal

AI tools can speed up thinking, but evidence still comes from the lab bench.

Nature·2026
查看所有相关文章

相关实验视频

Updated: Jun 4, 2025

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

6.6K

固态核时钟的薄膜

Chuankun Zhang1, Lars von der Wense1,2, Jack F Doyle1

  • 1JILA, NIST and University of Colorado, Department of Physics, University of Colorado, Boulder, CO, USA.

Nature
|December 18, 2024
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种用于核钟的-229 (229Th) 薄膜的新方法. 这种可扩展的方法使用微克量的229Th,减少放射性,并使现场部署的固态核钟成为可能.

更多相关视频

Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
08:43

Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides

Published on: May 20, 2019

6.5K
Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films
12:22

Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films

Published on: November 9, 2015

11.3K

相关实验视频

Last Updated: Jun 4, 2025

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

6.6K
Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides
08:43

Separation of Uranium and Thorium for 230Th-U Dating of Submarine Hydrothermal Sulfides

Published on: May 20, 2019

6.5K
Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films
12:22

Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films

Published on: November 9, 2015

11.3K

科学领域:

  • 核物理
  • 量子光学
  • 材料科学

背景情况:

  • -229 (229Th) 核异构过渡是下一代核钟的一个有希望的候选.
  • 由于材料稀缺,放射性和复杂的处理,目前使用229Th合晶体的方法面临挑战.
  • 在229Th光谱学的进步需要各种应用的可扩展和强大的目标材料.

研究的目的:

  • 开发一种可扩展和高效的方法来准备229Th光谱目标.
  • 证明使用229ThF4薄膜用于核时钟的可行性.
  • 减少基于229Th的技术所需的放射性材料的数量.

主要方法:

  • 使用物理蒸汽沉积培养了-229四化物 (229ThF4) 的薄膜.
  • 在229ThF4薄膜内对229Th核过渡进行激光激发.
  • 将229ThF4薄膜的放射性与传统的229Th合晶体进行了比较.

主要成果:

  • 在229ThF4薄膜中成功演示了229Th核过渡的激光激发.
  • 薄膜方法只需要微克的229Th材料,比以前的方法少得多.
  • 229ThF4薄膜与光子平台和纳米制造兼容,使集成设备成为可能.
  • 放射性水平比典型的229Th合晶体低三倍.
  • 229ThF4的高核发射密度为量子光学研究提供了可能性.

结论:

  • 229ThF4薄膜的物理蒸汽沉积为229Th光谱目标提供了可扩展的解决方案.
  • 这种方法为集成的,可在现场部署的,具有减少放射性的固态核钟铺平了道路.
  • 开发的薄膜具有推动核钟技术和量子光学研究的潜力.