Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Nuclear Fission02:50

Nuclear Fission

Many heavier elements with smaller binding energies per nucleon can decompose into more stable elements that have intermediate mass numbers and larger binding energies per nucleon—that is, mass numbers and binding energies per nucleon that are closer to the “peak” of the binding energy graph near 56. Sometimes neutrons are also produced. This decomposition of a large nucleus into smaller pieces is called fission. The breaking is rather random with the formation of a large number of different...
Nuclear Fusion02:45

Nuclear Fusion

The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
Nuclear Transmutation03:20

Nuclear Transmutation

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 protons being...
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis. This...
Consecutive Reactions01:22

Consecutive Reactions

Consecutive reactions involve a sequence where the product of a preceding reaction becomes the reactant for the subsequent one. In a simple scheme, A transforms into B, which further reacts to form C, with rate constants k1 and k2, respectively. This concept is evident in the radioactive decay series. Assuming an initial state with only A present, the conservation of matter leads to three coupled differential equations, determining the concentrations of A, B, and C over time.The rate of change...

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Enhancement of Damping in a Turbulent Atomic Bose-Einstein Condensate.

Physical review letters·2026
Same author

A non-invasive, sensitive assay for active TB: combined cell-free DNA detection and FluoroSpot assays.

The international journal of tuberculosis and lung disease : the official journal of the International Union against Tuberculosis and Lung Disease·2023
Same author

APSIC dental infection prevention and control (IPC) guidelines.

Antimicrobial resistance and infection control·2023
Same author

Characterization of rhodanine derivatives as potential disease-modifying drugs for experimental mouse osteoarthritis.

Osteoarthritis and cartilage·2022
Same author

Universal Early Coarsening of Quenched Bose Gases.

Physical review letters·2022
Same author

Defect Saturation in a Rapidly Quenched Bose Gas.

Physical review letters·2021

関連する実験動画

Updated: Jul 11, 2026

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space
14:19

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space

Published on: February 1, 2016

ボーゼ-アインシュタインの濃縮原子の連続的な源である.

A P Chikkatur1, Y Shin, A E Leanhardt

  • 1Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. ananth@mit.edu

Science (New York, N.Y.)
|June 22, 2002
PubMed
まとめ

科学者たちは,光学ピンチを使ってボース・アインシュタイン凝縮物の連続的な源を作り出した. この画期的な発見により,連続した原子レーザーを可能にし,100万個以上の原子を保持できます.

さらに関連する動画

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

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
07:55

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

Published on: September 22, 2017

関連する実験動画

Last Updated: Jul 11, 2026

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space
14:19

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space

Published on: February 1, 2016

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

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
07:55

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

Published on: September 22, 2017

科学分野:

  • 原子,分子,光学物理学
  • 量子光学とは,量子光学である.

背景:

  • ボーゼ・アインシュタイン凝縮物 (Bose-Einstein condensates,BECs) は,特異な性質を持つ物質の量子状態である.
  • 安定した,継続的なBECsの源を作り出すことは,原子レーザーなどのアプリケーションにとって非常に重要です.

研究 の 目的:

  • ボーゼ-アインシュタイン凝縮ナトリウム原子の連続的な源を開発する.
  • 連続した原子レーザーの実現可能性を評価する.

主な方法:

  • 光学ピンチを使って,新しいボース・アインシュタインコンデンサを供給する.
  • 光学二極トラップに閉じ込められたコンデンサートを定期的に補給する.
  • 高い原子群 (1×10^6以上の原子) を一貫して維持する.

主要な成果:

  • ボーゼ-アインシュタイン凝縮ナトリウム原子の連続的な源を成功裏に生成しました.
  • 源は一貫して1×10^6以上の原子を含んでいた.
  • 連続した原子生成のための実行可能な方法を示した.

結論:

  • 開発された連続源は,連続原子レーザーの実現に向けた重要な一歩です.
  • この方法は,ボゼ・アインシュタイン凝縮物の安定した高流量源を提供します.
  • 量子技術と精度測定のための新しい道を開く.