相关实验视频
Updated: Jul 1, 2025

10:42
Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
Published on: May 3, 2019
6.7K
在FRIB的Pt碎片化中观察新的同位素
O B Tarasov1, A Gade1,2, K Fukushima1
1Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.
Physical review letters
|March 1, 2024
概括
科学家们使用罕见同位素束设施 (FRIB) 发现了五种新同位素,包括Tm-182,Tm-183,Yb-186,Yb-187和Lu-190. 这一突破突显了FRIB的突破.
科学领域:
- 核物理 核物理 核物理
- 同位素研究研究 同位素研究
- 粒子加速器中的粒子加速器
背景情况:
- 寻找新的同位素对于了解核结构和天体物理过程至关重要.
- 稀有同位素束设施 (FRIB) 是一座为生产和研究异国情调核而设计的最先进的设施.
- 先进的分离技术对于在其他反应产品的高背景中识别短寿命,稀有同位素至关重要.
研究的目的:
- 发现和识别以前未知的同位素使用高强度的罕见同位素束.
- 展示先进的稀有同位素分离器 (ARIS) 在生产和识别新元素方面的能力.
- 展示罕见同位素束装置 (FRIB) 在运行开始后不久的早期科学潜力.
主要方法:
- 通过198Pt束与碳目标在186 MeV/u的相互作用产生新的同位素.
- 使用新型两级高级稀有同位素分离器 (ARIS) 分离和识别同位素.
- 通过测量能量损失,飞行时间,磁刚性和总动能,逐事件确定粒子.
主要成果:
- 成功生产,分离并确定了五种新同位素: 182,183Tm, 186,187Yb和190Lu.
- 通过ARIS分离器实现了高分辨率功率和污染物束的抑制.
- 证明了FRIB的发现潜力,其主要光束功率为1.5kW.
结论:
- 这些新同位素的发现验证了FRIB和ARIS分离器的能力.
- 这一成就标志着核风景探索的重要一步.
- FRIB准备成为罕见同位素研究的领先设施,未来的潜力为400千瓦的光束功率.
相关概念视频
Nuclear Transmutation
17.5K
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...
17.5K
Mass Spectrometry: Molecular Fragmentation Overview
3.1K
The ionization of a molecule into a molecular ion inside the mass spectrometer causes instability in the molecule's structure due to the loss of an electron. This eventually leads to the fragmentation or breaking of some bonds in the molecule. The fragmentation occurs predominantly at specific bonds to yield relatively stable fragments.
One type of fragmentation pattern is the cleavage of a single bond in the molecular ion. The cleavage leads to a radical and a cation. The cleavage can...
One type of fragmentation pattern is the cleavage of a single bond in the molecular ion. The cleavage leads to a radical and a cation. The cleavage can...
3.1K
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
1.1K
When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
1.1K
Mass Spectrometry: Branched Alkane Fragmentation
1.0K
This lesson delves into the mass spectrometry of branched alkane fragmentation. Branched alkanes possess secondary or tertiary carbon atoms, which generate relatively stable carbocations if the cleavage occurs at the branching point. The high stability of carbocations drives the instant fragmentation of branched alkanes. Accordingly, the branched alkane's molecular ion peak is very weak or invisible in the mass spectra, especially in comparison to a linear alkane.
1.0K
Nuclear Fission
9.7K
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...
9.7K
Isotopes and Radioisotopes
8.6K
In the early 1900s, English chemist Frederick Soddy realized that an element could have atoms with different masses that were chemically indistinguishable. These different types are called isotopes — atoms of the same element that differ in mass. Isotopes differ in mass because they have different numbers of neutrons but are chemically identical because they have the same number of protons. Soddy was awarded the Nobel Prize in Chemistry in 1921 for this discovery.
An isotope containing...
An isotope containing...
8.6K

