Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Nuclear Stability

Nuclear Stability

Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together in the...

Types of Radioactivity

Types of Radioactivity

The most common types of radioactivity are α decay, β decay, γ decay, neutron emission, and electron capture.
Alpha (α) decay is the emission of an α particle from the nucleus. For example, polonium-210 undergoes α decay:

Radioactivity and Nuclear Equations

Radioactivity and Nuclear Equations

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...

¹³C NMR: ¹H–¹³C Decoupling

¹³C NMR: ¹H–¹³C Decoupling

The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...

Nuclear Transmutation

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: Nuclear Spin State Population Distribution

Atomic Nuclei: Nuclear Spin State Population Distribution

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.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Cellulose acetate-based polymer electrolyte for energy storage application with the influence of BaTiO<sub>3</sub> nanofillers on the electrochemical properties: A progression in biopolymer-EDLC technology.

International journal of biological macromolecules·2024

Same author

Proton Compton Scattering from Linearly Polarized Gamma Rays.

Physical review letters·2022

Same author

Erratum: Evolution of π^{0} Suppression in Au+Au Collisions from sqrt[s_{NN}]=39 to 200 GeV [Phys. Rev. Lett. 109, 152301 (2012)].

Physical review letters·2020

Same author

Translation Approach for Dentine Regeneration Using GSK-3 Antagonists.

Journal of dental research·2020

Same author

Intraductal Carcinoma of Salivary Gland Originating from an Intraparotid Lymph Node: A Case Report.

The Malaysian journal of pathology·2019

Same author

Beam Energy and Centrality Dependence of Direct-Photon Emission from Ultrarelativistic Heavy-Ion Collisions.

Physical review letters·2019

Search research articles

Related Experiment Video

Updated: Jun 18, 2026

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

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

Published on: May 3, 2019

Three-body nonmesonic weak decay of the (Lambda)12C hypernucleus.

M Kim¹, S Ajimura, K Aoki

¹Department of Physics and Astronomy, Seoul National University, Seoul, 151-747, Korea.

Physical Review Letters

|November 13, 2009

Summary

This summary is machine-generated.

Researchers measured the three-body process in Lambda12C weak decay, finding a branching ratio of 0.29+/-0.13. This study resolves long-standing puzzles regarding decay widths and successfully models nucleon distributions.

More Related Videos

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C₂, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

Study of Protein Dynamics via Neutron Spin Echo Spectroscopy

Study of Protein Dynamics via Neutron Spin Echo Spectroscopy

Published on: April 13, 2022

Related Experiment Videos

Last Updated: Jun 18, 2026

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

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

Published on: May 3, 2019

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C₂, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

Study of Protein Dynamics via Neutron Spin Echo Spectroscopy

Study of Protein Dynamics via Neutron Spin Echo Spectroscopy

Published on: April 13, 2022

Area of Science:

Nuclear Physics
Particle Physics
Hypernuclear Physics

Background:

Nonmesonic weak decay of hypernuclei provides insights into fundamental interactions.
Understanding the decay mechanisms of Lambda hypernuclei is crucial for nuclear structure studies.

Purpose of the Study:

To measure the branching ratio of the three-body process in Lambda12C nonmesonic weak decay.
To determine absolute decay widths (Gamma(n), Gamma(p), Gamma2N) and their ratios.
To reproduce key experimental distributions using a refined decay model.

Main Methods:

Analysis of nucleon and nucleon pair yields in Lambda12C decay.
Incorporation of measured final state interactions.
Simultaneous reproduction of nucleon energy distribution, two-nucleon angular correlation, and momentum sum distribution.

Main Results:

The branching ratio for the three-body process was determined to be 0.29+/-0.13.
Absolute decay widths Gamma(n), Gamma(p), and Gamma2N were successfully determined.
The model accurately reproduced experimental data, including nucleon energy and angular correlations.

Conclusions:

The inclusion of the three-body process is essential for a complete understanding of Lambda12C nonmesonic weak decay.
This study resolves long-standing puzzles concerning the relative ratios of decay widths.
The findings validate the employed model and enhance our comprehension of weak interactions in hypernuclei.