Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Other Nuclides: 31P, 19F, 15N NMR01:16

Other Nuclides: 31P, 19F, 15N NMR

888
Many organic, inorganic, and biological molecules contain spin-half nuclei such as nitrogen-15, fluorine-19, and phosphorus-31. As a result, NMR studies of these nuclei have found extensive applications in chemical and biological research.
While fluorine-19 and phosphorous-31 have high natural abundances (100%) and positive gyromagnetic ratios, nitrogen-15 has a low natural abundance and a negative gyromagnetic ratio. However, nitrogen-15 is still preferred over nitrogen-14 (which has a...
888
Nuclear Binding Energy02:13

Nuclear Binding Energy

12.3K
The difference between the calculated and experimentally measured masses is known as the mass defect of the atom. In the case of helium-4, the mass defect indicates a “loss” in mass of 4.0331 amu – 4.0026 amu = 0.0305 amu. The loss in mass accompanying the formation of an atom from protons, neutrons, and electrons is due to the conversion of that mass into energy that is evolved as the atom forms. The nuclear binding energy is the energy produced when the atoms’ nucleons...
12.3K
Nuclear Stability03:18

Nuclear Stability

20.5K
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...
20.5K
Nuclear Transmutation03:20

Nuclear Transmutation

12.9K
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...
12.9K
Atomic Nuclei: Nuclear Magnetic Moment00:59

Atomic Nuclei: Nuclear Magnetic Moment

3.0K
All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
3.0K
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

1.7K
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.
1.7K

You might also read

Related Articles

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

Sort by
Same author

Beta-Delayed Neutron Emission of N=84 ^{132}Cd.

Physical review letters·2026
Same author

Author Correction: An asymmetric fission island driven by shell effects in light fragments.

Nature·2025
Same author

First β-Delayed Two-Neutron Spectroscopy of the r-Process Nucleus ^{134}In and Observation of the i_{13/2} Single-Particle Neutron State in ^{133}Sn.

Physical review letters·2025
Same author

An asymmetric fission island driven by shell effects in light fragments.

Nature·2025
Same author

Revealing the Nature of yrast States in Neutron-Rich Polonium Isotopes.

Physical review letters·2025
Same author

Compound-Nucleus and Doorway-State Decays of β-Delayed Neutron Emitters ^{51,52,53}K.

Physical review letters·2024

Related Experiment Video

Updated: May 1, 2026

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
14:11

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Published on: March 29, 2016

26.2K

First observation of the unbound nucleus 15Ne.

F Wamers1, J Marganiec2, F Aksouh3

  • 1Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany and GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and ExtreMe Matter Institute EMMI and Research Division GSI, D-64291 Darmstadt, Germany and Frankfurt Institute for Advanced Studies FIAS, D-60438 Frankfurt am Main, Germany.

Physical Review Letters
|April 22, 2014
PubMed
Summary

The unbound proton-rich nucleus 15Ne was observed for the first time. Its ground state is unbound by 2.522 MeV and decays directly to 13O via two-proton emission.

More Related Videos

A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
07:52

A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer

Published on: April 12, 2017

15.6K
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

8.5K

Related Experiment Videos

Last Updated: May 1, 2026

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
14:11

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Published on: March 29, 2016

26.2K
A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
07:52

A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer

Published on: April 12, 2017

15.6K
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

8.5K

Area of Science:

  • Nuclear Physics
  • Exotic Nuclei Research
  • Nuclear Spectroscopy

Background:

  • Proton-rich nuclei are crucial for understanding nuclear stability limits.
  • The properties of extremely proton-rich nuclei provide insights into nuclear forces and structure.
  • 15Ne is a predicted unbound nucleus relevant to nuclear astrophysics.

Purpose of the Study:

  • To report the first experimental observation of the unbound nucleus 15Ne.
  • To characterize the ground state properties and decay modes of 15Ne.
  • To investigate the nuclear structure of 15Ne, particularly its proton configuration.

Main Methods:

  • Two-neutron knockout reactions were performed using a 500 MeV/u 17Ne beam.
  • The decay products of 15Ne were detected and analyzed to determine its unbound nature and decay channels.
  • Nuclear spectroscopy techniques were employed to determine the energy and configuration of the 15Ne ground state.

Main Results:

  • The ground state of 15Ne was confirmed to be unbound by 2.522(66) MeV.
  • The observed decay of 15Ne proceeds directly to 13O with simultaneous two-proton emission.
  • No evidence for sequential decay through intermediate 14F states was found.
  • The 15Ne ground state exhibits a strong (1s1/2)2 component (63(5)%) within the (sd) shell around 13O.

Conclusions:

  • The first experimental evidence for the unbound nucleus 15Ne has been established.
  • The decay characteristics of 15Ne provide constraints on nuclear models of exotic nuclei.
  • The determined nuclear structure of 15Ne offers insights into proton correlations in the (sd) shell.