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Related Concept Videos

Nuclear Stability03:18

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...
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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...
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Nuclear Overhauser Enhancement (NOE)

Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically bonded or involved in J-coupling. This phenomenon, called the nuclear Overhauser enhancement (NOE), results from through-space interactions between the nuclear spins. The NOE effect decreases with increasing internuclear distance and is generally not observed beyond 4 angstroms. In NOE, dipole-dipole interactions between neighboring spin-active...
Atomic Nuclei: Nuclear Relaxation Processes01:23

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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...
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Related Experiment Video

Updated: May 20, 2026

Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions
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Published on: May 27, 2021

Nuclear structure experiments along the neutron drip line.

T Baumann1, A Spyrou, M Thoennessen

  • 1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824-1321, USA. baumann@nscl.msu.edu

Reports on Progress in Physics. Physical Society (Great Britain)
|July 14, 2012
PubMed
Summary
This summary is machine-generated.

Investigating neutron-rich nuclei using invariant mass measurements and breakup reactions reveals nuclear structure effects at the nuclear existence limit. This research utilizes advanced detection methods for unbound states and provides insights into future nuclear physics research opportunities.

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Last Updated: May 20, 2026

Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions
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Area of Science:

  • Nuclear Physics
  • Nuclear Structure
  • Exotic Nuclei

Background:

  • Studies of neutron-rich nuclei probe the limits of nuclear existence.
  • Understanding nuclear structure requires examining nuclei far from stability.
  • Invariant mass measurements and breakup reactions are key experimental techniques.

Purpose of the Study:

  • To investigate nuclear structure effects in neutron-rich nuclei.
  • To present methods for studying neutron-unbound states.
  • To highlight future opportunities in nuclear physics research.

Main Methods:

  • Utilizing invariant mass measurements and breakup reactions.
  • Detecting neutrons in coincidence with fragments at 100-1000 MeV/u.
  • Employing charged particle and gamma-ray coincidence measurements.

Main Results:

  • Presented examples of results in light nuclei.
  • Demonstrated the effectiveness of coincidence measurements.
  • Provided insights into nuclear structure at the drip line.

Conclusions:

  • Invariant mass and breakup reactions are crucial for studying exotic nuclei.
  • Advanced detection techniques enable the exploration of neutron-unbound states.
  • Future facilities and detectors will expand research capabilities in nuclear structure.