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

Positron Emission Tomography01:29

Positron Emission Tomography

7.6K
Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
7.6K
Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

618
Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
618
Induced-fit Model01:13

Induced-fit Model

89.7K
Most chemical reactions in cells require enzymes—biological catalysts that speed up the reaction without being consumed or permanently changed. They reduce the activation energy needed to convert the reactants into products. Enzymes are proteins, that usually work by binding to a substrate—a reactant molecule that they act upon.
Enzymes exhibit substrate specificity, meaning that they can only bind to certain substrates. This is mainly determined by the shape and chemical...
89.7K
Induced Pluripotent Stem Cells01:13

Induced Pluripotent Stem Cells

28.1K
Stem cells are undifferentiated cells that divide and produce different types of cells. Ordinarily, cells that have differentiated into a specific cell type are post-mitotic—that is, they no longer divide. However, scientists have found a way to reprogram these mature cells so that they “de-differentiate” and return to an unspecialized, proliferative state. These cells are also pluripotent like embryonic stem cells—able to produce all cell types—and are therefore...
28.1K
Induced Pluripotent Stem Cells01:06

Induced Pluripotent Stem Cells

5.6K
Stem cells are undifferentiated cells that divide and produce different cell types. Ordinarily, cells that have differentiated into a specific cell type are terminally differentiated; however, scientists have found a way to reprogram these mature cells so that they dedifferentiate and return to an unspecialized, proliferative state. These cells are pluripotent like embryonic stem cells—able to produce all cell types—and are called induced pluripotent stem cells (iPSCs).
Somatic...
5.6K
Induced Electric Dipoles01:28

Induced Electric Dipoles

4.8K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
4.8K

You might also read

Related Articles

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

Sort by
Same author

Design and operation of APEX-LD: A compact levitated dipole for a positron-electron experiment.

The Review of scientific instruments·2026
Same author

Injection, confinement, and diagnosis of electrons and positrons in a permanent magnet dipole trap.

The European physical journal. D, Atomic, molecular, and optical physics·2024
Same author

Attosecond formation of charge-transfer-to-solvent states of aqueous ions probed using the core-hole-clock technique.

Nature communications·2024
Same author

Injection and confinement of positron bunches in a magnetic dipole trap.

Physical review. E·2024
Same author

Radiation damage by extensive local water ionization from two-step electron-transfer-mediated decay of solvated ions.

Nature chemistry·2023
Same author

Ångstrom-Depth Resolution with Chemical Specificity at the Liquid-Vapor Interface.

Physical review letters·2023
Same journal

Erratum: Bacterial Turbulence at Compressible Fluid Interfaces [Phys. Rev. Lett. 136, 138301 (2026)].

Physical review letters·2026
Same journal

Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders.

Physical review letters·2026
Same journal

Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols.

Physical review letters·2026
Same journal

Topological Transition and Emergence of Elasticity of Dislocation in Skyrmion Lattice: Beyond Kittel's Magnetic-Polar Analogy.

Physical review letters·2026
Same journal

Pound-Drever-Hall Method for Superconducting-Qubit Readout.

Physical review letters·2026
Same journal

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026
See all related articles

Related Experiment Video

Updated: Feb 11, 2026

Cerenkov Luminescence Imaging of Interscapular Brown Adipose Tissue
06:28

Cerenkov Luminescence Imaging of Interscapular Brown Adipose Tissue

Published on: October 7, 2014

13.8K

Positron-Induced Luminescence.

E V Stenson1, U Hergenhahn1,2, M R Stoneking1,3

  • 1Max Planck Institute for Plasma Physics, 17491 Greifswald and 85748 Garching, Germany.

Physical Review Letters
|April 26, 2018
PubMed
Summary
This summary is machine-generated.

Low-energy positrons create brighter luminescence in phosphors than electrons. This discovery in semiconductor materials like ZnS:Ag and ZnO:Zn offers new insights into luminescent properties.

More Related Videos

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors
07:13

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors

Published on: November 15, 2016

10.7K
A Step Beyond BRET: Fluorescence by Unbound Excitation from Luminescence FUEL
07:04

A Step Beyond BRET: Fluorescence by Unbound Excitation from Luminescence FUEL

Published on: May 23, 2014

12.1K

Related Experiment Videos

Last Updated: Feb 11, 2026

Cerenkov Luminescence Imaging of Interscapular Brown Adipose Tissue
06:28

Cerenkov Luminescence Imaging of Interscapular Brown Adipose Tissue

Published on: October 7, 2014

13.8K
Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors
07:13

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors

Published on: November 15, 2016

10.7K
A Step Beyond BRET: Fluorescence by Unbound Excitation from Luminescence FUEL
07:04

A Step Beyond BRET: Fluorescence by Unbound Excitation from Luminescence FUEL

Published on: May 23, 2014

12.1K

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Surface Science

Background:

  • Luminescence in wide-band-gap semiconductors is crucial for display and lighting technologies.
  • Understanding the fundamental interactions of charged particles with phosphors is key to optimizing their performance.

Purpose of the Study:

  • To compare the luminescent efficiency of low-energy positrons versus electrons on semiconductor phosphors.
  • To investigate the energy dependence of luminescence yield for both particle types.

Main Methods:

  • Irradiation of ZnS:Ag and ZnO:Zn phosphor screens with low-energy positron and electron beams (0-5 keV).
  • Measurement and comparison of the resulting luminescence intensity for each particle type and energy.
  • Analysis of the energy dependency of the luminescence response.

Main Results:

  • Positrons produced significantly higher luminescence than electrons across tested phosphors.
  • The positron-to-electron luminescence ratio was strongly dependent on incident particle energy.
  • Low-energy positrons (tens of eV) yielded luminescence comparable to high-energy electrons (keV).

Conclusions:

  • Positron-induced luminescence is a more efficient process than electron-induced luminescence in these phosphors.
  • The enhanced luminescence is attributed to positron annihilation and subsequent Auger processes generating electron-hole pairs.
  • This finding provides a novel method for studying and enhancing luminescent materials.