Sentences with phrase «emitted by electrons»

A radio antenna then picks up very weak signals emitted by the electrons, which can be used to map the electrons» precise activity over several milliseconds.

Instead of relying on light waves emitted by electrons, it would use radiation emitted when the nucleus is excited to a high energy state, and then drops into a lower energy state.

Not exact matches

When struck by a particle of light, the detectors emit a single electron.

In certain isotopes of particular elements — species of atoms characterized by a given number of protons and neutrons — two beta decays can occur simultaneously, emitting two electrons and two antineutrinos.

PET employs the antiparticle of the electron, the positron, that is emitted by radioactive elements which can be attached to biologically active molecules that target specific sites of the body.

The researchers in Erlangen and Jena have now achieved this by focusing laser pulses onto a nanometre - sharp metal tip, causing the tip to emit electrons.

One possibility involves running the solar reaction in reverse, by capturing the neutrinos with lithium - 7 which would then be converted into beryllium - 7 and emit an electron.

The motion of an emitted electron is strongly affected by interactions inside the atom from which the electron is emitted.

The spectrometer is sensitive to wavelengths of light emitted by iron atoms that have lost all but 11 or 14 of their electrons.

By correlating the local effects of this emitted light with the position of the electron beam, spatial images of these effects can be reconstructed with nanometer - scale resolution.

By appropriately decorating those graphene sheets with gold nanoparticles, the INRS - EMT team was able to increase significantly the density of electron - emitting sites, and thereby improve their FEE performance.

No electrons are emitted for radiation with a frequency below that of the threshold, as the electrons are unable to gain sufficient energy to overcome the electrostatic barrier presented by the termination of the crystalline surface.

In this context, the two - step growth process developed by INRS researchers was demonstrated to enhance effectively the FEE performance of these new cold electron emitting cathodes.

The researchers observed this effect by using particle detectors to monitor the flight paths of electrons emitted from the near - fields of the nanospheres within the passage of the laser pulse.

In a traditional X-ray machine, a filament emits electrons when it is heated above a certain threshold, and those electrons fly through the body and hit a metal electrode on the other side, creating images; CT scans produce three - dimensional images by rotating the electron source.

The tick of an atomic clock is measured by the frequency of radiation emitted when electrons around an atom change energy states.

But Daya Bay's nuclear reactors produce billions of trillions of electron antineutrinos every second, emitted by neutrons during a process called «beta decay,» and scientists have finally been able to measure their metamorphosis as they pass through a series of detectors positioned outside the reactors.

Carbon paste is an essential ingredient due to its role in attracting electrons emitted by the bacteria.

The First X-Ray, by Wilhelm Conrad Röntgen (1895) Physicist Röntgen stumbled across a novel property of cathode rays, which is that they appeared to emit a light (electrons) that could be picked up by a photographic plate.

Oxygen absorbs the electrons emitted by steel corrosion and propels the steel to corrode faster.»

Tully runs a prototype lab in the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) that draws on the fact that neutrinos can be captured by tritium, a radioactive isotope of hydrogen, and provide a tiny boost of energy to the electrons emitted in tritium decay.

Michael's research showed how electrons absorb and emit phonons when bombarded by sound waves.

The first stars, however, also began emitting intense ultraviolet radiation that «re-ionized» neutral hydrogen atoms formed after the Big Bang by tearing electrons from their proton nuclei.

Gravitational waves are emitted by accelerating masses in much the same way as radio waves are produced by accelerating charges, such as electrons in antennas.

SESAME, which stands for Synchrotron - light for Experimental Science and Applications in the Middle East, is a light - source; a particle accelerator - based facility that uses electromagnetic radiation emitted by circulating electron beams to study a range of properties of matter.

Hormone Regeneration — there are secretagogues, which increase the endocrine glands» ability to secrete more hormone, and there are substances that truly regenerate hormones which have degraded (by emitting electrons) into potentially carcinogenic «transient hormone» metabolites.

It is easy to observe that H only emits very specific energies of light which are «easily» predicted by the quantum mechanics of the orbiting electrons and the allowed transitions between energy levels of those orbits.

But he also discovered by selecting individual wavelengths, that no matter how bright the illumination might get; some times there was no photo - electron emitted at all.

Ordinary atoms, once ionized by the removal of one or more electrons, also emit a continuum EM spectrum, which is not quantized, because a newly captured free electron can have any initial energy before being captured by the ion.