Sentences with phrase «ray photons»

Such a telescope would use large arrays of ground - based telescopes to detect blue flashes of Cerenkov radiation, which are caused by very high energy gamma - ray photons from cosmic sources smashing into the atmosphere.

, which are caused by very high energy gamma - ray photons from cosmic sources smashing into the atmosphere.

Gamma - ray photons are between 10,000 and 10,000,000 times more energetic than the photons of visible light when they originate from radioactive atomic nuclei.

Compton won the Nobel Prize in 1927 for his discovery of «Compton scattering,» which usually describes the behavior of x-ray and gamma - ray photons when they hit matter but which can also refer to the reaction of politicians in the California city of Compton upon the arrival of corruption investigators.

The most energetic particles that strike us from space, which include neutrinos as well as gamma - ray photons and various other bits of subatomic shrapnel, are called cosmic rays.

It is expected to operate for 10 years, observing high - energy gamma - ray photons from violent supermassive black holes and mysterious cosmic explosions called gamma - ray bursts.

That signal was based on only two of the Higgs's five possible decay routes, or channels — one that decays into four particles called leptons, and the other into two gamma - ray photons.

When the positrons collide with electrons in the atoms that make up the spacecraft, they annihilate each other, producing gamma - ray photons with a telltale energy in the process.

One reason: The pattern of gamma - ray photons streaming from the galactic center is clumpy rather than smooth, a strong sign that individual sources of gamma rays (rather than a diffuse cloud of particles that only occasionally interact) may be to blame.

What's more, as the particles move through their plasma, they generate the gamma ray photon particles.

Each image provides the direction of arrival of a gamma - ray photon, while the amount of light collected provides information about its energy.

With 21 sensors, GRaND can measure the energy of each gamma ray photon and each neutron.

Presumably, they have been created in relatively rare events — e.g., one in which a quantum of hard radiation, a gamma - ray photon, causes a neutron to be ejected.

Not exact matches

It is not «1 ray», but millions of photons at various wavelengths, some of which we can't see with our eyes, which evolved to detect primarily red, green, and blue wavelengths and combinations thereof.

[31] Also, Lemaitre's prediction that cosmic rays would include a and (3 particles in addition to photons is now confirmed by observation.

Meanwhile, the cosmic rays that escaped travel through intergalactic space and interact with photons to produce the glow of gamma rays.

Other photons from the laser beam would ricochet off the electrons and be boosted into high - energy gamma rays.

As black holes suck matter in, they produce charged particles that smash into gas molecules and photons, producing gamma rays.

Two seconds after the gravitational signal, which only the automated «trigger» of the Hanford detector initially noticed, NASA's orbiting Fermi Gamma - ray Space Telescope picked up a blast of high - energy photons called a gamma ray burst.

On Titan the photochemistry starts at the top of the atmosphere, about 1000 kilometres up, where energetic ultraviolet photons from the sun and cosmic rays trigger reactions among methane and nitrogen molecules.

Platzman's and Mills» gamma - ray laser proposal involves generating coherent emission of these 511 keV photons by persuading a large number of Ps atoms to commit suicide at the same time, thus generating an intense gamma - ray pulse.

But Steinbring says that high - energy photons — belonging to gamma rays and X-rays — could be perturbed by even weaker fluctuations in the quantum foam.

This plasma of high - energy electron particles then release a controlled beam of ultra-energized photons, the gamma rays.

Time sequence of frames, running top to bottom, suggests how some «seed photons» from spontaneous annihilation of a few Ps atoms will stimulate subsequent Ps annihilations, resulting in a pulse of 511 keV gamma rays

By building up images photon by photon, HESS can thus map astronomical objects in gamma rays.

In the following decades, astronomers have found hints that gamma rays — the universe's highest - energy photons — could be coming from Cygnus X-3 with energies as high as trillions or even quadrillions of electronvolts (eV).

Not all of the light rays (or photons) produced by matter falling into a black hole are trapped by the event horizon, a region of spacetime from which nothing can escape.

The gamma rays can also be stopped in their tracks if they collide with other photons to produce pairs of electrons and their antiparticles.

The high - energy cosmic neutrinos detected by IceCube are believed to originate from cosmic - ray interactions with matter (proton - proton interactions); from cosmic - ray interactions with radiation (proton - photon interactions); or from the decay or destruction of heavy, invisible «dark matter.»

«To understand all the processes on the sun we look at as many different particles coming from the sun as we can — photons, electrons, protons, neutrons, gamma rays - to gather different kinds of information,» said David Lawrence, first author of the paper at The Johns Hopkins Applied Physics Lab in Laurel, Maryland.

The low - energy photons that interact with protons to produce neutrinos in these events simultaneously prevent high - energy gamma rays from escaping via a process called «two - photon annihilation.»

Gamma - rays are extremely energetic photons and it takes a very violent event to produce them in large quantities.

The radioactive decay of radon gas produces alpha particles (consisting of two protons and two neutrons, an alpha particle is just the bare nucleus of a helium atom), beta particles (which are actually fast - moving electrons), and gamma rays (very energetic photons).

More important, a convergence of observations suggests that cosmic neutrinos spring from the same astrophysical sources as other particles from space: highly energetic photons called gamma rays, and mysterious ultra-high energy cosmic rays — protons and heavier atomic nuclei that reach energies a million times higher than humans have achieved with particle accelerators.

Launched in June and designed to detect high - energy photons called gamma rays, Fermi is actually a sophisticated particle detector that serves just as well to detect electrons and positrons.

The by - products include free neutrons, photons usually in the form gamma rays, and other nuclear fragments such as beta particles and alpha particles.

Over the past few years, terrestrial telescopes such as the Major Atmospheric Gamma - ray Imaging Cherenkov Telescope (MAGIC) in the Canary Islands and the High Energy Stereoscopic System (HESS) in Namibia have seen low - energy photons from a gamma - ray burst (GRB) arriving before their high - energy counterparts.

These neutrinos are thought to result from ultrahigh - energy cosmic rays crashing into the low - energy invisible photons left over from the Big Bang that still suffuse all of space.

Off the coast of west Africa, perched on the highest point of the Canary Islands, a gamma - ray telescope called MAGIC — the name stands for the Major Atmospheric Gamma - ray Imaging Cherenkov telescope — scans the heavens for bursts of high - energy photons from far corners of the universe.

The universe is opaque to ultraenergetic photons, or gamma rays, which are absorbed by the matter and radiation that lie between their source and Earth.

In the meantime, however, the exposed core becomes a violent scene of fusion reactions among remaining hydrogen and helium nuclei, which release a torrent of energetic photons, mostly in the form of ultraviolet rays.

The easy part is creating entangled photons: just shoot light through a special, «downconverting» crystal that acts as a beam splitter; it produces separate yet linked rays.

According to standard physics, cosmic rays created outside our galaxy with energies greater than about 1020 electronvolts (eV) should not reach Earth at those energies: as they travel over such vast regions of space they should lose energy because of collisions with photons of the cosmic microwave background (CMB), the radiation left over from the big bang.

The attached figure illustrates how energetic gamma rays (dashed lines) from a distant blazar strike photons of extragalactic background light (wavy lines) and produce pairs of electrons and positrons.

In the past decade, research by Dwyer and others has shown that storms also produce positrons, as well as highly energetic photons, or γ - rays.

As the lighter versions are easier to knock out into space with a stray cosmic ray or extra energy from solar photons, a higher fraction of heavy isotopes remaining in Mars's present - day atmosphere means much of the original atmosphere has been lost.

Not all the high - energy gamma rays emitted by a blazar, however, make it all the way across billions of light - years to Earth; some strike a hapless EBL photon along the way.

Different energies of the highest - energy gamma rays are waylaid by different energies of EBL photons.

Thus, measuring how much gamma rays of different energies are attenuated or weakened from blazars at different distances from Earth indirectly gives a measurement of how many EBL photons of different wavelengths exist along the line of sight from blazar to Earth over those different distances.

The evidence for the long - held idea that processing of ices by energetic photons and cosmic rays produces complex molecules is weak.